SGP/SONDE/C1 - Mixed use of RS92-SGP and RS92-KL radiosondes

Because of a manufacturer's production problem, we will be using both RS92-SGP (GPS 
windfinding and RS92-KL (Loran windfinding) radiosondes at the SGP/CF starting February 10, 
2006.  The radiosonde type used for the each sounding may be determined by looking the 
metadata variable "launch_status" in the netCDF data files.

• lon(lon)
• U-component(u_wind)
• Mean Wind Speed(wspd)
• V-component(v_wind)
• lat(lat)
• Wind Direction(deg)
• Wind Status(wstat)

SGP/EBBR/E27 - Sensible and Latent Heat Fluxes Incorrect

The left T/RH probe temperature sensor was spiking some of the time during these periods. 
Therefore, sensible and latent heat fluxes were incorrect during parts of the periods as 
well.

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

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

• Temperature of left humidity sensor chamber(rr_thum_l)

SGP/EBBR/E13 - Left Air Temperature Incorrect - Fluxes Affected

The left air temperature was incorrect, thus the Bowen ratio and sensible and latent heat 
fluxes were incorrect also.

• Left air temperature(tair_l)

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

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

SGP/EBBR/E13 - Fluxes Incorrect, AEM Problems

The AEM did not function properly, thus sensible and latent heat fluxes were incorrect.

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

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

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

SGP/EBBR/E20 - Net Radiation, Fluxes Too Large

Net Radiation was way too large because of water in the bottom dome.
This resulted in the sensible and latent heat fluxes being too large also.

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

• net radiation(q)

SGP/SONDE/C1 - No Wind/Lat/Lon Data in Sonde Files

The wind finding hardware failed so that no wind or latitude/longitude data was collected 
on the launches for these days.

• lon(lon)
• U-component(u_wind)
• Mean Wind Speed(wspd)
• V-component(v_wind)
• lat(lat)
• Wind Status(wstat)

SGP/EBBR/E27 - Sensible, Latent, and Average Soil Heat Fluxes Sometimes Incorrect

The Soil Heat Flow #1 sensor kept going offscale.

Sensible and Latent heat fluxes and the ave_shf were affected and sometimes
incorrect.

• 5 cm soil heat flow, site 1(shf1)
• average surface soil heat flow(ave_shf)
• soil heat flow, site 1(g1)
• h(h)
• latent heat flux(e)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)

• Soil heat flow 1(mv_hft1)

SGP/EBBR/E27 - Low Battery Condition

A low battery condition caused most of the measurements to be incorrect.

• vector wind speed(res_ws)
• net radiation(q)
• Bottom humidity(hum_bot)
• Reference Thermistor Temperature(tref)
• Retrieved pressure profile(pres)
• Top humidity(hum_top)
• scalar wind speed(wind_s)
• Temperature of the top humidity chamber(thum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• wind direction (relative to true north)(wind_d)
• Home signal(home)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)
• time(time)
• top air temperature(tair_top)
• bottom vapor pressure(vp_bot)
• standard deviation of wind direction (sigma theta)(sigma_wd)

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

• Soil moisture 5(r_sm5)
• Reference temperature(rr_tref)
• Left air temperature(tair_l)
• Soil temperature 3(rr_ts3)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Soil temperature 4(rr_ts4)
• Soil moisture 2(r_sm2)
• scalar wind speed(wind_s)
• Soil temperature 5(rr_ts5)
• Right air temperature(tair_r)
• Soil moisture 3(r_sm3)
• Left relative humidity(mv_hum_l)
• Soil moisture 4(r_sm4)
• Soil heat flow 1(mv_hft1)
• Net radiation(mv_q)
• Soil heat flow 3(mv_hft3)
• Soil heat flow 4(mv_hft4)
• Soil heat flow 5(mv_hft5)
• Right relative humidity(mv_hum_r)
• Soil temperature 1(rr_ts1)
• Atmospheric pressure(mv_pres)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Soil moisture 1(r_sm1)
• Soil temperature 2(rr_ts2)
• Wind direction (relative to true north)(mv_wind_d)
• Soil heat flow 2(mv_hft2)
• Home signal(mv_home)

SGP/EBBR/E27 - Most Measurements Suspect

The wrong EBBR program was used at this site.  Therefore, most of the measurements are 
suspect.

Note: Mentor reports reprocessing will not correct this problem.

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

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

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

SGP/EBBR/E8 - Sensible and Latent Heat Fluxes and Net Radiation Incorrect

The net radiometer top dome was broken and water had gotten into it.

Sensible and latent heat fluxes and net radiation were therefore incorrect.

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

• net radiation(q)

• Net radiation(mv_q)

SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry

The output precision of the following variables was increased 20060928

alt  changed from 1m to 0.1m
dp   changed from 0.1degC to 0.01degC
pres changed from 0.1 hPa to 0.01 hPa
RH   changed from 1%RH to 0.01%RH
tdry changed from .1degC to 0.01degC

Note that the increase in precision does not necessarily imply an increase in accuracy.  
Users are cautioned to continue to use their best scientific judgement when using these or 
any other data.

• Surface dew point temperature(dp)
• Dry bulb temperature(tdry)
• Relative humidity inside the instrument enclosure(rh)
• Retrieved pressure profile(pres)
• Dummy altitude for Zeb(alt)

SGP/SMOS/E4 - Incorrect Offset for Wind Directon

An incorrect offset of 7 degrees was subtracted from the wind direction to correct for 
misalignment of the towers to true north. The wind direction data may be corrected but the 
vector averaged wind speed cannot. Subsequent audits have highlighted problems with past 
measurements of tower alignments.  All corrections to wind direction are being removed and 
Users are directed to view the Instrument Handbook for a table listing all tower 
alignment deviations from true north.  Users can adjust the data at their discretion.

• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)

• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)

SGP/SMOS/E7 - Incorrect Offset for Wind Directon

An incorrect offset of 6 degrees was subtracted from the wind direction to correct for 
misalignment of the towers to true north. The wind direction data may be corrected but the 
vector averaged wind speed cannot. Subsequent audits have highlighted problems with past 
measurements of tower alignments.  All corrections to wind direction are being removed and 
Users are directed to view the Instrument Handbook for a table listing all tower 
alignment deviations from true north.  Users can adjust the data at their discretion.

• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)

• Wind Speed (vector averaged)(wspd_va)
• Unit Vector Wind Direction(wdir)

SGP/SMOS/E27 - Incorrect Offset for Wind Directon

An incorrect offset of 7 degrees was added to the wind direction to
   correct for misalignment of the towers to true north. The wind direction data may be 
corrected but the vector averaged wind speed cannot. Subsequent audits have highlighted 
problems with past measurements of tower alignments.  All corrections to wind direction are 
being removed and Users are directed to view the Instrument Handbook for a table listing 
all tower alignment deviations from true north.  Users can adjust the data at their 
discretion.

• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)

• Unit Vector Wind Direction(wdir)
• Wind Speed (vector averaged)(wspd_va)