SGP/EBBR - EBBR E8 Left Air Temperature (thermocouple) Incorrect

The left air temperature (thermocouple) frequently went offscale, for an
unknown reason, thereby affecting many quantities.

The affected data are:

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

• Left air temperature(tair_l)

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

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

SGP/EBBR - EBBR E8 Wind Direction Incorrect

A malfunctioning wind direction sensor caused the wind direction 
measurement to be incorrect for the period.

The affected data are:

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

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

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

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

SGP/EBBR/E8 - Drop in atmospheric pressure

Beginning September 22, 1993, the atmospheric pressure sensor at the E8
EBBR began showing drops of as much as 5 kPa for about half a day.  These
could be easily seen in comparisons with the SMOS pressure sensor.  The
drops were diurnal and occurred during daytime, at the same time as other
quantities such as temperature, net radiation, and battery voltage were at
the highest levels of the day.  It is unclear what exactly caused this
situation.  Replacement of the Campbell multiplexer to which the pressure
sensor was connected caused the problem to go away.  The same multiplexer was
then used as a replacement for the other multiplexer in the E8 EBBR and has not
shown any odd behavior on the channel that previously served the pressure
sensor.  My conclusion is that there was poor electronic contact of the
pressure sensor to the multiplexer.

Affected pressure data can only be easily seen by comparison with SMOS
pressure data.  No EBBR data other than pressure is affected by the
pressure problem; calculations of specific heat at constant pressure (which
includes the term 1/(p-vp)) times other terms (including p-.378*vp) result in
a very small error in the resulting Bowen Ratio.  For example; assume a common
vapor pressure (vp) of 2.0 kPa, a common atmospheric pressure of 97.0
kPa, and a corrupted atmospheric pressure of 92.0 kPa.

       Uncorrupted                               Corrupted

   (97.0-.378*2.0)/(97.0-2.0) = 1.0131   (92.0-.378*2.0)/(92.0-2.0) = 1.0138

   1.0138/1.0131 = 1.00069  or  0.069% increase in the Bowen Ratio as a
                                       result of the corruption

Therefore, no correction to the quantities calculated using pressure is
warranted.

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

• Atmospheric pressure(mv_pres)

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

SGP/EBBR/E8 - Invalid data due to AEM fuse blow out at E8

On December 17, 1993, before 1100 GMT, the fuse in the AEM (Automatic
Exchange Mechanism) of Coldwater, KS (E8) EBBR blew out.  The AEM remained
nonfunctional until the fuse was replaced just before 1700 GMT on
December 29, 1993.  During the 1000 GMT half hour on December 17 the AEM
was hung up; this is clear from the home signal.  These situations 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

Bowen, h, and e can not be recalculated from the 15 minute and/or 5 minute data
since we cannot determine the position of the sensors on the AEM from the home
signal; home signal is near zero when there is no power to the AEM.

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

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

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

SGP/EBBR/E8 - Invalid wind data frozen sensor

On January 12, 1994 the EBBR wind speed sensor at E8, Coldwater, KS was
frozen to a stationary by ice.  Invalid data for the time period 1100 to
1630 GMT is:

30 minute: wind_s, res_ws

15 minute: wind_s

5 minute: wind_s, res_ws.

• scalar wind speed(wind_s)

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

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

SGP/EBBR/E8 - Invalid wind speed frozen sensor

On February 21, 1994 the EBBR wind speed sensor at E8, Coldwater, KS was
frozen to a stationary condition by ice.  Invalid data for the time period
indicated is:

30 minute: wind_s, res_ws

15 minute: wind_s

5 minute: wind_s, res_ws.

• scalar wind speed(wind_s)

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

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

SGP/EBBR/E8 - Battery Voltage Drop

Sometime after 0000 GMT on August 19, 1994 the cable from the solar panel
to the EBBR battery was broken, presumably the result of severe weather
that was in the area.  The result was that the battery could not be charged
by the solar panel, leading to a gradual reduction in battery voltage.  By
1730 GMT on the 19th, the battery voltage had dropped to 10.8 volts and at
about 1905 GMT had dropped too low to power the AEM.  Some thirty minute data
after 1900 GMT is therefore incorrect.  By 2000 GMT the voltage had dropped to
10.7 volts and was too low to properly power the barometric pressure sensor
(it's output dropped off from then on).  At 1530 GMT on August 24, 1994 the
solar panel connection to the battery was reestablished and normal data
acquisition resumed at 1600 GMT.

The last data file to be produced was apparently 0000 GMT (15 minute file)
on 20 August.

In an apparently related incident, soil temperature #3 skyrocketed in output
beginning at about 1815 GMT; the cause for this is unknown, but is probably
a result of the inability of the CR10 data logger to correctly measure the
sensor resistance.  By 1900 GMT this situation had caused elevated average
soil heat flux, which in turn affected calculated e and h.

Data fields that are incorrect for the time period listed, follow:

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

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

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

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

SGP/EBBR/E8 - Data Corruption and Loss

Data loss was experienced during the periods indicated for unknown reasons.
My understanding is that ingestion of the data failed for these periods
because the record length was shorter than it is supposed to be.
Site Operations personnel visited the site on September 7 and powered down
and then up, the EBBR, essentially causing a reload of the CR10 program.
All output locations had been -9999 or 0000 when they had arrived.  The
battery condition was normal.  Failure of a portion of the storage module
may be indicated; data sneakernetted from the storage module shows an
alternating sequence of two days, September 2 and 3 and then a stretch of
garbage characters.  No other days of data are found.  The portion of the
storage module memory that contained the program was not corrupted, as the
CR10 program compiled and ran properly when it was reloaded from the storage
module.  The data after the period above is reasonable.  The last part of
the storage module memory may be bad and perhaps in trying to access it
remotely multiple times the situation above resulted.

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

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

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

SGP/EBBR/E8 - Water in Net Radiometer

At some time previous to October 21, 1994, the top hemisphere of the net
radiometer of the EBBR at E8 was pierced, probably by migrating birds.  A
DQR was issued by me a couple of weeks ago indicating other extended
facilities at which this has happened.  Net radiometer data was correct
until October 21 at sometime between 0230 and 0300 GMT, when rain began to
enter the radiometer; the effect can be easily seen in the data.
Collection of 3/4 inch of water in the bottom hemisphere was not the only
consequence of the situation.  Unlike other net radiometers that have had
this experience, this one produced incorrect data during daylight hours as
well as during nightime hours until the water was removed, the sensor
dried, and the hemispheres were replaced on November 2, 1994.  During the
period listed above, the following data are incorrect and cannot be
recalculated:

5 minute:  q

15 minute: mv_q

30 minute: q, h, e

Science Team members or others using the data should recognize that the
flux data is not correct for this fairly lengthy time period.

• Net radiation(mv_q)

• net radiation(q)

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

SGP/EBBR/E8 - Frozen Wind Instruments

On December 6, 1994 a frontal system deposited freezing rain in central
Kansas that resulted in the EBBR wind instruments becoming frozen in place
at two extended facilities (E4 and E8) for a few days.  The direction and
speed instruments were frozen for slightly differents lengths of time.  The
times and fields to be indicated as incorrect are shown below (all 5, 15,
and 30 minute data measured during the periods, inclusive, is incorrect):

Wind Speed: 12/06/94 1200 GMT - 12/09/94 1530 GMT

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

Wind Direction: 12/06/94 1730 GMT - 12/07/94 1830 GMT

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

• scalar wind speed(wind_s)
• Wind direction (relative to true north)(mv_wind_d)

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

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

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/E8 - Frozen Wind Speed Instrument

On December 31, 1994 EBBR wind speed instrument froze in place from icing.
Wind speeds increased sufficiently on January 1, 1995 to break the
anemometer free.  The wind direction instrument was not affected.  The times
and fields that are incorrect are shown below.

5 minute:  wind_s, res_ws  12/31 1335 GMT - 1/1 1745 GMT
15 minute: wind_s          12/31 1345 GMT - 1/1 1745 GMT
30 minute: wind_s, res_ws  12/31 1400 GMT - 1/1 1800 GMT

• scalar wind speed(wind_s)

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

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

AEM Home 30 Values Low

DQR No:                               Platform: EBBR

Subject:  E8 EBBR AEM Home 30 Values Low

Date Submitted:  August 28, 1995
Submitted By:                         _x_  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      ___  Other _____________________________

For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.

Platform/Measurement: EBBR/AEM
        What level data: (raw,a0,a1,b1,c1 etc): a1 (5 and 30 minute)
                                                a0 (15 minute)

    What location was the data collected at: E8, Coldwater, KS

    Period of time in question
        Begin Date 08/18/95 to present

 Data should be labeled:
 ___  questionable                      ___  All data fields affected
 ___  incorrect                         ___  Only some data fields affected
 ___  wrong calibration
 _X_  others

 Discussion of Problem:

At least by August 18, 1995, the home 30 value intermittently dropped below
15, to typically a small negative number; 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.  I have requested site operations to
diagnose the cause of the problem on the next PM visit and hopefully correct
the problem.

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


Other observations/measurements impacted by this problem:


Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)

Flag data with this comment.

Data Processing Notes                Date

-------------------------------------------------------------------
END

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

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

SGP/EBBR/E8 - Home 30 Values Correct

Beginning 0630 GMT on August 18, 1995, the home 30 value intermittently
dropped below 15, to typically a small negative number; 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.

On September 15 at 1800 GMT the home 30 signal returned to normal and has
remained normal since then.  This occurred without the intervention of
site operations personnel.

• Exchange mechanism position indicator (15 to 30 min)(home_30)

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/E8 - 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).

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

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

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

SGP/EBBR/E8 - Annual Calibration Changeout

On 30 July 1996 the EBBR changeout for annual calibration occurred at 
E8, Coldwater, KS.  SEBS unit 5 was removed and unit 4 was installed.  Between 
1430 and 2100 GMT no data or incorrect data was collected; most of the data 
is missing.  Data for half hours 1400-1430 GMT on 31 July is incorrect; 3 month 
calibration checks were being performed.

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

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

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

SGP/EBBR/E8 - Incorrect Right Humidity Probe Temperature

The temperature portion of the right humidity probe produced incorrect 
values during the periods indicated.  No site operations intervention 
occurred to correct the problem.  The problem has not reoccurred.  The 
following data values are incorrect for the periods listed below:

15 minute: rr_thum_r

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

August
  5: 0200-2330
  6: 0000-2330
  7: 0000-1445
 11: 1045, 1200-1845, 2315-2330
 12: 0000-0200, 1130-1900, 2230-2330
 13: 0000-2330
 14: 0000-2200
 15: 1630-1730
 16: 2200-2330
 17: 0000-2330
 18: 0000-2330
 19: 0000-2330
 20: 0000-1945

• Temperature of right humidity sensor chamber(rr_thum_r)

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

SGP/EBBR/E8 - Reprocess: Soil Heat Flow Sensor 2 Incorrect Data

Soil heat flow sensor #2 periodically outputted incorrect values during the 
period indicated.  The output often indicated large negative heat flow.  
Problems with good connections of the sensor leads have caused this problem 
in the past.  However, no maintenance was performed before the problem 
ceased on 15 July 1996.  No data is available for 20-27 and 29 July, so it is 
not known if the problem occurred during that time.

The data affected (and thus incorrect) includes:

15 minute: mv_hft2
30 minute: shf2, c_shf2, g2, ave_shf, e, h.

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

06/19/96  0230, 0800-1000
06/30/96  0230-1530, 2130-2330
07/01/96  0100-0830
07/02/96  0400, 0500-1500
07/03/96  0130-0400, 1430-1530
07/04/96  0200-0230
07/05/96  0030, 0230

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

ave_shf = (g1 + g3 + g4 + g5)/4

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

h = -(e + ave_shf + q)

• Soil heat flow 2(mv_hft2)

• soil heat flow, site 2(g2)
• average surface soil heat flow(ave_shf)
• latent heat flux(e)
• 5 cm soil heat flow, site 2(shf2)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)

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/E8 - Incorrect Soil Moisture #1

Soil Moisture probe #1 went offscale at these half hour times, for an unknown 
reason. This problem may reoccur, and at present is extremely intermittent.  
A work request has been submitted to site operations to check the soil and 
electrical contacts of the probe.  Affected data values are:

15 minute: r_sm1

30 minute: sm1, c_shf1, ces1, cs1, g1, ave_shf, e, h

• Soil moisture 1(r_sm1)

• average surface soil heat flow(ave_shf)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• volumetric soil moisture, site 1(sm1)
• latent heat flux(e)
• h(h)
• soil heat flow, site 1(g1)
• Soil heat capacity 1(cs1)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)

SGP/EBBR/E8 - Incorrect Soil Moisture #2, Soil Temperature #2

Soil Moisture probe #2 and soil temperature probe #2 went offscale at times 
soon after installation of a new EBBR unit at E8.  The problem may have 
been poor soil contact to the probes or poor electrical contact at the j-
panel.  No site operation intervention occurred to correct the problem; the 
problem has not reoccurred since 15 October 1996.  Affected data values were:

15 minute: r_sm2, rr_ts2

30 minute: sm2, ts2, c_shf2, ces2, cs2, g2, ave_shf, e, h

The affected times (GMT) and dates are listed below:

Aug 
  3: 0300-0830, 1400-1700, 2030-2100 
  5: 0230-2330
  6: 0000-2330
  7: 0000-1430
Sep 
 20: 1030-1800, 2130, 2230-2330
 21: 1530, 2330
 22: 0000-0130, 0530-2330
 23: 0000-0130, 0400-2330
 24: 0000-2330
 25: 0000-2330
 26: 0000-0700, 1900-2030
 27: 0100-2330
 28: 0000-2330
 29: 0000-2330
 30: 0000-1930, 2130-2330
Oct
  1: 0000-2330
  2: 0000-2330
  3: 0000-2330
  4: 0000-2330
  5: 0000-2330
  6: 0000-2330
  7: 0000-0530, 1400-1830, 2000-2330
  8: 0000-2330
  9: 0000-2330
 10: 0000-2330
 11: 0000-2330
 12: 0000-2330
 13: 0000-2330
 14: 0000-2330
 15: 0000-1900

• Soil temperature 2(rr_ts2)
• Soil moisture 2(r_sm2)

• 0-5 cm integrated soil temperature, site 2(ts2)
• volumetric soil moisture, site 2(sm2)
• soil heat flow, site 2(g2)
• average surface soil heat flow(ave_shf)
• latent heat flux(e)
• Soil heat capacity 2(cs2)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• 0-5 cm change in soil heat storage with time, site 2(ces2)

SGP/EBBR/E8 - Incorrect Soil Temperature #s 1 and 2

Soil temperature probes #1 and #2 went offscale at times for many months.
Replacement probes were not available until recently.  The probes were 
replaced on 16 June, 1997 at 2200 GMT.

Affected data values were:

15 minute: r_sm1, r_sm2, rr_ts1, rr_ts2

30 minute: sm1, sm2, ts1, ts2, c_shf1, c_shf2, ces1, ces2, 
cs1, cs2, g1, g2, ave_shf, e, h

• Soil temperature 2(rr_ts2)
• Soil moisture 2(r_sm2)
• Soil temperature 1(rr_ts1)
• Soil moisture 1(r_sm1)

• average surface soil heat flow(ave_shf)
• volumetric soil moisture, site 1(sm1)
• Soil heat capacity 2(cs2)
• h(h)
• 0-5 cm integrated soil temperature, site 2(ts1)
• soil heat flow, site 1(g1)
• Soil heat capacity 1(cs1)
• 0-5 cm integrated soil temperature, site 2(ts2)
• volumetric soil moisture, site 2(sm2)
• soil heat flow, site 2(g2)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• latent heat flux(e)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)

SGP/EBBR/E8 - Incorrect Soil Temperature #s 1 and 2

Soil temperature probes #1 and #2 were replaced on June 10, 1997.  However, 
the leads were apparently not connected tightly enough, resulting in 
some large or offscale resistance measurements and therefore temperature 
values for those probes.  The problem occurred only occasionally until June 
20, 1997.  On June 20 - 24, 1997 probes 1 and 2 outputs were offscale for 
several hours per day, both not always at the same time.  On June 24, 1997, 
site operations checked and tightened the connections.  No offscale values 
have occurred since then.

Affected data values were:

15 minute: r_sm1, r_sm2, rr_ts1, rr_ts2

30 minute: sm1, sm2, ts1, ts2, c_shf1, c_shf2, ces1, ces2, 
cs1, cs2, g1, g2, ave_shf, e, h

• Soil temperature 2(rr_ts2)
• Soil moisture 2(r_sm2)
• Soil temperature 1(rr_ts1)
• Soil moisture 1(r_sm1)

• average surface soil heat flow(ave_shf)
• volumetric soil moisture, site 1(sm1)
• Soil heat capacity 2(cs2)
• h(h)
• 0-5 cm integrated soil temperature, site 2(ts1)
• soil heat flow, site 1(g1)
• Soil heat capacity 1(cs1)
• 0-5 cm integrated soil temperature, site 2(ts2)
• volumetric soil moisture, site 2(sm2)
• soil heat flow, site 2(g2)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• latent heat flux(e)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)

SGP/EBBR/E8 - AEM Inoperative

Beginning on 19 June 1997, the set screw holding one of the AEM sprockets 
to the drive motor became stripped, preventing the aspirator units from 
exchanging every time.  The problem was intermittent until 24 June when 
site operations personnel determined that a new sprocket (therefore a 
replacement AEM) was needed.  The AEM was therefore left in the position 
such that the right aspirator was in the bottom position continuously, with 
home signals indicating values near -1.  The AEM was replaced on 8 July 
1997.

For most of the time period above, home signals, bowen, e, h, and all 
thermocouple and probe tmperatures, probe relative humidities, and vapor 
pressures do not reflect a switching AEM.  However, temperatures, RH and 
vapor pressures are accurate for their height.  Obviously, bowen, e, and h 
are incorrect.

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

SGP/EBBR/E8 - Reprocess: E8 EBBR Program Compile Error, Effect On Net Radiation

An error in CR10X program compilation occurred when new software was used
to perform the compilation.  The new software created an erroneous data table
listing, which the program works off of.  An incorrect data location was
used in the adjustment of net radiation for wind speed, causing all net
radiation values to be divided by 2. The following data was incorrect during
the period above:

5 minute:  q

15 minute: mv_q

30 minute: q, e, h

The latent and sensible heat fluxes can be corrected by recomputing as follows:

e = -(2q + ave_shf)/(1 + bowen)

h = -(e + ave_shf + 2q)

• Net radiation(mv_q)

• net radiation(q)

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

E8 EBBR Lightning Strike

DQR No:                               Platform: EBBR

Subject: E8 EBBR Lightning Strike

Date Submitted:  October 16, 1997
Submitted By:                         _x_  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      ___  Other

Platform/Measurement: EBBR/Numerous
	What level data: (raw,a0,a1,b1,c1 etc): a1 (15 and 30 minute)
						a0 (5 minute)

    What location was the data collected at: E8, Coldwater, KS

    Period of time in question
 	Begin Date 07/14/97   Time 0915 GMT
 	End Date   08/05/97   Time 2300 GMT

 Discussion of Problem:

A lightning "strike" to the EF 8 Facility shortly after 0900 GMT on
14 July 1997 caused the failure of several EBBR sensors, the solar panel
voltage regulator, and the CR10X datalogger.  All data is missing for the 
period above, with degraded operations thereafter for a couple of months
while replacement parts slowly became available (a separate DQR will cover
the degraded data period).

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

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

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

SGP/EBBR/E8 - Reprocess: E8 EBBR Lightning Strike / sensor Replacements

DQR No:                               Platform: EBBR

Subject: E8 EBBR Lightning Strike

Date Submitted:  October 17, 1997
Submitted By:                         _x_  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      ___  Other

Platform/Measurement: EBBR/Numerous
	What level data: (raw,a0,a1,b1,c1 etc): a1 (15 and 30 minute)
						a0 (5 minute)

    What location was the data collected at: E8, Coldwater, KS

    Period of time in question
 	Begin Date 08/05/97   Time 2330 GMT
 	End Date   10/15/97   Time 1830 GMT

Discussion of Problem:

A lightning "strike" to the EF 8 Facility shortly after 0900 GMT on
14 July 1997 caused the failure of several EBBR sensors, the solar panel
voltage regulator, and the CR10 datalogger.  A previous DQR indicated this.
During the period listed above, all but one of the damaged parts were
replaced.  Replacements occurred on 22 July, 5 August, 19 August, and
16 September.  Some sensors began producing correct data immediately after
their replacement; however the temperature measurements were incorrect
until 15 October, when the reference temperature probe, with which they are
corrected, was reconnected.  Only the soil heat flow probe #2 remains to be
replaced.  Average soil, sensible, and latent heat fluxes are therefore
now ,still, incorrect, but can be recomputed using only four sets of soil
heat flow probes, as below.

ave_shf = (g1 +g3 + g4 + g5)/4

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

h = -(e + ave_shf + q)

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

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

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

SGP/EBBR/E7 - EBBR Biannual Checks

During EBBR 6-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 left humidity sensor chamber(rr_thum_l)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left relative humidity(mv_hum_l)
• Left air temperature(tair_l)
• Right air temperature(tair_r)
• Right relative humidity(mv_hum_r)

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

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

SGP/EBBR/E8 - Reprocess: SHF2 Incorrect

Soil heat flow probe #2 outputted incorrect, large positive values during the
period indicated.  Replacement of the probe on 29 October 1997 corrected the
problem.  The serial number of the probe replaced is 923025 and of the
replacement probe is 923110.

The data affected (and thus incorrect) includes:

15 minute: mv_hft2
30 minute: shf2, c_shf2, g2, ave_shf, e, h.

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

ave_shf = (g1 + g3 + g4 + g5)/4

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

h = -(e + ave_shf + q)

• Soil heat flow 2(mv_hft2)

• soil heat flow, site 2(g2)
• average surface soil heat flow(ave_shf)
• latent heat flux(e)
• 5 cm soil heat flow, site 2(shf2)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)

SGP/EBBR/E8 - Battery Low - Data Affected

The battery condition deteriorated over time so that the solar panel and
AC charger were not always able to keep the battery voltage high enough
to produce correct data after 3 December 1997, especially at night. 
The condition became particularly bad after 8 December 1997.  Data for
conditions of battery voltage below 10.4 volts should be considered
incorrect; inspection of the battery voltage data is required to
determine this.

The battery was replaced on 6 January 1998 at 1840 GMT, after which data
was again correct.

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

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

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

SGP/EBBR/E8 - Reprocess: E8 Soil Heat Flow #2 Failure - Replaced

Soil heat flow probe #2 values were positive and in the thousands
after an apparently catastrophic failure at 1900 GMT on
11 October 1997.  The probe was replaced on 29 October 1997
at 2010 GMT.

The data affected (and thus incorrect) includes:

15 minute: mv_hft2
30 minute: shf2, c_shf2, g2, ave_shf, e, h.

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

ave_shf = (g1 + g3 + g4 + g5)/4

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

h = -(e + ave_shf + q).

• Soil heat flow 2(mv_hft2)

• soil heat flow, site 2(g2)
• average surface soil heat flow(ave_shf)
• latent heat flux(e)
• 5 cm soil heat flow, site 2(shf2)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)

SPG/EBBR/E8 - Wind Speed Sensor and AEM Frozen

The Automatic Exchange Mechanism was frozen during the entire period and
did not exchange.

Data values that were affected by the inoperative AEM are:

 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, e, h, bowen  


The wind speed sensor was frozen stalled during part of this period 
(1100-1600 GMT).
Data values that were affected are:

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

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

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

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

SGP/EBBR/E8 - Wind Speed Frozen

During the period above the wind speed sensor cups were frozen stalled by
freezing rain.  The data fields affected are:

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)

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

SGP/EBBR/E8 - Wind Speed Frozen

During the period above the wind speed sensor cups were frozen stalled by
freezing rain.  The data fields affected are:

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)

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

SGP/EBBR/E8 - Wind Speed Frozen

During the period above the wind speed sensor cups were frozen stalled by
freezing rain.  The data fields affected are:

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)

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

SGP/EBBR/E8 - 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 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 the period above.

• Right relative humidity(mv_hum_r)
• Dummy altitude for Zeb(alt)
• lat(lat)
• lon(lon)
• Right air temperature(tair_r)
• Soil heat flow 2(mv_hft2)
• Soil heat flow 5(mv_hft5)
• Left air temperature(tair_l)
• Soil heat flow 3(mv_hft3)
• Soil heat flow 4(mv_hft4)
• Left relative humidity(mv_hum_l)
• base time(base_time)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Soil heat flow 1(mv_hft1)
• Battery(bat)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Home signal(mv_home)

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

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

EBBR E8 Net Radiation Data Quality

On 14 July 1997 lightning struck the EBBR at E8.  A number of sensors and
components needed to be replaced.  One component that was not replaced, a
J-panel, suffered some damage that was not obvious at the time.
Also, changes in sensors eventually required a change in the CR10 program 
to accomodate new calibration factors.  A new program was installed on 14
October.  Unfortunately, an incorrect nighttime calibration for the net
radiation was contained in the new program provided by the EBBR vendor REBS.
The calibration problem will be covered in a separate DQR.

The J-panel problem began to surface on 14 October as well, with most
net radiation values being smaller than correct values during the day, and 
large negative at night; the latter was partially from the J-panel problem
and partially from the incorrect nighttime calibration.  All net radiation
values, nighttime and daytime from 14 October 1997 through 12 May 1998 need
to be examined carefully (and compared with other nearby sites) to determine
if they are correct, and nighttime values need to be corrected.  Much of
the latent and sensible heat flux data is corrupted by both problems.  

The correction to nightime values will be covered in two subsequent DQRs, as
two net radiometers, with different calibrations, have been used at E8 since
14 October 1997.

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

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

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

SGP/EBBR/E8 - Six Month Checks

During EBBR 6 month checks (formally called 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 just before or after the AEM is disabled also lead to some 
incorrect data.  Incorrect 5, 15 minute and half hour data occurs for the 
period above.

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

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

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

EBBR E8 Adjustment of Negative Net Radiation Values

Please see DQR D980526.2 for some background information on the cause 
of the problem described here.

On 14 October 1997 a new CR10 program was installed at E8 EBBR.  The program
contained the wrong calibration coefficient for negative net radiations.
A multiplier had been left out of the computation of the coefficient by
the vendor.  All negative net radiation values during the stated period
need to be DIVIDED by 13.88.  Only the 5 minute and 30 minute q values are
affected.  The 15 minute mv_q values are correct.

Other values affected are 30 minute h and e, which would need to be 
recalculated from:

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

h = -(e + ave_shf + q)

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

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

EBBR E8 Adjustment of Negative Net Radiation Values

Please see DQR D980526.2 for some background information on the cause 
of the problem described here, and D980603.1 for correction to the data 
obtained with the previous net radiometer.

On 14 October 1997 a new CR10 program was installed at E8 EBBR.  The program
contained the wrong calibration coefficient for negative net radiations.
A multiplier had been left out of the computation of the coefficient by
the vendor. On 20 April 1998 a new net radiometer was installed.  It was
not noticed that the mutiplier was missing.  A slightly different 
calibration was entered for the net radiometer, again without the multiplier
applied.  A few weeks later the mentor, in trying to diagnose the obvious
incorrect negative net radiation values, discovered the missing multiplier.
A new program with the multiplier included was installed on 26 May 1998 at
1917 GMT.  

All negative net radiation values during the stated period above
need to be DIVIDED by 13.775.  Only the 5 minute and 30 minute q values are
affected.  The 15 minute mv_q values are correct.

Other values affected are 30 minute h and e, which would need to be 
recalculated from:

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

h = -(e + ave_shf + q)

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

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

SGP/EBBR/E8 - Wind Direction Incorrect

The wind direction sensor showed the usual failure signature much of the 
time, an output of 135 degrees, beginning on 24 May 1998.  Not all times 
showed 135 degrees, but all wind direction data during the stated period
should be considered incorrect.  The values affected are:

 5 minute: res_ws, wind_d, sigma_d

15 minute: mv_wind_d

30 minute: res_ws, wind_d, sigma_d

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

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

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

SGP/EBBR/E8 - Wind Direction and Speed Data Incorrect

The wind direction and speed sensors were iced stopped by freezing rain, 
resulting in the following values being incorrect:

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

• scalar wind speed(wind_s)
• Wind direction (relative to true north)(mv_wind_d)

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

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

SGP/EBBR/E8 - Wind Speed Data Incorrect

The wind speed sensor was iced stopped by freezing rain, 
resulting in the following values being 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)

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

SGP/EBBR - EBBR E8 Wind Speed Iced, Data Incorrect

The wind speed sensor was stopped by icing.  Wind speed data is incorrect.
The values are:

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

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

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

• null(Raw data stream - documentation not supported)

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

SGP/EBBR/E8 - Wind Direction Incorrect

The wind direction sensor output read 135 degrees for much of the period, 
an indication of sensor failure.  Energy Balance fluxes are not affected by
the problem.  The values below were incorrect when wind direction was 135:

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

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

SGP/EBBR/E8 - Wind Speed Incorrect

The wind speed sensor was iced stopped for the period.  Energy Balance 
fluxes are not affected by the problem.  The values below were incorrect
for the period:

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)

• null(Raw data stream - documentation not supported)

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

SGP/EBBR/E8 - Wind Speed Frozen

Wind speed and residual wind speed during this period are incorrect caused by an ice 
storm.

• scalar wind speed(wind_s)

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

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