SGP/EBBR - EBBR E13 Left Aspirator Not Working

A loss of the 12V DC power to the left aspirator caused it to stop
operating.  The affected measurements 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, bowen, h, e

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

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

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

SGP/EBBR - EBBR E13 Net Radiation Incorrect

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

The affected data are:

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

• net radiation(q)

• Net radiation(mv_q)

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

SGP/EBBR/E13 - solid moisture correction

In the original EBBR software (Version 1) for the Campbell CR10 at the Central
Facility (E13), adjustment of the soil moisture for soil type was performed
differently than for the other EBBR systems.  This was supposed to have
been changed prior to installation (according to the vendor), but the
change was not made.  This adjustment was carried into Version 2 and was
not discovered by the mentor (me) until later.  A polynomial is used to
adjust the measured soil moisture for differences between the soil type at
the location of installation (clay-loam assumed) and the soil type (sand)
used in the calibration of the soil moisture sensor.  The adjustment in
the E13 EBBR only, was computed on the basis of a sandy-loam soil.

Presently, a clay-loam soil type is assumed for each EBBR location.  Soil
types at the extended facilities have not been characterized yet, although
there are hopes of doing so in the future.  The effect of using a
polynomial for sandy-loam soil instead of clay-loam soil is to decrease the
resultant soil moisture values by approximately 14.5% when the clay-loam
polynomial would indicate a soil moisture of 28.3%, and by approximately
38.3% when the clay-loam polynomial would indicate a soil moisture of 6.3%.
The normal range of soil moisture at the EBBR sites is approximately 3% to
35%.

The effect of the soil moisture decreases above on the adjustment to soil heat
flux plate measurements is less than 1.0%.  The effect on the change in
energy storage in the soil (determined from the change in soil temperature
over time) is a 10% decrease for a soil moisture of 28.3% and a decrease of
13.0% for a soil moisture of 6.3%.  The change in energy storage is typically
5% of the total surface energy budget during mid-day and 25% at night.
Therefore, the soil type adjustment error in the Central Facility EBBR
resulted in approximately a 0.5% error in the surface energy budget during
mid-day and 2.5% at night.  These are small and acceptable errors and
should not cause one to need to recalculate energy budget values.

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

SGP/EBBR/E13 - Invalid data during disconnection of AEM at E13

On December 31, 1993 at 1950 GMT the AEM on the Central Facility EBBR was
disconnected.  Another AEM was then connected, on which some testing was needed
before site operations could be confident that it was ready for field
installation at an extended facility.  At 2041 GMT the original AEM was
reconnected.  The following 5, 15, and 30 minute data between or for the stated
times below is invalid:

5 minute (1950 to 2045 GMT): tair_top, tair_bot, thum_top, thum_bot, hum_top,
          hum_bot, vp_top, vp_bot, home

15 minute (2000 to 2045 GMT): rr_thum_r, rr_thum_l, mv_hum_r, mv_hum_l,
           mv_home, tair_r, tair_l

30 minute (2000 through 2100 GMT): tair_top, tair_bot, thum_top, thum_bot,
           hum_top, hum_bot, vp_top, vp_bot, bowen, e, h, home_15, home_30

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

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

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

SGP/EBBR/E13 - SM4 Replacement

Soil Moisture Probe #4 has been indicating large soil moistures in the past
couple of months.  At times the values have exceeded the upper limit of the
acceptable range.  This data could be considered questionable, although the
affect on average soil moisture and quantities affected by it is very small.
Therefore, I do not suggest additional flagging of the data other than that
imposed by the limits.  The probe was changed from S/N 92004 to 93004 on
May 6, 1994 at 1530 GMT.  During the exchange process a few selected periods
of soil moisture #4 data is incorrect, but not so different from the other
soil moisture probes as to have a significant affect on the average soil
moisture or the fluxes.

Additionally, the EBBR output was interrupted for a half hour while the
calibration of the new probe was entered into the CR10 data logger.
Therefore, all 5 minute data from 1535 to 1600 GMT, 15 minute data for 1545
and 1600 GMT, and 30 minute data for 1600 GMT is incorrect.

Furthermore, disturbance of the area near the #4 soil probes (temperature,
soil moisture, and heat flux) caused all three to be incorrect for the
following periods:

30 minute  1530 GMT

15 minute  1515 and 1530 GMT

5 minute   1515, 1520, 1525, and 1530 GMT.

Complete recovery by all three sensors did not occur for one day (which is
fairly typical for near surface installations), although the differences
from the other four sets of soil sensors did not deleteriously affect the
averages of the soil quantities.

• Right air temperature(tair_r)
• Soil heat flow 4(mv_hft4)
• Left air temperature(tair_l)
• Soil temperature 4(rr_ts4)
• Soil moisture 4(r_sm4)

• 0-5 cm integrated soil temperature, site 2(ts2)
• latent heat flux(e)
• volumetric soil moisture, site 4(sm4)
• 0-5 cm integrated soil temperature, site 3(ts3)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 5 cm soil heat flow, site 4(shf4)
• h(h)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)

SGP/EBBR/E13 - Net Radiation - Hemisphere Replacement

The upper hemisphere of the net radiometer was punctured (pinhole) and thus
was replaced at 1937 GMT on December 2, 1994.  This resulted in a spike in
the net radiation data.  5 minute q data for 1935, 1940, 1945, and
1955 GMT, 15 minute mv_q data for 1945 and 2000 GMT, and 30 minute q, e,
and h data for 2000 GMT are incorrect.

• net radiation(q)

• Net radiation(mv_q)

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

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/E13 - Frozen Wind Speed Sensor

DQR No:                               Platform: EBBR

Subject: Frozen Wind Speed Sensor

Date Submitted: JUNE 22, 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/ Wind Speed
        What level data: (raw,a0,a1,b1,c1 etc): a1 (15 and 30 minute)
                                                a0 (5 minute)

    What location was the data collected at: E13, Central Facility

    Period of time in question
        Begin Date 2/14/95   Time 1100 GMT
        End                  Time 1730 GMT

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

 Discussion of Problem:

On February 14, 1995 a frontal system deposited freezing rain in central
Oklahoma that resulted in the EBBR wind speed instrument becoming frozen in
place at the Central Facillity (E13) for part of a day.  All 5, 15, and 30
minute data values indicated below are incorrect for the period listed above.

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

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

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

• scalar wind speed(wind_s)

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

SGP/EBBR/E13 - Frozen Wind Speed Sensor

On March 7, 1995 freezing rain stopped the cups of the EBBR wind
speed instrument at the Central Facility (E13).  All 5, 15, and 30
minute data values indicated below are incorrect for the period listed above.

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

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

• scalar wind speed(wind_s)

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

SGP/EBBR/E13 - Low Battery Voltage and AEM Left on Manual

Low battery voltage caused some data values to be incorrect beginning at
1500 GMT on August 1, 1995.  The data should be carefully inspected to
determine which values are incorrect.

During replacement of the battery at the Central Facility EBBR on August
1, 1995, the AEM exchange toggle switch was left in the manual position,
which caused the right aspirator to remain in the home position until the
switch was correctly placed in the exchange position at 1616 GMT on August
2, 1995.  All 5, 15, and 30 minute values of temperature, relative humidity
, vapor pressure, bowen, e, and h are incorrect during the period. 15 and
30 minute values are also incorrect at 1630 GMT.

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

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

SGP/EBBR/E13 - Battery Voltage Drop

Sometime before August 16, 1995 the AC/DC converter was switched off and
the instrument heaters were switched on.  The solar panel was not able to
keep the battery voltage up under these conditions.  Much of the data for
the periods indicated is incorrect, especially data from the sensors that
require 12 volts DC power.  The data would have to be inspected to
determine what data is correct and what is incorrect.  It would be safest to
exclude all data from those periods from any analysis.  Site operations
switched the heaters off and turned the converter back on on August 21,
1995.

As reported in a recent DQR, the fluxes from the EBBR are incorrect
presently because of a malfunctioning T/RH probe; no spares are presently
available.

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

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

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

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/E13 - Wind Direction Set Pin Slippage

The set pin bolt on the wind vane loosened, allowing the vane to turn on
the shaft.  Wind directions are incorrect as a result, for the period
listed above.  The bolt was tightened on 3 Nov 95 so that correct wind
directions would result.

Values that are incorrect for the period are:

5 minute:   wind_d, res_ws, sigma_wd

15 minute:  mv_wind_d

30 minute:  wind_d, res_ws, sigma_wd

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

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

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

SGP/EBBR/E13 - Battery voltage drop

On Friday 2 November, 1995 the instrument heaters were switched on.  By
4 November, the solar panel was not able to maintain the battery voltage for
the cold night conditions that existed.  On Monday, 5 November the heaters
were turned off, but the poor condition of the battery did not allow it,
once partially drained, to recharge sufficiently for nighttime conditions.
On 8 November, at 2106 GMT, the battery was replaced (resulting in missing
data for 2030-2130 GMT).  Most of the data for the period above is incorrect,
especially data from the sensors that require at least 11 volts DC power.
The data that is incorrect is listed below.

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

15 minute:  rr_thum_r, rr_thum_l, rr_ts1, rr_ts2, rr_ts3, rr_ts4, rr_ts5,
            rr_tref, mv_hum_r, mv_hum_l, mv_pres, mv_home, mv_q, mv_hft1,
            mv_hft2, mv_hft3, mv_hft4, mv_hft5, tair_r, tair_l

30 minute:  tair_top, tair_bot, tref, thum_top, thum_bot, hum_top, hum_bot,
            vp_top, vp_bot, pres, home_15, home_30, bowen, e, h, shf, shf1,
            shf2, shf3, shf4, shf5, c_shf1, c_shf2, c_shf3, c_shf4, c_shf5,
            ts1, ts2, ts3, ts4, ts5, q, g1, g2, g3, g4, g5, ces1, ces2,
            ces3, ces4, ces5

Periods of time affected (these are the 30 minute periods that are
incorrect - incorrect 5 and 15 minute data may also occur for all or part
of the previous half hour):

4 Nov 95: 1200-1400 GMT
5 Nov 95: 0330-1430 GMT
6 Nov 95: 0000-1530 GMT
7 Nov 95: 0000-1400 GMT
8 Nov 95: 0000-1400 GMT

• Home signal(home)
• Retrieved pressure profile(pres)
• Temperature of bottom humidity sensor chamber(thum_bot)
• bottom air temperature(tair_bot)
• top vapor pressure(vp_top)
• bottom vapor pressure(vp_bot)
• Temperature of the top humidity chamber(thum_top)
• top air temperature(tair_top)
• Reference Thermistor Temperature(tref)
• Bottom humidity(hum_bot)
• Top humidity(hum_top)
• net radiation(q)

• Soil temperature 1(rr_ts1)
• Soil heat flow 3(mv_hft3)
• Soil heat flow 5(mv_hft5)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Soil temperature 5(rr_ts5)
• Left relative humidity(mv_hum_l)
• Reference temperature(rr_tref)
• Soil temperature 2(rr_ts2)
• Soil temperature 3(rr_ts3)
• Soil heat flow 1(mv_hft1)
• Temperature of left humidity sensor chamber(rr_thum_l)
• Soil heat flow 4(mv_hft4)
• Left air temperature(tair_l)
• Soil temperature 4(rr_ts4)
• Soil heat flow 2(mv_hft2)
• Right air temperature(tair_r)
• Right relative humidity(mv_hum_r)
• Net radiation(mv_q)
• Home signal(mv_home)

• soil heat flow, site 1(g1)
• Reference Thermistor Temperature(tref)
• 0-5 cm integrated soil temperature, site 2(ts2)
• latent heat flux(e)
• top vapor pressure(vp_top)
• Temperature of bottom humidity sensor chamber(thum_bot)
• 5 cm soil heat flow, site 3(shf3)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• Bottom humidity(hum_bot)
• h(h)
• bottom air temperature(tair_bot)
• soil heat flow, site 5(g5)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• 5 cm soil heat flow, site 5(shf5)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• 5 cm soil heat flow, site 1(shf1)
• 0-5 cm integrated soil temperature, site 3(ts3)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• 0-5 cm integrated soil temperature, site 5(ts5)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• net radiation(q)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Temperature of the top humidity chamber(thum_top)
• 5 cm soil heat flow, site 2(shf2)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• soil heat flow, site 2(g2)
• bottom vapor pressure(vp_bot)
• top air temperature(tair_top)
• 0-5 cm integrated soil temperature, site 2(ts1)
• Top humidity(hum_top)
• soil heat flow, site 4(g4)

SGP/EBBR/E13 - battery voltage drop

The E13 battery condition was such that the solar panel was not able to
keep the battery voltage up (greater than 11 V DC) under cloudy conditions.
The data for the periods above is incorrect; many sensors require at least
11 volts DC power.  On 15 December 1995 at 1900 GMT the EBBR lost it's
connection to the site data system; data after this period will be discussed
in a separate DQR.

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

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

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

SGP/EBBR/E13 - 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).

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

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

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

SGP/EBBR/E13 - Annual Calibration changeout

On May 24, 1996 the changeout for annual calibration occurred at E13,
Central Facility, OK.  Between 1800 and 2130 GMT no data was remotely collected.
Furthermore, 5 minute data inbetween 1800 and 2130 is incorrect, 15 minute data 
between 1800 and 2130 is incorrect, and 30 minute data for 2130 GMT is 
incorrect.  A large jump in soil moisture appears in the data after the 
installation was completed (the soil bags holding the probes had a greater 
than ambient soil moisture).  Soil measurements indicated greater than ambient 
soil moisture until a rain just after 0600 GMT on 1 June saturated the soil; 
after this period the probes reflected actual soil moisture conditions.  

The larger than normal soil moistures have some impact on the soil heat flux 
during this time of year, and thus soil heat flux from the soil flow plates 
and soil temperature probes, as well as average soil heat flux, computed 
sensible and latent heat fluxes; these quantities should be considered to 
be incorrect from 24 June at 2130 GMT until about 1200 GMT on June 1.

Because of communication problems, data is missing from the time of the 
EBBR installation until 29 May 1996 at about 1815 GMT.  This data may be 
recovered from the sneakernetted data set.

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

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

SGP/EBBR/E13 - Wind Direction Incorrect

Wind direction was incorrect during the period indicated due to a sensor 
electronics failure.  On 30 August 1996 site operations replaced S/N K3035
with S/N K3034.  Correct data collection resumed.

Values that are incorrect for the period are:

5 minute:   wind_d, res_ws, sigma_wd

15 minute:  mv_wind_d

30 minute:  wind_d, res_ws, sigma_wd

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

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

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

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/E13 - Frozen Wind Speed Sensor

On February 7, 1997 freezing rain stopped the cups of the EBBR wind 
speed instrument at the Central Facility (E13).  All 5, 15, and 30 
minute data values indicated below are incorrect for the period listed.

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

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

• scalar wind speed(wind_s)

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

SGP/EBBR/E13 - CR10 Malfunction

The CR10 apparently malfunctioned on 17 July 1997.  This caused a variety 
of effects, including incorrect datalogger clock times, missing data 
periods, and some corrupted data fields.  The CR10 was replaced on 
25 July 1997; all data fields are now correct.  Data users may contact
the mentor for more detailed information on data quality during this 
period.

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

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

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

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/E26 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown)

The EBBR AEM stopped exchanging because of icing at during this time
period.

The calculations of Bowen ratio, latent heat flux, and sensible heat
flux are incorrect for the time period indicated.  The other
measurements listed  are also incorrect for those times:

• 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/E13 - Wind Speed Sensor Frozen

The wind speed sensor was frozen during the period.  

Data values that were incorrect are:

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

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

• scalar wind speed(wind_s)

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

SGP/EBBR/E13 - 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.

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

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

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

SGP/EBBR/E13 - 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 indicated.

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

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

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

SGP/EBBR/E13 - Net Radiation Incorrect - Water in Bottom Dome

Water entered the net radiometer top dome through a hole made, probably,
by migrating birds (this happens every Spring and Autumn) and accumulated
in the bottom dome.  This causes nighttime net radiations to be too large
and daytime net radiations to be too small.  The data is therefore incorrect.

• net radiation(q)

• Net radiation(mv_q)

• net radiation(q)

SGP/EBBR/E13 - 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,

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

• scalar wind speed(wind_s)

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

SGP/EBBR - EBBR E13 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,

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

• null(Raw data stream - documentation not supported)

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

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

SGP/EBBR - EBBR E13 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,

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

• null(Raw data stream - documentation not supported)

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

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

SGP/EBBR/E13 - Wind Speed Frozen

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

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

• scalar wind speed(wind_s)

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