SGP/EBBR/E26 - Temperature from Left T/RH Probe Incorrect

The temperature from the left T/RH probe went offscale frequently.  This
temperature is used in the calculation of the vapor pressure.  Therefore,
top and bottom Thum measurements, left Thum, top and bottom vapor pressure 
measurements, vapor pressure gradients, and the resulting latent and 
sensible heat fluxes and bowen ratio were frequently incorrect for the 
period stated.

• Temperature of left humidity sensor chamber(rr_thum_l)

• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)

• bottom vapor pressure(vp_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• latent heat flux(e)

SGP/EBBR - EBBR E22 Moved, Data Missing/Incorrect

During, and as a consequence of, the relocation of E22 EBBR, some data
is missing or incorrect during the period above.  The data was 
sneakernetted on 3 Nov 99, so some of the data may have been recovered.
Some of the data during the period is incorrect as a consequence of
damage done by cattle during the period; inspection of the data is
required to determine incorrect data.

• Soil heat capacity 1(cs1)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Reference Thermistor Temperature(tref)
• top vapor pressure(vp_top)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• wind direction (relative to true north)(wind_d)
• Temperature of bottom humidity sensor chamber(thum_bot)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• Dummy altitude for Zeb(alt)
• Soil heat capacity 5(cs5)
• Temperature of the top humidity chamber(thum_top)
• volumetric soil moisture, site 5(sm5)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• net radiation(q)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• volumetric soil moisture, site 4(sm4)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• 0-5 cm integrated soil temperature, site 5(ts5)
• lat(lat)
• volumetric soil moisture, site 1(sm1)
• 5 cm soil heat flow, site 2(shf2)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 5 cm soil heat flow, site 5(shf5)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• base time(base_time)
• bottom vapor pressure(vp_bot)
• latent heat flux(e)
• 0-5 cm integrated soil temperature, site 2(ts1)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• lon(lon)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Retrieved pressure profile(pres)
• scalar wind speed(wind_s)
• average surface soil heat flow(ave_shf)
• Bottom humidity(hum_bot)
• 5 cm soil heat flow, site 3(shf3)
• soil heat flow, site 3(g3)
• soil heat flow, site 2(g2)
• Time offset of tweaks from base_time(time_offset)
• Top humidity(hum_top)
• 0-5 cm integrated soil temperature, site 4(ts4)
• soil heat flow, site 1(g1)
• h(h)
• volumetric soil moisture, site 3(sm3)
• 5 cm soil heat flow, site 4(shf4)
• bottom air temperature(tair_bot)
• 5 cm soil heat flow, site 1(shf1)
• soil heat flow, site 5(g5)
• Soil heat capacity 4(cs4)
• vector wind speed(res_ws)
• volumetric soil moisture, site 2(sm2)
• 0-5 cm integrated soil temperature, site 3(ts3)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• soil heat flow, site 4(g4)
• top air temperature(tair_top)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• Soil heat capacity 3(cs3)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Soil heat capacity 2(cs2)

• Home signal(mv_home)
• Soil temperature 2(rr_ts2)
• Dummy altitude for Zeb(alt)
• lat(lat)
• Soil temperature 1(rr_ts1)
• Soil heat flow 4(mv_hft4)
• Soil temperature 5(rr_ts5)
• lon(lon)
• base time(base_time)
• scalar wind speed(wind_s)
• Left air temperature(tair_l)
• Wind direction (relative to true north)(mv_wind_d)
• Soil moisture 1(r_sm1)
• Time offset of tweaks from base_time(time_offset)
• Soil heat flow 1(mv_hft1)
• Right relative humidity(mv_hum_r)
• Soil moisture 5(r_sm5)
• Net radiation(mv_q)
• Soil moisture 4(r_sm4)
• Left relative humidity(mv_hum_l)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Soil heat flow 3(mv_hft3)
• Soil moisture 3(r_sm3)
• Battery(bat)
• Soil temperature 3(rr_ts3)
• Signature(signature)
• Reference temperature(rr_tref)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Soil heat flow 2(mv_hft2)
• Soil moisture 2(r_sm2)
• Soil heat flow 5(mv_hft5)
• Soil temperature 4(rr_ts4)
• Right air temperature(tair_r)
• Atmospheric pressure(mv_pres)

• net radiation(q)
• scalar wind speed(wind_s)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)
• Temperature of the top humidity chamber(thum_top)
• Reference Thermistor Temperature(tref)
• Dummy altitude for Zeb(alt)
• Top humidity(hum_top)
• lat(lat)
• Time offset of tweaks from base_time(time_offset)
• Retrieved pressure profile(pres)
• Home signal(home)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom air temperature(tair_bot)
• vector wind speed(res_ws)
• top air temperature(tair_top)
• base time(base_time)
• Bottom humidity(hum_bot)
• lon(lon)

SGP/EBBR - EBBR E22 Net Radiation Incorrect

The upper dome of the net radiometer was broken, probably by migrating
birds, and water had drained into the bottom dome.  Since much of the data
is missing during the period, it is not clear exactly when the top dome was
broken during the period.  All net radiation data and sensible and latent 
heat fluxes data are incorrect for this period.

The affected data fields are:

5 minute:  q

15 minute: mv_q

30 minute: q, e, h

• h(h)
• latent heat flux(e)
• net radiation(q)

• Net radiation(mv_q)

• net radiation(q)

SGP/EBBR - EBBR E25 Data Missing/Incorrect During System Changeout

All data was missing or incorrect during the EBBR system changeout.

• Soil heat flow 1(mv_hft1)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Battery(bat)
• Soil heat flow 5(mv_hft5)
• Left air temperature(tair_l)
• lat(lat)
• Soil moisture 4(r_sm4)
• Signature(signature)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Net radiation(mv_q)
• Soil moisture 3(r_sm3)
• Left relative humidity(mv_hum_l)
• Soil temperature 1(rr_ts1)
• Home signal(mv_home)
• Soil heat flow 4(mv_hft4)
• Soil moisture 1(r_sm1)
• Reference temperature(rr_tref)
• Soil moisture 5(r_sm5)
• Soil temperature 4(rr_ts4)
• lon(lon)
• Atmospheric pressure(mv_pres)
• Right air temperature(tair_r)
• Dummy altitude for Zeb(alt)
• Right relative humidity(mv_hum_r)
• Wind direction (relative to true north)(mv_wind_d)
• Soil temperature 5(rr_ts5)
• Soil moisture 2(r_sm2)
• Soil heat flow 3(mv_hft3)
• Soil temperature 3(rr_ts3)
• Soil temperature 2(rr_ts2)
• Soil heat flow 2(mv_hft2)
• Time offset of tweaks from base_time(time_offset)
• base time(base_time)
• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• Reference Thermistor Temperature(tref)
• vector wind speed(res_ws)
• Time offset of tweaks from base_time(time_offset)
• Home signal(home)
• Top humidity(hum_top)
• wind direction (relative to true north)(wind_d)
• lon(lon)
• Dummy altitude for Zeb(alt)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• net radiation(q)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• bottom air temperature(tair_bot)
• base time(base_time)
• lat(lat)
• Retrieved pressure profile(pres)

• bottom vapor pressure(vp_bot)
• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow, site 5(shf5)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm integrated soil temperature, site 3(ts3)
• volumetric soil moisture, site 4(sm4)
• Temperature of bottom humidity sensor chamber(thum_bot)
• volumetric soil moisture, site 1(sm1)
• 0-5 cm integrated soil temperature, site 5(ts5)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• scalar wind speed(wind_s)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• top vapor pressure(vp_top)
• volumetric soil moisture, site 3(sm3)
• Dummy altitude for Zeb(alt)
• Bottom humidity(hum_bot)
• soil heat flow, site 4(g4)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 1(shf1)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow, site 3(shf3)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• Soil heat capacity 3(cs3)
• soil heat flow, site 5(g5)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• base time(base_time)
• volumetric soil moisture, site 2(sm2)
• bottom air temperature(tair_bot)
• lon(lon)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• Soil heat capacity 4(cs4)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• vector wind speed(res_ws)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• wind direction (relative to true north)(wind_d)
• Temperature of the top humidity chamber(thum_top)
• h(h)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• top air temperature(tair_top)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• Retrieved pressure profile(pres)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Reference Thermistor Temperature(tref)
• Soil heat capacity 2(cs2)
• Top humidity(hum_top)
• soil heat flow, site 2(g2)
• net radiation(q)
• soil heat flow, site 3(g3)
• Soil heat capacity 1(cs1)
• volumetric soil moisture, site 5(sm5)
• latent heat flux(e)
• lat(lat)
• Soil heat capacity 5(cs5)
• 0-5 cm integrated soil temperature, site 2(ts1)
• Time offset of tweaks from base_time(time_offset)
• 0-5 cm integrated soil temperature, site 4(ts4)

SGP/EBBR - EBBR E20 Data Incorrect from SHF #5

something, since the problem began during J-panel changeout the 4/7/99 PM.
At the 7/21/99 PM, the reference temperature was repaired and reseated.  At
that time the SHF #5 data became correct again; the two events are probably
related only in that other connections, including that of the SHF #5, were
probably reseated at the same time.  The report of the PM activity is not
detailed enough to determine the exact causes and fixes.

The incorrect SHF #5 data can be identified by it being an order of 
magnitude larger than the values from the other soil heat flow sensors.

Affected data are:

5 minute:  none
15 minute: mv_hft5
30 minute: shf5, c_shf5, g5, ave_shf, e, h

• latent heat flux(e)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• 5 cm soil heat flow, site 5(shf5)
• soil heat flow, site 5(g5)
• h(h)
• average surface soil heat flow(ave_shf)

• Soil heat flow 5(mv_hft5)

SGP/EBBR - EBBR E20 Thermocouple Data Incorrect

Left and right thermocouple air temperature data are incorrect during the
replacement of the right thermocouple.

Affected data are:

5 minute:  tair_bot, tair_top
15 minute: tai_r, tair_l
30 minute: tair_bot, tair_top, e, h, bowen

• top air temperature(tair_top)
• latent heat flux(e)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• bottom air temperature(tair_bot)

• top air temperature(tair_top)
• bottom air temperature(tair_bot)

• Right air temperature(tair_r)
• Left air temperature(tair_l)

SGP/EBBR/E26 - Left T/RH Probe Temperature Data Incorrect

Left T/RH probe temperature is frequently offscale during the period.
Examine the data (compare with the the T/RH right temperature) to determine
which times are incorrect.  Replacement of the probe on 29 June 1999 
solved the problem.

Affected data are:

5 minute:  tair_bot, tair_top
15 minute: tair_l
30 minute: tair_bot, tair_top, e, h, bowen

• Left air temperature(tair_l)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)

• top air temperature(tair_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• bottom air temperature(tair_bot)
• latent heat flux(e)

SGP/EBBR - EBBR E25 Data Missing/Incorrect During Program Upload

All data was missing or incorrect during the upload of the CR10X program;
the program was uploaded after checking the SHF #1 calibration.

• Soil heat flow 1(mv_hft1)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Battery(bat)
• Soil heat flow 5(mv_hft5)
• Left air temperature(tair_l)
• lat(lat)
• Soil moisture 4(r_sm4)
• Signature(signature)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Net radiation(mv_q)
• Soil moisture 3(r_sm3)
• Left relative humidity(mv_hum_l)
• Soil temperature 1(rr_ts1)
• Home signal(mv_home)
• Soil heat flow 4(mv_hft4)
• Soil moisture 1(r_sm1)
• Reference temperature(rr_tref)
• Soil moisture 5(r_sm5)
• Soil temperature 4(rr_ts4)
• lon(lon)
• Atmospheric pressure(mv_pres)
• Right air temperature(tair_r)
• Dummy altitude for Zeb(alt)
• Right relative humidity(mv_hum_r)
• Wind direction (relative to true north)(mv_wind_d)
• Soil temperature 5(rr_ts5)
• Soil moisture 2(r_sm2)
• Soil heat flow 3(mv_hft3)
• Soil temperature 3(rr_ts3)
• Soil temperature 2(rr_ts2)
• Soil heat flow 2(mv_hft2)
• Time offset of tweaks from base_time(time_offset)
• base time(base_time)
• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• Reference Thermistor Temperature(tref)
• vector wind speed(res_ws)
• Time offset of tweaks from base_time(time_offset)
• Home signal(home)
• Top humidity(hum_top)
• wind direction (relative to true north)(wind_d)
• lon(lon)
• Dummy altitude for Zeb(alt)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• net radiation(q)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• bottom air temperature(tair_bot)
• base time(base_time)
• lat(lat)
• Retrieved pressure profile(pres)

• bottom vapor pressure(vp_bot)
• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow, site 5(shf5)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm integrated soil temperature, site 3(ts3)
• volumetric soil moisture, site 4(sm4)
• Temperature of bottom humidity sensor chamber(thum_bot)
• volumetric soil moisture, site 1(sm1)
• 0-5 cm integrated soil temperature, site 5(ts5)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• scalar wind speed(wind_s)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• top vapor pressure(vp_top)
• volumetric soil moisture, site 3(sm3)
• Dummy altitude for Zeb(alt)
• Bottom humidity(hum_bot)
• soil heat flow, site 4(g4)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 1(shf1)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow, site 3(shf3)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• Soil heat capacity 3(cs3)
• soil heat flow, site 5(g5)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• base time(base_time)
• volumetric soil moisture, site 2(sm2)
• bottom air temperature(tair_bot)
• lon(lon)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• Soil heat capacity 4(cs4)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• vector wind speed(res_ws)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• wind direction (relative to true north)(wind_d)
• Temperature of the top humidity chamber(thum_top)
• h(h)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• top air temperature(tair_top)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• Retrieved pressure profile(pres)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Reference Thermistor Temperature(tref)
• Soil heat capacity 2(cs2)
• Top humidity(hum_top)
• soil heat flow, site 2(g2)
• net radiation(q)
• soil heat flow, site 3(g3)
• Soil heat capacity 1(cs1)
• volumetric soil moisture, site 5(sm5)
• latent heat flux(e)
• lat(lat)
• Soil heat capacity 5(cs5)
• 0-5 cm integrated soil temperature, site 2(ts1)
• Time offset of tweaks from base_time(time_offset)
• 0-5 cm integrated soil temperature, site 4(ts4)

SGP/EBBR - EBBR E25 Data Missing/Incorrect During Solar Panel Change

All data was missing or incorrect during the replacement of the solar 
panel.

• Soil heat flow 1(mv_hft1)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Battery(bat)
• Soil heat flow 5(mv_hft5)
• Left air temperature(tair_l)
• lat(lat)
• Soil moisture 4(r_sm4)
• Signature(signature)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Net radiation(mv_q)
• Soil moisture 3(r_sm3)
• Left relative humidity(mv_hum_l)
• Soil temperature 1(rr_ts1)
• Home signal(mv_home)
• Soil heat flow 4(mv_hft4)
• Soil moisture 1(r_sm1)
• Reference temperature(rr_tref)
• Soil moisture 5(r_sm5)
• Soil temperature 4(rr_ts4)
• lon(lon)
• Atmospheric pressure(mv_pres)
• Right air temperature(tair_r)
• Dummy altitude for Zeb(alt)
• Right relative humidity(mv_hum_r)
• Wind direction (relative to true north)(mv_wind_d)
• Soil temperature 5(rr_ts5)
• Soil moisture 2(r_sm2)
• Soil heat flow 3(mv_hft3)
• Soil temperature 3(rr_ts3)
• Soil temperature 2(rr_ts2)
• Soil heat flow 2(mv_hft2)
• Time offset of tweaks from base_time(time_offset)
• base time(base_time)
• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• Reference Thermistor Temperature(tref)
• vector wind speed(res_ws)
• Time offset of tweaks from base_time(time_offset)
• Home signal(home)
• Top humidity(hum_top)
• wind direction (relative to true north)(wind_d)
• lon(lon)
• Dummy altitude for Zeb(alt)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• net radiation(q)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• bottom air temperature(tair_bot)
• base time(base_time)
• lat(lat)
• Retrieved pressure profile(pres)

• bottom vapor pressure(vp_bot)
• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow, site 5(shf5)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm integrated soil temperature, site 3(ts3)
• volumetric soil moisture, site 4(sm4)
• Temperature of bottom humidity sensor chamber(thum_bot)
• volumetric soil moisture, site 1(sm1)
• 0-5 cm integrated soil temperature, site 5(ts5)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• scalar wind speed(wind_s)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• top vapor pressure(vp_top)
• volumetric soil moisture, site 3(sm3)
• Dummy altitude for Zeb(alt)
• Bottom humidity(hum_bot)
• soil heat flow, site 4(g4)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 1(shf1)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow, site 3(shf3)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• Soil heat capacity 3(cs3)
• soil heat flow, site 5(g5)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• base time(base_time)
• volumetric soil moisture, site 2(sm2)
• bottom air temperature(tair_bot)
• lon(lon)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• Soil heat capacity 4(cs4)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• vector wind speed(res_ws)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• wind direction (relative to true north)(wind_d)
• Temperature of the top humidity chamber(thum_top)
• h(h)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• top air temperature(tair_top)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• Retrieved pressure profile(pres)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Reference Thermistor Temperature(tref)
• Soil heat capacity 2(cs2)
• Top humidity(hum_top)
• soil heat flow, site 2(g2)
• net radiation(q)
• soil heat flow, site 3(g3)
• Soil heat capacity 1(cs1)
• volumetric soil moisture, site 5(sm5)
• latent heat flux(e)
• lat(lat)
• Soil heat capacity 5(cs5)
• 0-5 cm integrated soil temperature, site 2(ts1)
• Time offset of tweaks from base_time(time_offset)
• 0-5 cm integrated soil temperature, site 4(ts4)

SGP/EBBR - EBBR E25 Data Incorrect During J-panel Change

Some data was incorrect during the replacement of the J-panel #4. 

Affected data are:

5 minute:  tair_top, tair_bot, thum_top, thum_bot, vp_top, vp_bot, tref
15 minute: rr_thum_r, rr_thum_l, rr_ts1, rr_ts2, rr_ts3, rr_ts4, rr_ts5,
           r_sm1, r_sm2, r_sm3, r_sm4, r_sm5, tair_r, tair_l, r_tref
30 minute: bowen, e, h, tair_top, tair_bot, thum_top, thum_bot, vp_top, 
           vp_bot, sm1, sm2, sm3, sm4, sm5, shf1, shf2, shf3, shf4, shf5,
           c_shf1, c_shf2, c_shf3, c_shf4, c_shf5, ts1, ts2, ts3, ts4, ts5,
           cs1, cs2, cs3, cs4, cs5, ces1, ces2, ces3, ces4, ces5, g1, g2,
           g3, g4, g5, ave_shf, tref

• Soil temperature 4(rr_ts4)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Right air temperature(tair_r)
• Left air temperature(tair_l)
• Soil moisture 4(r_sm4)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Soil temperature 5(rr_ts5)
• Soil moisture 3(r_sm3)
• Soil temperature 1(rr_ts1)
• Soil moisture 2(r_sm2)
• Soil temperature 3(rr_ts3)
• Soil temperature 2(rr_ts2)
• Soil moisture 1(r_sm1)
• Reference temperature(rr_tref)
• Soil moisture 5(r_sm5)

• bottom vapor pressure(vp_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• top air temperature(tair_top)
• Reference Thermistor Temperature(tref)
• bottom air temperature(tair_bot)

• bottom vapor pressure(vp_bot)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow, site 5(shf5)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm integrated soil temperature, site 3(ts3)
• volumetric soil moisture, site 4(sm4)
• Soil heat capacity 4(cs4)
• Temperature of bottom humidity sensor chamber(thum_bot)
• volumetric soil moisture, site 1(sm1)
• 0-5 cm integrated soil temperature, site 5(ts5)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• 5 cm soil heat flow, site 4(shf4)
• Temperature of the top humidity chamber(thum_top)
• h(h)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• top air temperature(tair_top)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• top vapor pressure(vp_top)
• volumetric soil moisture, site 3(sm3)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• soil heat flow, site 4(g4)
• Reference Thermistor Temperature(tref)
• Soil heat capacity 2(cs2)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 1(shf1)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• soil heat flow, site 2(g2)
• 5 cm soil heat flow, site 2(shf2)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow, site 3(shf3)
• Soil heat capacity 1(cs1)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• volumetric soil moisture, site 5(sm5)
• latent heat flux(e)
• Soil heat capacity 3(cs3)
• soil heat flow, site 5(g5)
• Soil heat capacity 5(cs5)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm integrated soil temperature, site 2(ts1)
• volumetric soil moisture, site 2(sm2)
• 0-5 cm integrated soil temperature, site 4(ts4)
• bottom air temperature(tair_bot)

SGP/EBBR - EBBR E25 Thermocouple Temperatures Incorrect

Thermocouple temperature data was incorrect during the period, for unknown 
reasons. 

Affected data are:

5 minute:  tair_top, tair_bot
15 minute: tair_r, tair_l
30 minute: bowen, e, h, tair_top, tair_bot

• Left air temperature(tair_l)
• Right air temperature(tair_r)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)

• latent heat flux(e)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• top air temperature(tair_top)
• bottom air temperature(tair_bot)

SGP/EBBR/E26 - Right Aspirator Not Working

The right aspirator fan did not work during the period.

The following values were therefore incorrect:

5 minute:  tair_top, tair_bot, thum_top. thum_bot, hum_top, hum_bot,
           vp_top, vp_bot
15 minute: rr_thum_l, mv_hum_l, tair_l
30 minute: tair_top, tair_bot, thum_top. thum_bot, hum_top, hum_bot,
           vp_top, vp_bot, e, h, bowen

• Temperature of left humidity sensor chamber(rr_thum_l)
• Left air temperature(tair_l)
• Left relative humidity(mv_hum_l)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• Bottom humidity(hum_bot)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Top humidity(hum_top)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)

• bottom vapor pressure(vp_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)
• h(h)
• Temperature of the top humidity chamber(thum_top)
• bottom air temperature(tair_bot)
• latent heat flux(e)
• Bottom humidity(hum_bot)

SGP/EBBR/E26 - Anemometer Not Working, Wind Speed Incorrect

The anemometer was not working during this period.

The following values were therefore incorrect:

5 minute:  wind_s, res_ws
15 minute: wind_s
30 minute: wind_s, res_ws

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

SGP/EBBR/26 - Low Battery Condition

When battery voltage was less than 10.4 V DC during this period, all
data should be considered to be incorrect.  The cause of the problem
was a broken trace on J-panel #3.

• Soil temperature 3(rr_ts3)
• Battery(bat)
• Soil temperature 4(rr_ts4)
• lat(lat)
• Signature(signature)
• Soil moisture 5(r_sm5)
• Soil heat flow 5(mv_hft5)
• base time(base_time)
• Time offset of tweaks from base_time(time_offset)
• Soil moisture 4(r_sm4)
• Net radiation(mv_q)
• Reference temperature(rr_tref)
• Soil temperature 5(rr_ts5)
• Right air temperature(tair_r)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Atmospheric pressure(mv_pres)
• Soil heat flow 4(mv_hft4)
• scalar wind speed(wind_s)
• Right relative humidity(mv_hum_r)
• Soil moisture 1(r_sm1)
• Left relative humidity(mv_hum_l)
• Soil heat flow 2(mv_hft2)
• Dummy altitude for Zeb(alt)
• Soil moisture 2(r_sm2)
• Soil heat flow 1(mv_hft1)
• Soil temperature 2(rr_ts2)
• Soil moisture 3(r_sm3)
• Wind direction (relative to true north)(mv_wind_d)
• Left air temperature(tair_l)
• Home signal(mv_home)
• Soil temperature 1(rr_ts1)
• Soil heat flow 3(mv_hft3)
• lon(lon)
• Temperature of left humidity sensor chamber(rr_thum_l)

• Time offset of tweaks from base_time(time_offset)
• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Home signal(home)
• wind direction (relative to true north)(wind_d)
• top vapor pressure(vp_top)
• lat(lat)
• lon(lon)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• scalar wind speed(wind_s)
• Temperature of the top humidity chamber(thum_top)
• net radiation(q)
• Retrieved pressure profile(pres)
• vector wind speed(res_ws)
• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)
• Dummy altitude for Zeb(alt)
• base time(base_time)
• Bottom humidity(hum_bot)
• Reference Thermistor Temperature(tref)

• volumetric soil moisture, site 1(sm1)
• 0-5 cm integrated soil temperature, site 3(ts3)
• soil heat flow, site 2(g2)
• volumetric soil moisture, site 4(sm4)
• Dummy altitude for Zeb(alt)
• 5 cm soil heat flow, site 2(shf2)
• base time(base_time)
• Reference Thermistor Temperature(tref)
• 5 cm soil heat flow, site 5(shf5)
• vector wind speed(res_ws)
• soil heat flow, site 1(g1)
• volumetric soil moisture, site 3(sm3)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• 0-5 cm integrated soil temperature, site 2(ts1)
• soil heat flow, site 5(g5)
• volumetric soil moisture, site 2(sm2)
• 5 cm soil heat flow, site 1(shf1)
• Retrieved pressure profile(pres)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• Top humidity(hum_top)
• average surface soil heat flow(ave_shf)
• Temperature of the top humidity chamber(thum_top)
• net radiation(q)
• scalar wind speed(wind_s)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• lat(lat)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• 0-5 cm integrated soil temperature, site 5(ts5)
• top air temperature(tair_top)
• soil heat flow, site 4(g4)
• Soil heat capacity 5(cs5)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• bottom vapor pressure(vp_bot)
• Soil heat capacity 3(cs3)
• lon(lon)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Soil heat capacity 2(cs2)
• Time offset of tweaks from base_time(time_offset)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• bottom air temperature(tair_bot)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• top vapor pressure(vp_top)
• 5 cm soil heat flow, site 4(shf4)
• wind direction (relative to true north)(wind_d)
• 5 cm soil heat flow, site 3(shf3)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• Bottom humidity(hum_bot)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• volumetric soil moisture, site 5(sm5)
• 0-5 cm integrated soil temperature, site 4(ts4)
• Soil heat capacity 1(cs1)
• h(h)
• latent heat flux(e)
• Soil heat capacity 4(cs4)

SGP/EBBR - EBBR E20 Right Air Temperature Incorrect

The right air temperature (thermocouple) output was frequently offscale.
Examination of the 15 minute data will clearly show which times are
affected during the period.

The affected data are:

5 minute:  tair_top, tair_bot
15 minute: tair_r
30 minute: tair_top, tair_bot, bowen, h, e

• top air temperature(tair_top)
• latent heat flux(e)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• bottom air temperature(tair_bot)

• top air temperature(tair_top)
• bottom air temperature(tair_bot)

• Right air temperature(tair_r)

SGP/EBBR - EBBR E22 Soil Moistures Negative

Because of the lack of rain, soil moistures were negative during much 
of the period.  All five soil moisture sensors had negative outputs by 
early on Aug 1.  The negative soil moistures affected sensible and latent
heat fluxes slightly.

The affected data are:

15 minute: r_sm1, r_sm2, r_sm3, r_sm4, r_sm5
30 minute: sm1, sm2, sm3, sm4, sm5, c_shf1, c_shf2, c_shf3, c_shf4,
           c_shf5, cs1, cs2, cs3, cs4, cs5, ces1, ces2, ces3, ces4, ces5,
           g1, g2, g3, g4, g5, ave_shf, e, h

• Soil heat capacity 1(cs1)
• soil heat flow, site 5(g5)
• volumetric soil moisture, site 1(sm1)
• average surface soil heat flow(ave_shf)
• Soil heat capacity 4(cs4)
• soil heat flow, site 3(g3)
• soil heat flow, site 2(g2)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• volumetric soil moisture, site 2(sm2)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• Soil heat capacity 5(cs5)
• latent heat flux(e)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• soil heat flow, site 4(g4)
• volumetric soil moisture, site 5(sm5)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• soil heat flow, site 1(g1)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• volumetric soil moisture, site 4(sm4)
• h(h)
• Soil heat capacity 3(cs3)
• volumetric soil moisture, site 3(sm3)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Soil heat capacity 2(cs2)

• Soil moisture 3(r_sm3)
• Soil moisture 5(r_sm5)
• Soil moisture 4(r_sm4)
• Soil moisture 2(r_sm2)
• Soil moisture 1(r_sm1)

SGP/EBBR - EBBR E25 Net Radiation Incorrect

The net radiometer top dome was broken and water had entered.  Net 
radiation values are therefore incorrect during the period.

The affected data are:

5 minute:  q
15 minute: mv_q
30 minute: q, h, e

• Net radiation(mv_q)

• net radiation(q)

• latent heat flux(e)
• h(h)
• net radiation(q)

SGP/EBBR/E26 - Net Radiation Incorrect

The net radiometer top dome was broken and water had entered.  Net 
radiation values are therefore incorrect during the period.

The affected data are:

5 minute:  q
15 minute: mv_q
30 minute: q, h, e

• Net radiation(mv_q)

• net radiation(q)

• h(h)
• net radiation(q)
• latent heat flux(e)

SGP/EBBR - EBBR E22 Soil Moistures Negative

Because of the lack of rain, all soil moistures were negative during much 
of the period.  The negative soil moistures caused soil heat storage and
thus average soil heat flux to be smaller than they should have been.  The
sensible and latent heat fluxes were therefore reduced slightly 
(approximately 0-5%).

The affected data are:

15 minute: r_sm1, r_sm2, r_sm3, r_sm4, r_sm5
30 minute: sm1, sm2, sm3, sm4, sm5, c_shf1, c_shf2, c_shf3, c_shf4,
           c_shf5, cs1, cs2, cs3, cs4, cs5, ces1, ces2, ces3, ces4, ces5,
           g1, g2, g3, g4, g5, ave_shf, e, h

• Soil heat capacity 1(cs1)
• soil heat flow, site 5(g5)
• volumetric soil moisture, site 1(sm1)
• average surface soil heat flow(ave_shf)
• Soil heat capacity 4(cs4)
• soil heat flow, site 3(g3)
• soil heat flow, site 2(g2)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• volumetric soil moisture, site 2(sm2)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• Soil heat capacity 5(cs5)
• latent heat flux(e)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• soil heat flow, site 4(g4)
• volumetric soil moisture, site 5(sm5)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• soil heat flow, site 1(g1)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• volumetric soil moisture, site 4(sm4)
• h(h)
• Soil heat capacity 3(cs3)
• volumetric soil moisture, site 3(sm3)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Soil heat capacity 2(cs2)

• Soil moisture 3(r_sm3)
• Soil moisture 5(r_sm5)
• Soil moisture 4(r_sm4)
• Soil moisture 2(r_sm2)
• Soil moisture 1(r_sm1)

SGP/EBBR - EBBR E20 Left Air Temperature Incorrect

Left air temperature (thermocouple) was incorrect during part of the period,
thereby affecting top and bottom air temperature.

The affected data and times are:

5 minute:  tair_top (1935 GMT)
15 minute: tair_l (1945 GMT)
30 minute: tair_top, bowen, e, h (2000 GMT)

• top air temperature(tair_top)
• latent heat flux(e)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)

• top air temperature(tair_top)

• Left air temperature(tair_l)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR - EBBR E25 Soil Heat Flow #1 Incorrect

Soil heat flux #1 was large negative or offscale numerous times.

• Soil heat flow 1(mv_hft1)

• latent heat flux(e)
• average surface soil heat flow(ave_shf)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 3(shf3)

SGP/EBBR/E22 - Air Temperature Sensor malfunction

The right air temperature probe (thermocouple) malfunctioned during the
periods stated above at Cordell, OK (E22).  It was replaced on December 21,
1993 and good data began again with the 1830 GMT half hour average.  For the
periods of interest, 5 and 30 minute values of tair_top and tair_bot are
incorrect when the right probe was in the specified position; 15 minute values of
tair_r are incorrect; and 30 minute values of bowen, e, and h are incorrect.  None of
these values are recoverable or recalculatable through the use of other
quantities since both air temperature probes are needed to determine bowen
ratio.

• bottom air temperature(tair_bot)
• h(h)
• latent heat flux(e)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top air temperature(tair_top)

• Right air temperature(tair_r)

• top air temperature(tair_top)
• bottom air temperature(tair_bot)

SGP/EBBR/E20 - Blown fuse in AEM at E20

On October 30, 1993, before 1300 GMT, the fuse in the AEM (Automatic
Exchange Mechanism) of Meeker, Ok (E20) EBBR blew out.  The AEM remained
nonfunctional until the fuse was replaced just before 1600 GMT on
November 12, 1993.  This situation resulted in the following invalid data:

5 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
          vp_top, vp_bot, home

15 minute: rr_thum_r, rr_thum_l, mv_hum_r, mv_hum_l, mv_home, tair_r,
           tair_l

30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot, bowen, e, h, home_15, home_30


If the biases of the sensors were know, bowen, h, and e could be
recalculated from the 15 minute and/or 5 minute data.  Since we will not
have any idea of what those biases are until an annual calibration of the
sensors can take place (which may be months away), the recalculations
cannot be performed at this time.  Furthermore, it may be invalid to use
sensor biases, if determined too far removed in time, due to the gradual
calibration drift of some of the sensors.

• Right air temperature(tair_r)
• Home signal(mv_home)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left relative humidity(mv_hum_l)
• Left air temperature(tair_l)
• Right relative humidity(mv_hum_r)
• Temperature of left humidity sensor chamber(rr_thum_l)

• Bottom humidity(hum_bot)
• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• top air temperature(tair_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• top vapor pressure(vp_top)
• h(h)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Top humidity(hum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• latent heat flux(e)
• bottom air temperature(tair_bot)
• Exchange mechanism position indicator (0 to 15 min)(home_15)

• Temperature of the top humidity chamber(thum_top)
• Bottom humidity(hum_bot)
• bottom air temperature(tair_bot)
• bottom vapor pressure(vp_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)
• Home signal(home)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)

SGP/EBBR/E22 - Incorrect averaging interval at E22

On November 9, 1993 version 4 of the EBBR program installed at Cordell, OK
(E22) was mistakenly modified in one area during the process of modifying a
calibration in another part of the program.  The mistaken modification was
a change in the execution interval from 30 seconds to 10 seconds.  This
modification remained in the program until November 22, 1993 when it was
discovered and changed back to a 30 second execution interval.  The
modification produced no ill effects as the execution interval only
changes sampling and averaging periods.  A 10 second execution interval
results in three times as many samples being taken, which, when averaged,
should actually produce more accurate results.  Therefore, data quality was
not affected.  This PIF was written only to document the fact that the
mistaken modification was made, and when it was made.

• Soil heat capacity 1(cs1)
• Retrieved pressure profile(pres)
• scalar wind speed(wind_s)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Bottom humidity(hum_bot)
• average surface soil heat flow(ave_shf)
• Reference Thermistor Temperature(tref)
• top vapor pressure(vp_top)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow, site 3(shf3)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• soil heat flow, site 2(g2)
• Time offset of tweaks from base_time(time_offset)
• wind direction (relative to true north)(wind_d)
• Temperature of bottom humidity sensor chamber(thum_bot)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• Top humidity(hum_top)
• Dummy altitude for Zeb(alt)
• Soil heat capacity 5(cs5)
• 0-5 cm integrated soil temperature, site 4(ts4)
• Temperature of the top humidity chamber(thum_top)
• volumetric soil moisture, site 5(sm5)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• soil heat flow, site 1(g1)
• net radiation(q)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• volumetric soil moisture, site 4(sm4)
• h(h)
• volumetric soil moisture, site 3(sm3)
• 5 cm soil heat flow, site 4(shf4)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• bottom air temperature(tair_bot)
• 0-5 cm integrated soil temperature, site 5(ts5)
• soil heat flow, site 5(g5)
• 5 cm soil heat flow, site 1(shf1)
• lat(lat)
• volumetric soil moisture, site 1(sm1)
• 5 cm soil heat flow, site 2(shf2)
• Soil heat capacity 4(cs4)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 5 cm soil heat flow, site 5(shf5)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• vector wind speed(res_ws)
• base time(base_time)
• volumetric soil moisture, site 2(sm2)
• 0-5 cm integrated soil temperature, site 3(ts3)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• bottom vapor pressure(vp_bot)
• latent heat flux(e)
• 0-5 cm integrated soil temperature, site 2(ts1)
• soil heat flow, site 4(g4)
• top air temperature(tair_top)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• Soil heat capacity 3(cs3)
• lon(lon)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Soil heat capacity 2(cs2)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)

SGP/EBBR/E20 - Reprocess: Questionable data in soil heat fluxes at E20

Soil heat flux probes #4 had been indicating soil heat fluxes that were
higher than the other four probes.  It was decided to replace it.
On November 24, 1993 Soil Heat Flux probe #4 was replaced, resulting in
outputs more similar to the other four probes.  This PIF does not
invalidate previous measurements by the old probe #4, but only indicates
data that is bad as a result of the replacement procedure.  This procedure
resulted in some bad data for the adjoining soil heat flux probes #3 and #5
also.  Bad data for #3 includes the 1600 GMT half hour, and 5 and 15 minute
periods between 1530 and 1600 GMT.  Bad data for #4 includes half hour
times of 1600 through 1900 GMT, with 5 and 15 minute data inbetween those times
being invalid as well.  Bad data for #5 includes half hour times of 1630
and 1700 GMT, with 5 and 15 minute periods inbetween those times being
invalid as well.  Corrupted 30 minute values of shf4, c_shf4, g4, ave_shf, h,
and e, and corrupted 15 minute values of mv_hft4 resulted.  The quantities
shf4, c_shf4, g4, and mv_hft4 are bad data values and are not recoverable.
The other quantities can be recalculated using the remaining functioning
set(s) of soil sensors.

Use the following equations:

ave_shf = (gs summed)/n,

    where n is the number of probes functioning

e = -(q + ave_shf)/(1 + bowen)   where q is net radiation, and bowen is
                                 Bowen Ratio
h = e * bowen

• Soil heat flow 3(mv_hft3)
• Soil heat flow 4(mv_hft4)
• Soil heat flow 5(mv_hft5)

• 5 cm soil heat flow, site 5(shf5)
• soil heat flow, site 5(g5)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 5 cm soil heat flow, site 4(shf4)
• latent heat flux(e)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• h(h)
• soil heat flow, site 4(g4)
• 5 cm soil heat flow, site 3(shf3)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• average surface soil heat flow(ave_shf)

SGP/EBBR/E26 - Invalid data during Preventative Maintenance

During a preventative maintenance visit the +12V DC supply to the wind
direction sensor at E26, Cement, Ok was temporarily disconnected, resulting
in invalid wind direction data for December 28, 1993 from 1645 through 1900
GMT.  The following fields are therefore invalid for that period:

30 minute: wind_d, sigma_wd, res_ws

15 minute: mv_wind_d

5 minute: wind_d, sigma_wd, res_ws.

• Wind direction (relative to true north)(mv_wind_d)

• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• vector wind speed(res_ws)
• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

SGP/EBBR/E26 - Winds, SM2 Invalid data 10/10/93 - 2/2/94

Beginning October 10, 1993 the EBBR system at E26, Cement, OK began to have
problems with outputs from soil moisture sensor number 2 and the wind direction
sensor.  This situation also occured in early 1993 and was eliminated by
replacing the soil moisture sensor (after replacing the wind direction
sensor did not help).  This time, replacing the soil moisture sensor did
not help, but the problem has not re-occured since the wind direction
sensor was replaced on February 2, 1994.  During periods of bad data the
wind direction output is a constant 135 degrees and soil moisture two is
offscale.

Invalid data for a constant wind direction of 135 degrees is:

30 minute: res_ws, wind_d, sigma_wd

15 minute: mv_wind_d

5 minute: res_ws, wind_d, sigma_wd.

Invalid data for soil moisture 2 offscale is:

30 minute: sm2, c_shf2, cs2, ces2, g2, ave_shf, h, e

15 minute: r_sm2

5 minute: no data affected.

    Apparent cause of data loss, if known:   Apparently an electronic
    problem in interfacing an intermittently malfunctioning wind direction
    sensor to the data acquisition system multiplexer, thereby affecting
    the other sensor (soil moisture 2) on that multiplexer pair.

• Wind direction (relative to true north)(mv_wind_d)
• Soil moisture 2(r_sm2)

• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• soil heat flow, site 2(g2)
• Soil heat capacity 2(cs2)
• wind direction (relative to true north)(wind_d)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• average surface soil heat flow(ave_shf)
• volumetric soil moisture, site 2(sm2)
• latent heat flux(e)
• 0-5 cm change in soil heat storage with time, site 2(ces2)

SGP/EBBR/E26 - Wind Direction Sensor Malfunction

The wind direction sensor malfunctioned, outputting nearly a 
constant value, invalidating the following data values.

30 minute: wind_d, sigma_wd, res_ws

15 minute: mv_wind_d

5 minute: wind_d, sigma_wd, res_ws

The first good data after the affected period was the 1700 GMT, 30 minute
data on March 16, 1994.

• Wind direction (relative to true north)(mv_wind_d)

• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• vector wind speed(res_ws)
• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

SGP/EBBR/E20 - Pressure Sensor Malfunction

Pressure sensor malfunction during attempt to monitor it during Preventative
Maintenance visit.  30 minute values of pressure for 1600 GMT and 1630 GMT,
15 minute values for 1600, 1615, and 1630, and 5 minute values for 1600,
1605, 1610, 1615, 1620, 1625, and 1630 GMT are incorrect.  However, the
range of the incorrect values was such as to not adversely affect flux
measurements.  Some noise was apparently induced in the pressure output
voltage as a result of the monitoring, although it is not known how.

• top vapor pressure(vp_top)
• Retrieved pressure profile(pres)
• bottom vapor pressure(vp_bot)

• bottom vapor pressure(vp_bot)
• top vapor pressure(vp_top)
• Retrieved pressure profile(pres)

• Dummy altitude for Zeb(alt)

SGP/EBBR/E26 - Wind Speed Malfunction

For an unknown reason, the wind speed sensor at Cement began to record very
low wind speeds on a consistent basis, with most of the speeds recorded
reflecting what appeared to be zero wind speed (calibration offset).  When
the sensor was replaced on 5/25/94, it was damaged, although this damage
apparently did not occur until a thunderstorm around midnight (local time)
May 24.  The wind direction sensor was also damaged by the storm at the
same time.  At any rate, the wind speed data during the period listed 
should be considered questionable.  The wind speed sensor was replaced on
May 25, 1994 at 1639.  Old sensor S/N K1032, New sensor S/N K1035.

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

SGP/EBBR/E26 - Wind Direction Sensor Failure

Apparently, a fairly severe thunderstorm passed over the Cement, OK EBBR
early on May 25, 1994 (around midnight May 24, local time).  The storm
damaged the wind direction sensor and the wind speed sensor.  Wind
Direction and Sigma of Wind Direction data for the period listed 
should be considered incorrect.  The sensors were replaced on May 25, 1994
at 1631.  Old sensor S/N K3038, New sensor S/N K3040.

• Wind direction (relative to true north)(mv_wind_d)

• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

SGP/EBBR/E20 - Soil Moisture Probe

Beginning on May 6, 1994, soil moisture probe #3 began a long decline in
output and sensitivity until it stabilized at a low value of around 7, with
virtually no sensitivity at midday (GMT) on May 22, 1994.  The output
remained around this low value until the probe was replaced on June 9,
1994 at 1545 GMT.  Old Probe S/N 92038, New Probe S/N 93003.

• volumetric soil moisture, site 3(sm3)

• Soil moisture 3(r_sm3)

SGP/EBBR/E26 - Soil Moisture Sensor Malfunction

Soil moisture sensor #1 at Cement, Ok, E26 began a slow drift downwards on
July 31, 1994.  This continued until the sensor was replaced at 1700 GMT on
August 17, 1994.  The downwards drift occured coincident with a constant
decrease in soil moisture at the site.  As a result, the average soil
moisture (for the set of five sensors) was reduced by only about 2% (for a
range of 10 to 22%), and thus had a negligible effect on the calculations
of sensible and latent heat flux.  The sm1 output dropped below zero at
times during August 14-17.

Soil Moisture #1 Data Fields:

15 minute: r_sm1

30 minute:  sm1

• Soil moisture 1(r_sm1)

• volumetric soil moisture, site 1(sm1)

SGP/EBBR/E20 - Fan Stopped, T and RH Biases

Another fan stoppage situation occurred.  This is the fourth one in the
last few months and may indicate a weakening of the fans that aspirate the
temperature, relative humidity housings.  The 15 minute data reveals that
the stoppage occurred at approximately 1300 GMT on September 12.  The left fan
was cleaned out by site operations personnel and began running again at
1847 GMT on September 14.  The 15 minute data during this period shows that
during daytime, the left temperature was greater than the right temperature and
that the left relative humidity was lower than the right relative humidity
(a consequence of greater temperature), irregardless of the positions of the
housings.  The bowen ratio, sensible heat flux and latent heat flux for this
period, as well as all left housing temperatures and relative humidities are
incorrect.  The data values that are incorrect are:

5 minute:  tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot

15 minute: rr_thum_l, mv_hum_l, tair_l,

30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, thum_bot,
           vp_top, vp_bot, bowen, e, h

Because of the increased frequency of fan stoppage occurrences, I have
submitted a work request to site operations to use the portable vane
anemometer to check the flow of the housing fans on each EBBR and visually
check (and clean if needed) the fans for debris that would restrict the
flow.  Included in this work request are instructions for checking the
performance of the temperature and relative humidity sensors by
manually putting the aspirator housings at the same height for a half hour
period (so that two 15 minute and one half hour comparison result).

The latter part of the work request is prompted by my close inspection of
the Meeker data for the last few weeks.  It is clear that significant
biases have developed in the pairs of temperature and relative humidity
sensors; left thermocouple ~0.5 deg. C greater than right thermocouple,
left relative humidity ~5% lower than right relative humidity.  Biases were
expected in operating the systems over long time periods, and these appear
to be the result of simple offsets, not changes in calibrations.
At this point, I just want to determine how large the offsets are.
Comparison of these offsets between EBBR units, in light of the different
lengths of time that EBBR units and individual sensors have been deployed,
may provide some interesting information on likely offset changes with time.

• Bottom humidity(hum_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Top humidity(hum_top)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom vapor pressure(vp_bot)
• top air temperature(tair_top)
• latent heat flux(e)
• top vapor pressure(vp_top)
• h(h)
• bottom air temperature(tair_bot)

• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• top air temperature(tair_top)
• bottom air temperature(tair_bot)
• Top humidity(hum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)

• Left air temperature(tair_l)
• Left relative humidity(mv_hum_l)
• Temperature of left humidity sensor chamber(rr_thum_l)

SGP/EBBR/E20 - Soil Moisture Probe Failure

Soil moisture probe #4 went offscale for a short period, for unknown
reasons. However, it may have resulted from Site Operations Preventative
Maintenance activities that were taking place at the time.  The times of
incorrect values are listed below.

30 minute: 1600 GMT; sm4, c_shf4, cs4, ces4, g4, ave_shf, e, h
15 minute: 1600 GMT; r_sm4

• latent heat flux(e)
• Soil heat capacity 4(cs4)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• volumetric soil moisture, site 4(sm4)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• h(h)
• soil heat flow, site 4(g4)
• average surface soil heat flow(ave_shf)

• Soil moisture 4(r_sm4)

SGP/EBBR/E20 - Aspirator Fan Stoppage

During Site Operations Preventative Maintenance activities the left AEM fan
stopped operating.  This affected some of the data being collected.  The
times of incorrect values are listed below.

15 minute: 1530-1715 GMT; tair_l, mv_hum_l, rr_thum_l
30 minute: 1530-1730 GMT; thum_top, thum_bot, tair_top, tair_bot, hum_top,
                          hum_bot, e, h, bowen

• Bottom humidity(hum_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Top humidity(hum_top)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom vapor pressure(vp_bot)
• top air temperature(tair_top)
• latent heat flux(e)
• top vapor pressure(vp_top)
• h(h)
• bottom air temperature(tair_bot)

• Left air temperature(tair_l)
• Left relative humidity(mv_hum_l)
• Temperature of left humidity sensor chamber(rr_thum_l)

SGP/EBBR/E26 - Wind Direction Sensor Affect on Soil Moisture 2

I have written a number of previous PIFs and DQRs about this same problem
previously.  This occurred most recently at E9, Ashton, KS in August 1994.
The wind direction sensor is on the same data acquisition system multiplexer
pair as soil moisture sensor 2.  Sometimes a malfunctioning wind direction
sensor (resulting in a constant wind direction of 135 degrees) will cause the
soil moisture 2 measurement to be offscale.  Between 0430 and 0800 GMT the wind
direction sensor did not function properly at E22, Cordell, KS.  As has often
been the case, soil moisture measurements were affected for a shorter time
period, from 0500 through 0730 GMT.  The cause of this problem is unknown and
only occurs on the multiplexer pair to which the wind direction sensor is
connected, not on any other pair to which a soil moisture sensor is attached.
None of the manufacturers of the applicable equipment can explain the
problem.  As done before, I will monitor the data for further occurrences
of this condition; if the frequency of occurrence increases, further action
will be taken.

The following data and times are incorrect:

Winds: 0430-0800 GMT

5 minute:  wind_d, sigma_wd, res_ws
15 minute: mv_wind_d
30 minute: wind_d, sigma_wd, res_ws

Soil Moisture 2: 0500-0730 GMT

15 minute: r_sm2
30 minute: sm2, c_shf2, cs2, ces2, g2, ave_shf, h, e

• Wind direction (relative to true north)(mv_wind_d)
• Soil moisture 2(r_sm2)

• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• soil heat flow, site 2(g2)
• volumetric soil moisture, site 2(sm2)
• Soil heat capacity 2(cs2)
• latent heat flux(e)
• 0-5 cm change in soil heat storage with time, site 2(ces2)

SGP/EBBR/E26 - T/RH Check

During the month of November 1994, site operations personnel conducted
field comparisons of the temperature and relative humidity sensors in the
EBBRs and the HMI31 portable T/RH meter (with the removable probe).  As is
reflected in the home signal output, the automatic exchange mechanism was
disabled in order to conduct the checks.

Measurements were taken every 5 minutes, for a half hour each in the
aspirated radiation shields (the HMI31 was inserted into the EBBR aspirated
radiation shield to provide the same aspiration as the EBBR sensors
received).  Measurements of aspirator flow were also recorded.  This
information was provided to the mentor.  The mentor then compared the field
checks with the data recorded by the EBBRs.

The periods of data and data fields that are incorrect because of the checks
are listed below.  Times are those at which the data are reported.


Data Fields

5 minute:  tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot
15 minute: rr_thum_r, rr_thum_l, mv_hum_r, mv_hum_l, tair_r, tair_l
30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot, bowen, e, h

5 minute:  1615, 1620, 1625, 1630, 1635, 1640, 1645, 1650, 1655,
           1700, 1705, 1710, 1715, 1720, 1725, 1730, 1735
15 minute: 1615, 1630, 1645, 1700, 1715, 1730, 1745
30 minute: 1630, 1700, 1730, 1800

(EDITOR'S NOTE:  The following analysis refers to all EBBRs installed in Nov 1994)

Results of the T/RH comparisons:
The combined accuracy of the HMI31 and EBBR temperature sensors
(thermocouples or PRTDs) is +/- 0.4 degrees C.  The combined accuracy of the
HMI31 and EBBR RH sensors is +/- 4% for RH less than 80%, and +/- 6% for RH
greater than 80%.  The combined accuracy for each pair of EBBR sensors of
the same type is essentially the same as the quantities stated above.

All of the pairs of EBBR sensors show differences that fall within the
stated combined accuracies.  Although this sounds wonderful, a few of the
differences are close to the combined accuracy, which, because of the small
differences in temperature being measured (normally smaller than the
magnitude of the combined accuracy) could lead to some incorrect estimation
of sensible and latent heat flux.  However, unless there would be substantial
differences of calibration slope of two sensors in a pair, the switching of
height of the sensors every 15 minutes by the automatic exchange mechanism
will remove the offset between the sensors.

The comparisons between the EBBR sensors and the HMI31 T/RH meter showed
much larger differences.  The range of differences were: -2.4 to 0.0 degrees
for the thermocouples, -2.1 to 0.1 degrees for the RH probe PRTDs, and -6.6 to
6.7 percent for the RH sensors.  Six Thermocouples indicated differences from
the HMI31 greater than the combined accuracy.  Seven PRTDs indicated
differences from the HMI31 greater than the combined accuracy.  Four RH
sensors indicated differences from the HMI31 greater than the combined
accuracy.  The temperature differences (for both thermocouples and PRTDs)
were nearly all of one sign; the HMI31 indicated the greater temperature,
which may suggest a bias in the HMI31 temperature measurement, even though
a dozen differences of +/- 0.2 degrees were measured.  Four differences of
zero and only one positive difference (out of 40) were measured.  Thirteen of
the 20 RH differences were positive (HMI31 indicating the lower
RH), with the differences near the level of the combined accuracies being
approximately 50% positive and 50% negative.  It does not appear that the
HMI31 has a RH bias.

Plots of EBBR sensor/HMI31 differences as a function of time from the
installation of the individual sensors (a range of 10 to 30 months in the
field) shows no obvious pattern of sensor drift with time.  This is encouraging.

• Temperature of right humidity sensor chamber(rr_thum_r)
• Left air temperature(tair_l)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Right relative humidity(mv_hum_r)
• Left relative humidity(mv_hum_l)
• Right air temperature(tair_r)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)

• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top vapor pressure(vp_top)
• top air temperature(tair_top)
• Top humidity(hum_top)
• Temperature of the top humidity chamber(thum_top)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• h(h)
• bottom air temperature(tair_bot)
• latent heat flux(e)

SGP/EBBR/E26 - Frozen Wind Speed Sensor

On February 16, 1994 a frontal system deposited freezing rain in central
Oklahoma that resulted in the EBBR wind speed instrument becoming frozen in
place at Cement (E26) for part of two days.  All 5, 15, and 30 minute data
values indicated below are incorrect for all times within the period
indicated.

5 minute:  wind_s, res_ws
15 minute: wind_s
30 minute: wind_s, res_ws

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

SGP/EBBR/E26 - Stopped Ventilation Fan

On April 11, 1995, a site operator discovered the right aspirator ventilation
fan of the EBBR to be stopped.  Inspection of the data indicates that this
condition occurred during the two periods shown above; the fan apparently
worked briefly inbetween the periods.  Lack of ventilation of
the temperature and relative humidity sensors attached to the AEM results
in incorrect measurements of air temperature and relative humidity by the
right aspirator probes, and therefore all quantities calculated from them,
including sensible and latent heat fluxes, are incorrect as well.
The quantities that are incorrect for the periods indicated are:

5 minute:  tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, and vp_bot

15 minute: rr_thum_r, mv_hum_r, tair_r

30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot, bowen, e, h

• Temperature of right humidity sensor chamber(rr_thum_r)
• Right relative humidity(mv_hum_r)
• Right air temperature(tair_r)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• Bottom humidity(hum_bot)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Top humidity(hum_top)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)

• bottom vapor pressure(vp_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)
• h(h)
• Temperature of the top humidity chamber(thum_top)
• bottom air temperature(tair_bot)
• latent heat flux(e)
• Bottom humidity(hum_bot)

SGP/EBBR/E26 - Reprocess: Soil Heat Flow Sensor 1 Replacement

During preventative maintenance, site operations personnel observed that
soil heat flow sensor #1 at Cement, OK (E26) was outputting larger values
than the other four sensors.  Therefore, they replaced sensor #1.  A review
of the data indicates that the sensor was not malfunctioning, but that its
calibration was just too large.  The longer the sensors are in the ground,
the greater the likelihood that they will drift from their original
calibration.  The difference in the average soil heat flux caused by the #1
sensor data values being included in the average will have less than a 5%
affect on the calculated latent and sensible heat fluxes.  The data should
therefore not be labelled as incorrect.

However, during the replacement of sensor #1, the #1 data was spiked,
causing the following data values to be incorrect for the period listed:

15 minute: mv_hft1 at 1945 GMT.
30 minute: shf5, c_shf5, g5, ave_shf, e, h, bowen at 2000 GMT.

The latent and sensible heat fluxes can be recalculated by using only soil
heat flows 2 through 5 to calculate the average soil heat flow,

ave_shf = (g2 + g3 + g4 + g5)/4

e = -(q + ave_shf)/(1 + bowen)

h = -(e + ave_shf + q).

• Soil heat flow 1(mv_hft1)

• 5 cm soil heat flow, site 5(shf5)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• soil heat flow, site 5(g5)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• average surface soil heat flow(ave_shf)
• h(h)
• latent heat flux(e)

SGP/EBBR/E26 - Right Air Temperature Malfunction

The right air temperature probe malfunctioned continuously during the
periods of time indicated above as continuous.  On May 16, 1995, by 1900 GMT,
the probe was replaced (old S/N 92007, new S/N 92013).  There was a complete
loss of data between 1200 and 1900 GMT as Site Operations repaired a corroded
battery terminal.  For several days the right air temperature probe worked
well.  However, between May 24 and 28, the right air temperature probe
malfunctioned continuously again.  The right air temperature probe
malfunctioned intermittently between May 28 and June 1, as well as
during short periods on June 5 and 6.  The cause of these latter periods is
unknown; the time periods do not correspond with any Site Operations
activities.  During the intermittent periods the data that is not offscale
should be viewed as questionable, as it is not always easy to detect what
effect the malfunction might have had on that data.

The malfunction of the right air temperature probe results in incorrect Bowen
ratio, sensible heat flux, and latent heat flux during the periods indicated.

The data values that are affected are:

5 minute:  tair_top, tair_bot

15 minute: tair_r

30 minute: tair_top, tair_bot, bowen, e, h.

• Right air temperature(tair_r)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)

• top air temperature(tair_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• bottom air temperature(tair_bot)
• latent heat flux(e)

SGP/EBBR/E20 - Frozen Wind Speed Sensor

On March 7, 1995 freezing rain stopped the cups of the EBBR wind
speed instrument at Meeker, OK (E20).  All 5, 15, and 30
minute data values indicated below are incorrect for the period listed above.

5 minute:  wind_s, res_ws
15 minute: wind_s
30 minute: wind_s, res_ws

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• scalar wind speed(wind_s)

SGP/EBBR/E26 - Frozen Wind Speed Sensor

On March 6, 1995 freezing rain stopped the cups of the EBBR wind
speed instrument at Cement, OK (E26).  All 5, 15, and 30
minute data values indicated below are incorrect for the period listed.

5 minute:  wind_s, res_ws
15 minute: wind_s
30 minute: wind_s, res_ws

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

SGP/EBBR/E26 - Frozen Wind Speed Sensor

A broken lead on the EBBR wind speed instrument cable at Cement, OK (E26)
resulted in the loss of wind speed data.  It was nearly a month before the
cable could be repaired and reinstalled.  All 5, 15, and 30
minute data values indicated below are incorrect for the periods listed above.

5 minute:  wind_s, res_ws
15 minute: wind_s
30 minute: wind_s, res_ws

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

SGP/EBBR/E20 - Reprocess: Soil Temperature Malfunction

During parts of three days, soil temperature probe #4 indicated values
that were either too high or too low, for unknown reasons.  Site
Operations personnel checked connections and repacked the soil around the
probe on 21 July at about 1535 GMT, although ts4 had recovered to proper
values the previous day.

The times of incorrect data and the affected quantities are shown below.
Some of the ts4 values during the listed periods appear to be correct,
although the change in energy storage values appear to indicate otherwise.

18 July: 0400-1400 GMT
19 July: 0430-0500, 0730-1500 GMT
29 July: 0700-1630 GMT

15 minute: rr_ts4

30 minute: ts4, ces4, g4, ave_shf, e, h

Sensible, latent, and soil heat fluxes need to be recalculated using the
change in energy storage of probes 1-3 and 5, as follows.

ave_shf = (g1 + g2 + g3 + g5)/4

e = -(q + ave_shf)/(1 +bowen)

h = -(e + ave_shf +q)

• latent heat flux(e)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• h(h)
• soil heat flow, site 4(g4)
• average surface soil heat flow(ave_shf)

• Soil temperature 4(rr_ts4)

SGP/EBBR/E20 - Annual Calibration Changeout

On August 9, 1995 between 0930-2030 GMT, the changeout for annual calibration occurred at 
E20, Meeker, OK.  Soil measurements data should be used with caution for the following 
week at least, as the sensors require time to "settle" into the soil.

• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• Soil heat capacity 3(cs3)
• volumetric soil moisture, site 4(sm4)
• volumetric soil moisture, site 2(sm2)
• volumetric soil moisture, site 1(sm1)
• 5 cm soil heat flow, site 1(shf1)
• 0-5 cm integrated soil temperature, site 3(ts3)
• Soil heat capacity 2(cs2)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• Soil heat capacity 5(cs5)
• 0-5 cm integrated soil temperature, site 5(ts5)
• volumetric soil moisture, site 5(sm5)
• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow, site 5(shf5)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 5 cm soil heat flow, site 4(shf4)
• Soil heat capacity 4(cs4)
• 0-5 cm integrated soil temperature, site 2(ts1)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Soil heat capacity 1(cs1)
• 5 cm soil heat flow, site 3(shf3)
• volumetric soil moisture, site 3(sm3)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)

SGP/EBBR/E20 - AEM Home 30 Values Low

The first EBBR to achieve annual calibration changeout was Meeker, Ok, E20.
However, soon after changeout on August 9, 1995, the home 30 value dropped below
15, intermittently, to typically 0.3 to 0.5; this causes a data quality message
to be output in the site operations log as the stated acceptable range for home
30 is 15 to 34.999999.  However, no data is incorrect as a result of this
condition.

No replacement AEM is available, as the changeout kit AEMs are somewhat
different from the initial units.  Site operations hopes to have time to
diagnose the problem on the next PM visit and correct the problem.  At
present, data quality is not jeopardized.

I will submit another DQR or addendum when successful replacement of the
AEM is accomplished.

• soil heat flow, site 1(g1)
• Bottom humidity(hum_bot)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• volumetric soil moisture, site 1(sm1)
• 5 cm soil heat flow, site 1(shf1)
• 0-5 cm integrated soil temperature, site 3(ts3)
• top air temperature(tair_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• top vapor pressure(vp_top)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• soil heat flow, site 4(g4)
• 0-5 cm integrated soil temperature, site 5(ts5)
• average surface soil heat flow(ave_shf)
• volumetric soil moisture, site 5(sm5)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• net radiation(q)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 5 cm soil heat flow, site 2(shf2)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Top humidity(hum_top)
• 5 cm soil heat flow, site 5(shf5)
• soil heat flow, site 5(g5)
• soil heat flow, site 2(g2)
• Retrieved pressure profile(pres)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Time offset of tweaks from base_time(time_offset)
• Soil heat capacity 4(cs4)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• vector wind speed(res_ws)
• Reference Thermistor Temperature(tref)
• volumetric soil moisture, site 3(sm3)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• Dummy altitude for Zeb(alt)
• Soil heat capacity 3(cs3)
• volumetric soil moisture, site 4(sm4)
• volumetric soil moisture, site 2(sm2)
• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• Soil heat capacity 2(cs2)
• soil heat flow, site 3(g3)
• lat(lat)
• Soil heat capacity 5(cs5)
• h(h)
• base time(base_time)
• wind direction (relative to true north)(wind_d)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 0-5 cm integrated soil temperature, site 2(ts2)
• Temperature of bottom humidity sensor chamber(thum_bot)
• 5 cm soil heat flow, site 4(shf4)
• lon(lon)
• latent heat flux(e)
• 0-5 cm integrated soil temperature, site 2(ts1)
• Soil heat capacity 1(cs1)
• scalar wind speed(wind_s)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• 5 cm soil heat flow, site 3(shf3)
• bottom air temperature(tair_bot)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)

• vector wind speed(res_ws)
• Dummy altitude for Zeb(alt)
• bottom air temperature(tair_bot)
• base time(base_time)
• Retrieved pressure profile(pres)
• lat(lat)
• wind direction (relative to true north)(wind_d)
• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)
• lon(lon)
• top vapor pressure(vp_top)
• Temperature of the top humidity chamber(thum_top)
• net radiation(q)
• Bottom humidity(hum_bot)
• Time offset of tweaks from base_time(time_offset)
• Reference Thermistor Temperature(tref)
• top air temperature(tair_top)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Home signal(home)
• scalar wind speed(wind_s)

SGP/EBBR/E26 - AEM not exchanging

On August 26, 1995 at approximately 0345 GMT the gears on the lower sprocket
shaft of the AEM appear to have been damaged, causing the AEM to stop
exchanging.  The home signal values then remained at around -0.5 for both
home_15 and Home_30.  On August 29 site operations personnel removed the fuse
(to prevent exchange) with the left aspirator in the down position.  The AEM
will remain in this condition until a replacement is available.

Therefore, the calculations of Bowen ratio, latent heat flux, and sensible heat
flux are incorrect for all times after August 26, 1995 at 0345 GMT.  The data
fields listed below are incorrect after this time:

5 minute:  tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot

30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top,
           hum_bot, vp_top, vp_bot, Bowen, e, h.

It is not possible to reliably calculate the Bowen ratio, e, and h using the
15 minute data.

• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• Bottom humidity(hum_bot)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Top humidity(hum_top)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)

• bottom vapor pressure(vp_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)
• h(h)
• Temperature of the top humidity chamber(thum_top)
• bottom air temperature(tair_bot)
• latent heat flux(e)
• Bottom humidity(hum_bot)

SGP/EBBR/E26 - AEM replacement

Please see DQR P950908.2, where this problem was first documented.

On August 26, 1995 at approximately 0345 GMT the gears on the lower sprocket
shaft of the AEM appear to have been damaged, causing the AEM to stop
exchanging.  The home signal values then remained at around -0.5 for both
home_15 and Home_30.  On August 29 site operations personnel removed the fuse
(to prevent exchange) with the left aspirator in the down position.

On 12 September 1995 the AEM was replaced at 1959 GMT (old S/N 92004,
new S/N 92008) and is functioning properly.

Calculations of Bowen ratio, latent heat flux, and sensible heat
flux are incorrect for all times during the period above.  The data
fields listed below are incorrect during the period:

5 minute:  tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot

30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top,
           hum_bot, vp_top, vp_bot, Bowen, e, h.

It is not possible to reliably calculate the Bowen ratio, e, and h using the
15 minute data.

• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• Bottom humidity(hum_bot)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Top humidity(hum_top)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)

• bottom vapor pressure(vp_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)
• h(h)
• Temperature of the top humidity chamber(thum_top)
• bottom air temperature(tair_bot)
• latent heat flux(e)
• Bottom humidity(hum_bot)

SGP/EBBR/E26 - Battery Voltage Drop

Shortly after the PM visit on September 26, 1995 the EBBR battery voltage at
E26, Cement, OK declined to lower than acceptable levels.  During the October
13, 1995 PM visit the battery was replaced.  I do not know the specifics of why
the battery voltage declined so suddenly, but failure of one or more of the
battery cells is a possibility.  I have not received the site operations log of
the PM visit yet.  The voltage dropped to 10 volts at night.  At various times,
soil temperature, soil heat flux plate output, and atmospheric pressure (at
least) were not reported correctly by the CR10 datalogger.

Amazingly, the AEM continued to work and reported millivolt outputs that
did not fall below the acceptable ranges.

All data between 2100 GMT on September 26, 1995 and 1230 GMT on October 13,
1995 should be considered suspect, particularly when the battery voltage
fell below 11 volts (every nighttime).  This general caution is issued
because incorrect reporting of data also took place during times when the
battery voltage was reported as 12 Volts, a normally acceptable level;
the reason for this behavior is unknown.

• Soil temperature 2(rr_ts2)
• Atmospheric pressure(mv_pres)
• Soil temperature 3(rr_ts3)
• Soil temperature 4(rr_ts4)
• Soil temperature 1(rr_ts1)
• Soil temperature 5(rr_ts5)

• Retrieved pressure profile(pres)

• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 0-5 cm integrated soil temperature, site 3(ts3)
• top vapor pressure(vp_top)
• 5 cm soil heat flow, site 4(shf4)
• 0-5 cm integrated soil temperature, site 5(ts5)
• 5 cm soil heat flow, site 3(shf3)
• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• 5 cm soil heat flow, site 5(shf5)
• bottom vapor pressure(vp_bot)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm integrated soil temperature, site 2(ts1)
• 5 cm soil heat flow, site 1(shf1)
• Retrieved pressure profile(pres)

SGP/EBBR/E26 - Net Radiometer Dome Punctured

The upper dome of the net radiometer was punctured sometime between the PM
visits of September 12 and 26, 1995.  After the puncture, water collected
in the top hemisphere.  The water was removed on September 26, but a
replacement dome was not available.  The dome was replaced during the PM
visit on October 13, 1995.  The puncture and water did not result in
obviously incorrect data.  I cannot tell when the puncture occurred from
the data.  The data, particularly during the two weeks between September 12
and 26, 1995, should be considered suspect.

Suspect net radiation data results in the latent heat flux and sensible
heat flux also being suspect.  Suspect data then includes:

5 minute:  q

15 minute: mv_q

30 minute: q, e, h.

• Net radiation(mv_q)

• net radiation(q)

• h(h)
• net radiation(q)
• latent heat flux(e)

SGP/EBBR/E9 - 3-month Check

During EBBR 3 month checks the Automatic Exchange Mechanism is disabled
(reflected by home signals near zero) so that the two aspirator units can be
placed at the same height.  The measurements during this period, at least,
do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h),
or latent heat flux (e), nor do the air temperature and relative humidity
measurements indicate gradients.  Checks performed before or after the AEM
is disabled also lead to some incorrect data.

• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom air temperature(tair_bot)
• Bottom humidity(hum_bot)
• top air temperature(tair_top)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• Top humidity(hum_top)

• Left air temperature(tair_l)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Right relative humidity(mv_hum_r)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Right air temperature(tair_r)
• Left relative humidity(mv_hum_l)

• latent heat flux(e)
• top air temperature(tair_top)
• Temperature of the top humidity chamber(thum_top)
• Bottom humidity(hum_bot)
• Top humidity(hum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom air temperature(tair_bot)
• bottom vapor pressure(vp_bot)
• h(h)
• top vapor pressure(vp_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)

SGP/EBBR/E22 - Missing data

The EBBR 9 pin serial line was plugged into the wrong modem (as per site
ops log notes) during a PM visit.  Data was not collected remotely for two
weeks as a result.  I will include this period in my list of missing data
days to Ken Yates for sneakernet ingest, but I write of it here because it is
a long period of (presently) missing data.

• Soil heat capacity 1(cs1)
• Retrieved pressure profile(pres)
• scalar wind speed(wind_s)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Bottom humidity(hum_bot)
• average surface soil heat flow(ave_shf)
• Reference Thermistor Temperature(tref)
• top vapor pressure(vp_top)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow, site 3(shf3)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• soil heat flow, site 2(g2)
• Time offset of tweaks from base_time(time_offset)
• wind direction (relative to true north)(wind_d)
• Temperature of bottom humidity sensor chamber(thum_bot)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• Top humidity(hum_top)
• Dummy altitude for Zeb(alt)
• Soil heat capacity 5(cs5)
• 0-5 cm integrated soil temperature, site 4(ts4)
• Temperature of the top humidity chamber(thum_top)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• volumetric soil moisture, site 5(sm5)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• soil heat flow, site 1(g1)
• net radiation(q)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• volumetric soil moisture, site 4(sm4)
• h(h)
• volumetric soil moisture, site 3(sm3)
• 5 cm soil heat flow, site 4(shf4)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• bottom air temperature(tair_bot)
• 0-5 cm integrated soil temperature, site 5(ts5)
• soil heat flow, site 5(g5)
• 5 cm soil heat flow, site 1(shf1)
• lat(lat)
• volumetric soil moisture, site 1(sm1)
• 5 cm soil heat flow, site 2(shf2)
• Soil heat capacity 4(cs4)
• 0-5 cm integrated soil temperature, site 2(ts2)
• vector wind speed(res_ws)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• 5 cm soil heat flow, site 5(shf5)
• base time(base_time)
• volumetric soil moisture, site 2(sm2)
• 0-5 cm integrated soil temperature, site 3(ts3)
• bottom vapor pressure(vp_bot)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• latent heat flux(e)
• soil heat flow, site 4(g4)
• 0-5 cm integrated soil temperature, site 2(ts1)
• top air temperature(tair_top)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• Soil heat capacity 3(cs3)
• lon(lon)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Soil heat capacity 2(cs2)

• net radiation(q)
• Reference Thermistor Temperature(tref)
• Dummy altitude for Zeb(alt)
• Top humidity(hum_top)
• lat(lat)
• Time offset of tweaks from base_time(time_offset)
• scalar wind speed(wind_s)
• Retrieved pressure profile(pres)
• Home signal(home)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom air temperature(tair_bot)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)
• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• top air temperature(tair_top)
• base time(base_time)
• Bottom humidity(hum_bot)
• lon(lon)
• wind direction (relative to true north)(wind_d)
• Temperature of the top humidity chamber(thum_top)

SGP/EBBR/E26 - Right Tair Offscale

On 1 November 1995 at E26, Cement, OK EBBR the right thermocouple output
went offscale for a few hours.  The cause for this is unknown and the
sensor recovered fully.  Incorrect data for the period above includes:

5 minute:   tair_top, tair_bot

15 minute:  tair_r, tair_l

30 minute:  tair_top, tair_bot, bowen, h, e

• Left air temperature(tair_l)
• Right air temperature(tair_r)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)

• top air temperature(tair_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• bottom air temperature(tair_bot)
• latent heat flux(e)

SGP/EBBR/E13 - AEM Exchange Stopped in Snow and Freezing Rain

On the night of November 10-11, a north-south line from south central
Kansas through south central Oklahoma received snow and freezing rain and experienced
below freezing temperatures.  This caused the EBBR automatic exchange mechanism (AEM) to
stop exchanging temporarily.   

Note that temperatures, relative humidities, and vapor pressures are not affected; these
are correct as measured, but the height at which the measurements occurred must be
determined from the home signal value.

• latent heat flux(e)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)

SGP/EBBR/E20 - Soil Heat Flow Zero Under Unchanging Conditions

This DQR is written to inform users of the data that the EBBR soil heat flow
measurements of zero during much of 11 November 1995 at E20, Meeker, OK are
correct values.  Nearly unchanging conditions of net radiation, air
temperature, and soil moisture, plus high wind speeds and near neutral
atmospheric stability, resulted in almost unchanging conditions of
soil temperature and ten and a half hours of zero soil heat flow
output from all soil heat flow plates (some plates outputted zero for
longer than this).  The change in energy storage (determined from the
change in temperature with time of the soil above the plates) was very
nearly zero also during the period of interest.

Such an extended period of zero soil heat flow and the accompanying
unchanging soil and atmospheric conditions is quite rare and therefore
worth noting here in case someone using the data might mistakenly think
that the data is incorrect.

• soil heat flow, site 1(g1)
• Bottom humidity(hum_bot)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• volumetric soil moisture, site 1(sm1)
• 5 cm soil heat flow, site 1(shf1)
• 0-5 cm integrated soil temperature, site 3(ts3)
• top air temperature(tair_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• 0-5 cm integrated soil temperature, site 4(ts4)
• top vapor pressure(vp_top)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• soil heat flow, site 4(g4)
• 0-5 cm integrated soil temperature, site 5(ts5)
• average surface soil heat flow(ave_shf)
• volumetric soil moisture, site 5(sm5)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• net radiation(q)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 5 cm soil heat flow, site 2(shf2)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Top humidity(hum_top)
• 5 cm soil heat flow, site 5(shf5)
• soil heat flow, site 5(g5)
• soil heat flow, site 2(g2)
• Retrieved pressure profile(pres)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Time offset of tweaks from base_time(time_offset)
• Soil heat capacity 4(cs4)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• vector wind speed(res_ws)
• Reference Thermistor Temperature(tref)
• volumetric soil moisture, site 3(sm3)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• Dummy altitude for Zeb(alt)
• Soil heat capacity 3(cs3)
• volumetric soil moisture, site 4(sm4)
• volumetric soil moisture, site 2(sm2)
• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• Soil heat capacity 2(cs2)
• soil heat flow, site 3(g3)
• lat(lat)
• Soil heat capacity 5(cs5)
• h(h)
• base time(base_time)
• wind direction (relative to true north)(wind_d)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 0-5 cm integrated soil temperature, site 2(ts2)
• Temperature of bottom humidity sensor chamber(thum_bot)
• 5 cm soil heat flow, site 4(shf4)
• lon(lon)
• latent heat flux(e)
• 0-5 cm integrated soil temperature, site 2(ts1)
• Soil heat capacity 1(cs1)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• scalar wind speed(wind_s)
• 5 cm soil heat flow, site 3(shf3)
• bottom air temperature(tair_bot)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)

SGP/EBBR/E26 - Wind Speed Cups Frozen

Freezing rain, snow, and below freezing conditions during the night of 10-11
November 1995 resulted in the wind speed sensor cups becoming frozen in a
stopped state at E26, Cement, OK on early 11 November 1995.  When temperatures
rose to almost freezing under cloudless skies later in the day, the ice thawed
and the cups were free to turn again.

Measurements affected by the stalled wind speed sensor include:

5 minute:  wind_s, res_ws

15 minute: wind_s

30 minute: wind_s, res_ws

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

SGP/EBBR/E26 - Wind Speed Cups Frozen

Freezing rain, snow, and below freezing conditions during 18-19 January
1995 caused the wind speed sensor cups to freeze in a stopped state at E26,
Cement, OK on 18 January 1995.  When temperatures rose to above freezing on
19 January, the ice thawed and the cups turned freely again.

Measurements affected by the stalled wind speed sensor include:

5 minute:  wind_s, res_ws

15 minute: wind_s

30 minute: wind_s, res_ws

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

SGP/EBBR/E22 - Wind Speed Cups Frozen

Freezing rain, snow, and below freezing conditions during 18-19 January
1995 caused the wind speed sensor cups to freeze in a stopped state at E22,
Cordell, OK on 18 January 1995.  When temperatures rose to above freezing on
19 January, the ice thawed and the cups turned freely again.

Measurements affected by the stalled wind speed sensor include:

5 minute:  wind_s, res_ws
15 minute: wind_s
30 minute: wind_s, res_ws

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• scalar wind speed(wind_s)

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

SGP/EBBR/E26 - Right Tair Offscale

On 26 and 31 December 1995 at E26, Cement, OK EBBR the right thermocouple
output went offscale.  The cause for this is unknown and the sensor recovered
fully.  Five minute data would need to be inspected during the periods
above for incorrect five minute values.  Site Operations has been asked to
check the sensor connections.  Incorrect data for the period indicated includes:

5 minute:   tair_top, tair_bot

15 minute:  tair_r

30 minute:  tair_top, tair_bot, bowen, h, e

• Right air temperature(tair_r)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)

• top air temperature(tair_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• bottom air temperature(tair_bot)
• latent heat flux(e)

SGP/EBBR/E26 - Right tair Offscale

On five days in January 1996 at E26, Cement, OK EBBR the right thermocouple
output went offscale.  The cause for this is unknown, although poor probe
connections are common.  Site Operation personnel tightened the probe
connections in mid January.

Five minute data would need to be inspected during the periods
indicated for incorrect five minute values.  Incorrect data for the period
indicated includes:

5 minute:   tair_top, tair_bot

15 minute:  tair_r

30 minute:  tair_top, tair_bot, bowen, h, e

The data are not recoverable from other measurements.

• Right air temperature(tair_r)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)

• top air temperature(tair_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• bottom air temperature(tair_bot)
• latent heat flux(e)

SGP/EBBR/E22 - Reprocess: Soil Heat Flow Sensor 4 Incorrect Data

Soil heat flow sensor #4 periodically output incorrect values during the 
period indicated.  The output often indicated large negative heat flow.  The
sensor was replaced on March 19, 1996, which corrected the problem.  The data 
affected (and thus incorrect) includes:

15 minute: mv_hft4
30 minute: shf4, c_shf4, g4, ave_shf, e, h.

The dates and times (GMT) of incorrect values are listed below.  Only half 
hour data times are listed.  

01/31/96  1500 (shf4 only)
02/10/96  0230-1300, 1400-1600
02/11/96  0100-0900, 1030-1400, 1730-2330
02/12/96  0000-0100, 1200-1230, 1600-1830
02/13/96  0130-0230, 1430, 1600-1700
02/14/96  0130-0230
02/23/96  0330-0530, 1200-2330
02/24/96  0000-0200
02/29/96  0000
03/03/96  0130-0200, 1500-1830
03/04/96  0100-0230, 0400-1530
03/05/96  1200-1430, 1630-1830
03/06/96  0200-2330
03/07/96  0000-0430, 2030-2130, 2330
03/08/96  0330-1730
03/10/96  0400-1130
03/12/96  0400-1130, 1430-1600
03/13/96  0830-1130
03/15/96  0400-2200
03/16/96  0400-0830, 1030-1200, 1500-1700
03/17/96  0630, 0730-2030
03/18/96  0300-1730
03/19/96  0130-2330
03/20/96  0000-1430, 1700-1830
03/21/96  0230
03/22/96  0400, 1600-1700
03/23/96  0400-1930
03/24/96  2200-2330
03/25/96  0000-1500
03/27/96  1800-2000

The latent and sensible heat fluxes can be recalculated by using only soil
heat flows 1, 2, 3, and 5 to calculate the average soil heat flow,

ave_shf = (g1 + g2 + g3 + g5)/4
e = -(q + ave_shf)/(1 + bowen)
h = -(e + ave_shf + q)

• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• h(h)
• latent heat flux(e)
• soil heat flow, site 4(g4)
• 5 cm soil heat flow, site 4(shf4)
• average surface soil heat flow(ave_shf)

• Soil heat flow 4(mv_hft4)

SGP/EBBR/E26 - Right Air Temperature Malfunction

The right air temperature probe malfunctioned and produced incorrect data 
during the period of time indicated above.  The cause of the problem is 
unknown.  The right air temperature probe appears to be working well presently.

The malfunction of the right air temperature probe results in incorrect Bowen 
ratio, sensible heat flux, and latent heat flux during the period above. 

The data values that are affected are:

5 minute:  tair_top, tair_bot

15 minute: tair_r (1715-1830 GMT values)

30 minute: tair_top, tair_bot, bowen, e, and h (1730-1830 GMT values)

• Right air temperature(tair_r)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)

• top air temperature(tair_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• bottom air temperature(tair_bot)
• latent heat flux(e)

SGP/EBBR/E26 - Right Air Temp Malfunction

The right air temperature probe malfunctioned and produced incorrect data 
during the period of time indicated above.  The probe (S/N 92013) was 
replaced by Site Operations on 23 April 1996 at 2115 GMT with S/N 92002.  

The malfunction of the right air temperature probe results in incorrect Bowen 
ratio, sensible heat flux, and latent heat flux during the period indicated. 

The data values that are affected are:

5 minute:  tair_top, tair_bot

15 minute: tair_r (1515-2115 GMT values)

30 minute: tair_top, tair_bot, bowen, e, and h (1530-2130 GMT values)

• Right air temperature(tair_r)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)

• top air temperature(tair_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• bottom air temperature(tair_bot)
• latent heat flux(e)

SGP/EBBR/E20 - Temperature/RH Probes Malfunction and Replacement

Beginning on approximately October 1, 1996 the calibration of the temperature 
sensor in one or both T/RH probes began to drift; temperatures started to 
drift higher than the thermocouple probes.  This drift caused the upper and 
lower temperatures measured by the T/RH probe to be 2 to 10 degrees C greater 
than the thermocouple probes.  Comparison with adjacent EBBR sites shows 
that the thermocouples were measuring properly.  The problem affected the vapor 
pressure outputs primarily, making them as much as 1 kPa greater than they 
should be (vapor pressure is calculated from probe temperature and relative 
humidity).  The effect on sensible and latent heat fluxes was negligible, 
although latent heat flux may be overestimated by about 5% presently and 
sensible heat flux underestimated by approximately the same percentage.


Site operations replaced the T/RH probes on 8 May 1996; the new probes are 
performing well. The serial numbers of replaced probes are: Left 632415, 
Right 632356.  New probe serial numbers are: Left 460428, Right 460412.

• null(Raw data stream - documentation not supported)

• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom vapor pressure(vp_bot)
• latent heat flux(e)
• top vapor pressure(vp_top)
• h(h)

• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)

• Temperature of right humidity sensor chamber(rr_thum_r)
• Temperature of left humidity sensor chamber(rr_thum_l)

SGP/EBBR/E26 - 3-month check

During EBBR 3 month checks the Automatic Exchange Mechanism is disabled
(reflected by home signals near zero) so that the two aspirator units can be
placed at the same height.  The measurements during this period, at least,
do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h),
or latent heat flux (e), nor do the air temperature and relative humidity
measurements indicate gradients.  Checks performed before or after the AEM
is disabled also lead to some incorrect data.  The period of incorrect
data for the EBBR is listed; data times affected do not include the
beginning time and do include the ending time (data files are denoted by
the end time).

• Temperature of right humidity sensor chamber(rr_thum_r)
• Left air temperature(tair_l)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Right relative humidity(mv_hum_r)
• Left relative humidity(mv_hum_l)
• Right air temperature(tair_r)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)

• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top vapor pressure(vp_top)
• top air temperature(tair_top)
• Top humidity(hum_top)
• Temperature of the top humidity chamber(thum_top)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• h(h)
• bottom air temperature(tair_bot)
• latent heat flux(e)

SGP/EBBR/E20 - 3-month check

During EBBR 3-month checks the Automatic Exchange Mechanism is disabled
(reflected by home signals near zero) so that the two aspirator units can be
placed at the same height.  The measurements during this period, at least,
do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h),
or latent heat flux (e), nor do the air temperature and relative humidity
measurements indicate gradients.  Checks performed before or after the AEM
is disabled also lead to some incorrect data.  The period of incorrect
data for the EBBR is listed above; data times affected do not include the
beginning time and do include the ending time (data files are denoted by
the end time).

• Bottom humidity(hum_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Top humidity(hum_top)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom vapor pressure(vp_bot)
• top air temperature(tair_top)
• latent heat flux(e)
• top vapor pressure(vp_top)
• h(h)
• bottom air temperature(tair_bot)

• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• top air temperature(tair_top)
• bottom air temperature(tair_bot)
• Top humidity(hum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)

SGP/EBBR/E22 - 3-month check

During EBBR 3 month checks the Automatic Exchange Mechanism is disabled
(reflected by home signals near zero) so that the two aspirator units can be
placed at the same height.  The measurements during this period, at least,
do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h),
or latent heat flux (e), nor do the air temperature and relative humidity
measurements indicate gradients.  Checks performed before or after the AEM
is disabled also lead to some incorrect data.  The period of incorrect
data for the EBBR is listed in the times indicated; data times affected 
do not include the beginning time and do include the ending time 
(data files are denoted by the end time).

• bottom air temperature(tair_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Bottom humidity(hum_bot)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Top humidity(hum_top)
• bottom vapor pressure(vp_bot)
• latent heat flux(e)
• Temperature of the top humidity chamber(thum_top)
• top air temperature(tair_top)
• h(h)

• Right relative humidity(mv_hum_r)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Left air temperature(tair_l)
• Left relative humidity(mv_hum_l)
• Right air temperature(tair_r)
• Temperature of right humidity sensor chamber(rr_thum_r)

• top air temperature(tair_top)
• Bottom humidity(hum_bot)
• Top humidity(hum_top)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom vapor pressure(vp_bot)

SGP/EBBR/E26 - Wind Direction Sensor Failure

Wind Direction and resultant wind speed data for the period listed above 
is incorrect.  Wind direction would not record outside 0 to 20 degrees.  
This is a common malfunction in this style of wind direction sensor.  
The sensor was replaced on 13 August 1996.  The old sensor S/N was K3038
and new sensor is S/N K3033.  The affected data values are:

 5 minute: wind_d, sigma_wd, res_ws

15 minute: mv_wind_d

30 minute: wind_d, sigma_wd, res_ws

• Wind direction (relative to true north)(mv_wind_d)

• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• vector wind speed(res_ws)
• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

SGP/EBBR/E26 - Right Air Temperature Malfunction

The right air temperature probe malfunctioned again and produced 
incorrect data (outside of range) during some of the period indicated above.  
The cause of the problem is unknown.  On 18 June site operations tightened the
connection to the J-panel and repaired a broken aspirator fan wire.  However, 
incorrect data resumed shortly after site operations left the site.  Data 
continued to be incorrect during some times through July 5.  No incorrect data 
was recorded from July 6 through July 17.  The EBBR unit was changed out on 
July 17, 1996.

The times of incorrect right air temperatures are easy to recognize from 
the EBBR data, so the precise times of incorrect data are not enumerated 
here.  Typically, the top and bottom air temperature is out of range, 
resulting in the sensible heat flux being zero.

The malfunction of the right air temperature probe results in incorrect Bowen 
ratio, sensible heat flux, and latent heat flux. 

The data values that are affected are:

5 minute:  tair_top, tair_bot

15 minute: tair_r 

30 minute: tair_top, tair_bot, bowen, e, and h

• Right air temperature(tair_r)

• bottom air temperature(tair_bot)
• top air temperature(tair_top)

• top air temperature(tair_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• bottom air temperature(tair_bot)
• latent heat flux(e)

SGP/EBBR/E20 - Incorrect Data from Left Humidity Probe

The left humidity probe output started drifting upward at 2145 GMT on 
May 8, 1996 and went offscale (over 105%) at 0200 GMT on May 9, 1996.  The 
output settled at approximately 113% and remained there until the probe was 
replaced on June 19, 1996.  The first correct 15 minute values were at 1630 
GMT on June 19 and the first correct 30 minute values were at 1700 GMT.
During the period of incorrect left probe RH data, the following values 
were incorrect:

15 minute:  mv_hum_l

30 minute: hum_top, hum_bot, vp_top, vp_bot, h, e, bowen.

• latent heat flux(e)
• Bottom humidity(hum_bot)
• top vapor pressure(vp_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Top humidity(hum_top)
• h(h)
• bottom vapor pressure(vp_bot)

• Left relative humidity(mv_hum_l)

SGP/EBBR/E4 - EBBR 3 Month Checks - 10 EFs

During EBBR 3 month checks the Automatic Exchange Mechanism is disabled 
(reflected by home signals near zero) so that the two aspirator units
can be placed at the same height.  The measurements during these periods 
do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), 
or latent heat flux (e), nor do the air temperature and relative humidity 
measurements indicate correct gradients.  Checks performed before or after the 
AEM is disabled also lead to some incorrect data.  Incorrect 5, 15 minute and 
half hour data occurs for periods indicated.

• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• top vapor pressure(vp_top)
• Top humidity(hum_top)
• bottom air temperature(tair_bot)

• Left air temperature(tair_l)
• Left relative humidity(mv_hum_l)
• Right relative humidity(mv_hum_r)
• Right air temperature(tair_r)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Temperature of left humidity sensor chamber(rr_thum_l)

• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)
• Temperature of the top humidity chamber(thum_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)
• Bottom humidity(hum_bot)
• top air temperature(tair_top)
• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)
• latent heat flux(e)

SGP/EBBR/E22 - Annual Calibration Changeout

On 6 November 1996 the EBBR changeout for annual calibration occurred at 
E22, Cordell, OK.  SEBS unit 7 was removed and unit 3 was installed.  Between 
1300 and 2300 GMT no data or incorrect data was collected; most of the data 
is missing.  Data for half hour 1930 GMT on 7 November is incorrect; 3 month 
calibration checks were being performed.

• Soil heat capacity 1(cs1)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Reference Thermistor Temperature(tref)
• top vapor pressure(vp_top)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• wind direction (relative to true north)(wind_d)
• Temperature of bottom humidity sensor chamber(thum_bot)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• Dummy altitude for Zeb(alt)
• Soil heat capacity 5(cs5)
• Temperature of the top humidity chamber(thum_top)
• volumetric soil moisture, site 5(sm5)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• net radiation(q)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• volumetric soil moisture, site 4(sm4)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• 0-5 cm integrated soil temperature, site 5(ts5)
• lat(lat)
• volumetric soil moisture, site 1(sm1)
• 5 cm soil heat flow, site 2(shf2)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 5 cm soil heat flow, site 5(shf5)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• base time(base_time)
• bottom vapor pressure(vp_bot)
• latent heat flux(e)
• 0-5 cm integrated soil temperature, site 2(ts1)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• lon(lon)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Retrieved pressure profile(pres)
• scalar wind speed(wind_s)
• average surface soil heat flow(ave_shf)
• Bottom humidity(hum_bot)
• 5 cm soil heat flow, site 3(shf3)
• soil heat flow, site 3(g3)
• soil heat flow, site 2(g2)
• Time offset of tweaks from base_time(time_offset)
• Top humidity(hum_top)
• 0-5 cm integrated soil temperature, site 4(ts4)
• soil heat flow, site 1(g1)
• h(h)
• volumetric soil moisture, site 3(sm3)
• 5 cm soil heat flow, site 4(shf4)
• bottom air temperature(tair_bot)
• 5 cm soil heat flow, site 1(shf1)
• soil heat flow, site 5(g5)
• Soil heat capacity 4(cs4)
• vector wind speed(res_ws)
• volumetric soil moisture, site 2(sm2)
• 0-5 cm integrated soil temperature, site 3(ts3)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• soil heat flow, site 4(g4)
• top air temperature(tair_top)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• Soil heat capacity 3(cs3)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• Soil heat capacity 2(cs2)

• Home signal(mv_home)
• Soil temperature 2(rr_ts2)
• Dummy altitude for Zeb(alt)
• lat(lat)
• Soil temperature 1(rr_ts1)
• Soil heat flow 4(mv_hft4)
• Soil temperature 5(rr_ts5)
• lon(lon)
• base time(base_time)
• scalar wind speed(wind_s)
• Left air temperature(tair_l)
• Wind direction (relative to true north)(mv_wind_d)
• Soil moisture 1(r_sm1)
• Time offset of tweaks from base_time(time_offset)
• Soil heat flow 1(mv_hft1)
• Right relative humidity(mv_hum_r)
• Soil moisture 5(r_sm5)
• Net radiation(mv_q)
• Soil moisture 4(r_sm4)
• Left relative humidity(mv_hum_l)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Soil heat flow 3(mv_hft3)
• Soil moisture 3(r_sm3)
• Battery(bat)
• Soil temperature 3(rr_ts3)
• Signature(signature)
• Reference temperature(rr_tref)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Soil heat flow 2(mv_hft2)
• Soil moisture 2(r_sm2)
• Soil heat flow 5(mv_hft5)
• Soil temperature 4(rr_ts4)
• Right air temperature(tair_r)
• Atmospheric pressure(mv_pres)

• net radiation(q)
• scalar wind speed(wind_s)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)
• Temperature of the top humidity chamber(thum_top)
• Reference Thermistor Temperature(tref)
• Dummy altitude for Zeb(alt)
• Top humidity(hum_top)
• lat(lat)
• Time offset of tweaks from base_time(time_offset)
• Retrieved pressure profile(pres)
• Home signal(home)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom air temperature(tair_bot)
• vector wind speed(res_ws)
• top air temperature(tair_top)
• base time(base_time)
• Bottom humidity(hum_bot)
• lon(lon)

SGP/EBBR/E26 - Annual Calibration Changeout

On 16 November 1996 the EBBR changeout for annual calibration occurred at 
E26, Cement, OK.  SEBS unit 2 was removed and unit 8 was installed.  Between 
1500 and 2230 GMT no data or incorrect data was collected; most of the data 
is missing.  3 month calibration checks were being performed.

• Soil temperature 3(rr_ts3)
• Battery(bat)
• Soil temperature 4(rr_ts4)
• lat(lat)
• Signature(signature)
• Soil moisture 5(r_sm5)
• Soil heat flow 5(mv_hft5)
• base time(base_time)
• Time offset of tweaks from base_time(time_offset)
• Soil moisture 4(r_sm4)
• Net radiation(mv_q)
• Reference temperature(rr_tref)
• Soil temperature 5(rr_ts5)
• Right air temperature(tair_r)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Atmospheric pressure(mv_pres)
• Soil heat flow 4(mv_hft4)
• scalar wind speed(wind_s)
• Right relative humidity(mv_hum_r)
• Soil moisture 1(r_sm1)
• Left relative humidity(mv_hum_l)
• Soil heat flow 2(mv_hft2)
• Dummy altitude for Zeb(alt)
• Soil moisture 2(r_sm2)
• Soil heat flow 1(mv_hft1)
• Soil temperature 2(rr_ts2)
• Soil moisture 3(r_sm3)
• Wind direction (relative to true north)(mv_wind_d)
• Left air temperature(tair_l)
• Home signal(mv_home)
• Soil temperature 1(rr_ts1)
• Soil heat flow 3(mv_hft3)
• lon(lon)
• Temperature of left humidity sensor chamber(rr_thum_l)

• Time offset of tweaks from base_time(time_offset)
• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Home signal(home)
• wind direction (relative to true north)(wind_d)
• top vapor pressure(vp_top)
• lat(lat)
• lon(lon)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• scalar wind speed(wind_s)
• Temperature of the top humidity chamber(thum_top)
• net radiation(q)
• Retrieved pressure profile(pres)
• vector wind speed(res_ws)
• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)
• Dummy altitude for Zeb(alt)
• base time(base_time)
• Bottom humidity(hum_bot)
• Reference Thermistor Temperature(tref)

• volumetric soil moisture, site 1(sm1)
• 0-5 cm integrated soil temperature, site 3(ts3)
• soil heat flow, site 2(g2)
• volumetric soil moisture, site 4(sm4)
• Dummy altitude for Zeb(alt)
• 5 cm soil heat flow, site 2(shf2)
• base time(base_time)
• Reference Thermistor Temperature(tref)
• 5 cm soil heat flow, site 5(shf5)
• vector wind speed(res_ws)
• soil heat flow, site 1(g1)
• volumetric soil moisture, site 3(sm3)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• 0-5 cm integrated soil temperature, site 2(ts1)
• soil heat flow, site 5(g5)
• volumetric soil moisture, site 2(sm2)
• 5 cm soil heat flow, site 1(shf1)
• Retrieved pressure profile(pres)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• Top humidity(hum_top)
• average surface soil heat flow(ave_shf)
• Temperature of the top humidity chamber(thum_top)
• net radiation(q)
• scalar wind speed(wind_s)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• lat(lat)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• 0-5 cm integrated soil temperature, site 5(ts5)
• top air temperature(tair_top)
• soil heat flow, site 4(g4)
• Soil heat capacity 5(cs5)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• bottom vapor pressure(vp_bot)
• Soil heat capacity 3(cs3)
• lon(lon)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Soil heat capacity 2(cs2)
• Time offset of tweaks from base_time(time_offset)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• bottom air temperature(tair_bot)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• top vapor pressure(vp_top)
• 5 cm soil heat flow, site 4(shf4)
• wind direction (relative to true north)(wind_d)
• 5 cm soil heat flow, site 3(shf3)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• Bottom humidity(hum_bot)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• volumetric soil moisture, site 5(sm5)
• 0-5 cm integrated soil temperature, site 4(ts4)
• Soil heat capacity 1(cs1)
• h(h)
• latent heat flux(e)
• Soil heat capacity 4(cs4)

SGP/EBBR/E26 - Wind Direction Sensor Failure

Wind Direction and resultant wind speed data for much of the period listed 
above is incorrect.  Wind directions of 135, 0, or 360 would continue for 
extended periods.  This behavior is indicative of a failed sensor.    
This is a common malfunction in this style of wind direction sensor.  
A work request has been submitted to site operations for replacement of the 
sensor.  All values of 135, 0, and 360 should be considered to be 
incorrect during the period above.  Furthermore, more incorrect data may 
occur until the sensor is replaced (by 6 December).

The affected data values are:

 5 minute: wind_d, sigma_wd, res_ws

15 minute: mv_wind_d

30 minute: wind_d, sigma_wd, res_ws

• Wind direction (relative to true north)(mv_wind_d)

• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• vector wind speed(res_ws)
• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

SGP/EBBR/E20 - Wind Speed Cups Frozen

Freezing rain, snow, and below freezing conditions during 24 November 
1996 caused the wind speed sensor cups to freeze in a stopped state at E20, 
Meeker, OK.  On 25 November, the cups broke free of the ice and turned freely 
again. 

Measurements affected by the stalled wind speed sensor include:

5 minute:  wind_s, res_ws

15 minute: wind_s

30 minute: wind_s, res_ws

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• vector wind speed(res_ws)
• scalar wind speed(wind_s)

• scalar wind speed(wind_s)

SGP/EBBR/E26 - Wind Direction Sensor Failure

Wind Direction and Sigma of Wind Direction data for the period listed  
is incorrect.  The wind direction sensor began to malfunction on 6 November, 
with the characteristic constant 135 degree output.  At other times the output
remained a nearly constant 230 to 240 degrees.  On 16 November at 1819 GMT site
operations replaced sensor  S/N 3033 with S/N 3036.  Apparently they left it 
aligned at north when they left the EF; output for the next few days was 0 or 
360 degrees, until they returned on 19 November at 1825 GMT and gave the vane 
it's freedom.

Affected fields are:

5 minute: wind_d, sigma_wd

15 minute: mv_wind_d

30 minute: wind_d, sigma_wd

• Wind direction (relative to true north)(mv_wind_d)

• wind direction (relative to true north)(wind_d)
• vector wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• vector wind speed(res_ws)
• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

SGP/EBBR/E26 - Reprocess: E26 Soil Heat Flow Sensor 1 Replacement

Apparently, during installation of the present system on 17 July 1996, soil 
heat flow sensor #4 was intentionally placed upside down in the soil to 
produce the correct sign of flux. The leads from the sensor must have been
connected with the wrong polarity.  On 3 December 1996 site operations 
corrected some wiring problems and reconnected soil heat flow sensor #4 
according to the proper color code; this caused the sign of the soil heat 
flow from that sensor to then be opposite of the other four sensors.  All 
data from sensor #4 is the wrong sign during the period listed above.

On 17 June 1997 site operations removed the sensor and installed it with 
the correct side up, fixing the problem.

The result of this problem was a decrease of reported average soil heat flow of 
approximately 40%.  This translates into a 0 to 20% error in latent and 
sensible heat fluxes (soil heat flow is rarely more than 50% of net radiation,
upon which the Bowen ratio calculation depends).  Therefore, sensible and 
latent heat fluxes were typically overestimated by about 10% during the 
daytime.  This is of the same magnitude as the EBBR system/technique error.

The following data values were affected for the period listed 
above: 

15 minute: mv_hft4
30 minute: shf4, c_shf4, g4, ave_shf, e, h

The latent and sensible heat fluxes can be recalculated by using only soil
heat flows 1, 2, 3, and 5 to calculate the average soil heat flow,

ave_shf = (g1 + g2 + g3 + g5)/4

e = -(q + ave_shf)/(1 + bowen)

h = -(e + ave_shf + q).

• Soil heat flow 4(mv_hft4)

• soil heat flow, site 4(g4)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• average surface soil heat flow(ave_shf)
• h(h)
• latent heat flux(e)
• 5 cm soil heat flow, site 4(shf4)

SGP/EBBR/E22 - Reprocess: E22 Soil Heat Flow Sensor # 5 Incorrect Data

Soil heat flow sensor #5 frequently produced large negative (and incorrect)
values during the period above.  The problem ended during a PM visit by 
site operations.  However, there is no documentation by Site Operations in
the instrumentation report or corrective maintenance report that Site
Operations personnel took action to correct the problem.  Site Operations 
also told me that they have no record of any changes or corrective 
maintenance.  Apparently, something fortuitous happened during the PM to 
correct the problem.  The start date and time of the problem cannot be 
determined exactly, but it did begin during a period of missing data from 
Feb. 14-25, 1997.

Values affected (and thus incorrect) include:

15 minute: mv_hft5
30 minute: shf5, c_shf5, g5, ave_shf, e, h.

The latent and sensible heat fluxes can be recalculated by using only soil
heat flows 1, 2, 3, and 4 to calculate the average soil heat flow,

ave_shf = (g1 + g2 + g3 + g4)/4

e = -(q + ave_shf)/(1 + bowen)

h = -(e + ave_shf + q)

• h(h)
• latent heat flux(e)
• 5 cm soil heat flow, site 5(shf5)
• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)

• Soil heat flow 5(mv_hft5)

SGP/EBBR/E20 - Reprocess: E20 Soil Probes #3 Cables Cut

The cables going to #3 soil temperature, moisture, and heat flow probes 
were cut by a mower on 11 June 1997 and were repaired on 16 July 1997.  
Data for the temperature probe was offscale, for the soil moisture probe 
was a constant 10.1 (close to the actual), and for the soil heat flow 
was large negative during the period. 

The following are the data quantities that were affected:

15 minute: rr_ts3, mv_hft3, r_sm3

30 minute: ts3, ces3, shf3, c_shf3, cs3, g3, ave_shf, e, h

Sensible, latent, and soil heat fluxes can be recalculated using the 
values from probes 1, 2, 4, and 5, as follows.

ave_shf = (g1 + g2 + g4 + g5)/4

e = -(q + ave_shf)/(1 +bowen)

h = -(e + ave_shf +q)

• latent heat flux(e)
• soil heat flow, site 3(g3)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• Soil heat capacity 3(cs3)
• h(h)
• 5 cm soil heat flow, site 3(shf3)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• average surface soil heat flow(ave_shf)
• 0-5 cm integrated soil temperature, site 3(ts3)

• Soil temperature 3(rr_ts3)
• Soil moisture 3(r_sm3)
• Soil heat flow 3(mv_hft3)

SGP/EBBR/E22 - Right Aspirator Unit Stolen

On 13 June 1997, vandals stole the right AEM aspirator unit, including the
thermocouple and T/RH probe inside.  These were replaced on 16 July 1997.

Incorrect data fields during the period above are:

5 minute:  tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, 
vp_top, vp_bot

15 minute: rr_thum_r, mv_hum_r, tair_r

30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, 
vp_top, vp_bot, bowen, e, h

• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)
• bottom air temperature(tair_bot)
• latent heat flux(e)
• Temperature of the top humidity chamber(thum_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top air temperature(tair_top)
• Bottom humidity(hum_bot)
• top vapor pressure(vp_top)
• h(h)
• Temperature of bottom humidity sensor chamber(thum_bot)

• Right relative humidity(mv_hum_r)
• Right air temperature(tair_r)
• Temperature of right humidity sensor chamber(rr_thum_r)