DQR ID | Subject | Data Streams Affected |
---|---|---|
D000225.7 | SGP/EBBR - EBBR E13 Left Aspirator Not Working | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D000225.8 | ||
D000301.3 | SGP/EBBR - EBBR E13 Net Radiation Incorrect | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D931108.4 | SGP/EBBR/E13 - solid moisture correction | sgp30ebbrE13.a1 |
D940106.5 | SGP/EBBR/E13 - Invalid data during disconnection of AEM at E13 | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D940511.2 | SGP/EBBR/E13 - SM4 Replacement | sgp15ebbrE13.a1, sgp30ebbrE13.a1 |
D941208.1 | SGP/EBBR/E13 - Net Radiation - Hemisphere Replacement | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D941221.1 | SGP/EBBR/E26 - T/RH Check | sgp15ebbrE26.a1, sgp30ebbrE26.a1, sgp5ebbrE26.a0 |
D950626.1 | SGP/EBBR/E13 - Frozen Wind Speed Sensor | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D950626.2 | SGP/EBBR/E13 - Frozen Wind Speed Sensor | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D950803.3 | ||
D950815.2 | SGP/EBBR/E13 - Low Battery Voltage and AEM Left on Manual | sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D950828.1 | SGP/EBBR/E13 - Battery Voltage Drop | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D951020.1 | SGP/EBBR/E9 - 3-month Check | sgp15ebbrE9.a1, sgp30ebbrE9.a1, sgp5ebbrE9.a0 |
D951113.1 | SGP/EBBR/E13 - Wind Direction Set Pin Slippage | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D951113.6 | SGP/EBBR/E13 - Battery voltage drop | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D951220.2 | ||
D951220.6 | SGP/EBBR/E13 - battery voltage drop | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D960104.1 | ||
D960508.6 | SGP/EBBR/E13 - 3-month check | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D960606.1 | SGP/EBBR/E13 - Annual Calibration changeout | sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D961122.11 | SGP/EBBR/E13 - Wind Direction Incorrect | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D961122.19 | SGP/EBBR/E4 - EBBR 3 Month Checks - 10 EFs | sgp15ebbrE4.a1, sgp30ebbrE4.a1, sgp5ebbrE4.a0 |
D970330.1 | SGP/EBBR/E13 - Frozen Wind Speed Sensor | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D970730.3 | SGP/EBBR/E13 - CR10 Malfunction | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D971017.5 | ||
D971021.1 | SGP/EBBR/E7 - EBBR Biannual Checks | sgp15ebbrE7.a1, sgp30ebbrE7.a1, sgp5ebbrE7.a0 |
D980117.4 | ||
D980117.5 | SGP/EBBR/E26 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown) | sgp15ebbrE26.a1, sgp30ebbrE26.a1, sgp5ebbrE26.a0 |
D980410.8 | SGP/EBBR/E13 - Wind Speed Sensor Frozen | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D980416.12 | SGP/EBBR/E13 - 3-Month Check | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D980428.2 | ||
D980529.10 | SGP/EBBR/E13 - Six Month Checks | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D981112.5 | SGP/EBBR/E13 - Net Radiation Incorrect - Water in Bottom Dome | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D990127.32 | SGP/EBBR/E13 - Wind Speed Data Incorrect | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
D990127.33 | SGP/EBBR - EBBR E13 Wind Speed Data Incorrect | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.00, sgp5ebbrE13.a0 |
D990127.34 | SGP/EBBR - EBBR E13 Wind Speed Data Incorrect | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.00, sgp5ebbrE13.a0 |
D990415.1 | SGP/EBBR/E13 - Wind Speed Frozen | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/13/2000 | 2115 | 01/13/2000 | 2130 |
Subject: | SGP/EBBR - EBBR E13 Left Aspirator Not Working |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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 |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|
Subject: | |
DataStreams: | |
Description: | |
Measurements: |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/20/1999 | 1930 | 09/23/1999 | 1930 |
Subject: | SGP/EBBR - EBBR E13 Net Radiation Incorrect |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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 |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/13/1993 | 1200 | 11/02/1993 | 2121 |
Subject: | SGP/EBBR/E13 - solid moisture correction |
DataStreams: | sgp30ebbrE13.a1 |
Description: | 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. |
Measurements: | sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/31/1993 | 1950 | 12/31/1993 | 2100 |
Subject: | SGP/EBBR/E13 - Invalid data during disconnection of AEM at E13 |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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 |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/06/1994 | 1515 | 05/06/1994 | 1600 |
Subject: | SGP/EBBR/E13 - SM4 Replacement |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1 |
Description: | 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. |
Measurements: | sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/02/1994 | 1937 | 12/02/1994 | 2000 |
Subject: | SGP/EBBR/E13 - Net Radiation - Hemisphere Replacement |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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. |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/09/1994 | 1615 | 11/09/1994 | 1800 |
Subject: | SGP/EBBR/E26 - T/RH Check |
DataStreams: | sgp15ebbrE26.a1, sgp30ebbrE26.a1, sgp5ebbrE26.a0 |
Description: | 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. |
Measurements: | sgp15ebbrE26.a1:
sgp5ebbrE26.a0:
sgp30ebbrE26.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/14/1995 | 1100 | 02/14/1995 | 1730 |
Subject: | SGP/EBBR/E13 - Frozen Wind Speed Sensor |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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 |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/07/1995 | 0245 | 03/08/1995 | 1640 |
Subject: | SGP/EBBR/E13 - Frozen Wind Speed Sensor |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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 |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|
Subject: | |
DataStreams: | |
Description: | |
Measurements: |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/01/1995 | 1500 | 08/02/1995 | 1615 |
Subject: | SGP/EBBR/E13 - Low Battery Voltage and AEM Left on Manual |
DataStreams: | sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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. |
Measurements: | sgp5ebbrE13.a0:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/16/1995 | 0600 | 08/16/1995 | 1530 |
08/18/1995 | 1230 | 08/18/1995 | 1500 |
08/19/1995 | 1100 | 08/19/1995 | 1500 |
08/20/1995 | 0900 | 08/20/1995 | 1500 |
08/21/1995 | 0600 | 08/21/1995 | 1500 |
Subject: | SGP/EBBR/E13 - Battery Voltage Drop |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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. |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/05/1995 | 1530 | 10/05/1995 | 1830 |
Subject: | SGP/EBBR/E9 - 3-month Check |
DataStreams: | sgp15ebbrE9.a1, sgp30ebbrE9.a1, sgp5ebbrE9.a0 |
Description: | 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. |
Measurements: | sgp5ebbrE9.a0:
sgp15ebbrE9.a1:
sgp30ebbrE9.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/26/1995 | 0000 | 11/03/1995 | 2045 |
Subject: | SGP/EBBR/E13 - Wind Direction Set Pin Slippage |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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 |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/04/1995 | 1200 | 11/04/1995 | 1400 |
11/05/1995 | 0330 | 11/05/1995 | 1430 |
11/06/1995 | 0000 | 11/06/1995 | 1530 |
11/07/1995 | 0000 | 11/07/1995 | 1400 |
11/08/1995 | 0000 | 11/08/1995 | 1400 |
Subject: | SGP/EBBR/E13 - Battery voltage drop |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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 |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|
Subject: | |
DataStreams: | |
Description: | |
Measurements: |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/09/1995 | 0530 | 12/09/1995 | 1415 |
12/13/1995 | 0400 | 12/13/1995 | 1800 |
12/13/1995 | 2300 | 12/14/1995 | 1430 |
12/15/1995 | 0745 | 12/15/1995 | 1515 |
Subject: | SGP/EBBR/E13 - battery voltage drop |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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. |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
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Subject: | |
DataStreams: | |
Description: | |
Measurements: |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/06/1996 | 1755 | 05/06/1996 | 1835 |
Subject: | SGP/EBBR/E13 - 3-month check |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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). |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/24/1996 | 1800 | 05/24/1996 | 2130 |
Subject: | SGP/EBBR/E13 - Annual Calibration changeout |
DataStreams: | sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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. |
Measurements: | sgp5ebbrE13.a0:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/20/1996 | 0700 | 08/30/1996 | 1830 |
Subject: | SGP/EBBR/E13 - Wind Direction Incorrect |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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 |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/31/1996 | 1804 | 10/31/1996 | 1840 |
Subject: | SGP/EBBR/E4 - EBBR 3 Month Checks - 10 EFs |
DataStreams: | sgp15ebbrE4.a1, sgp30ebbrE4.a1, sgp5ebbrE4.a0 |
Description: | 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. |
Measurements: | sgp5ebbrE4.a0:
sgp15ebbrE4.a1:
sgp30ebbrE4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/07/1997 | 0530 | 02/07/1997 | 1340 |
Subject: | SGP/EBBR/E13 - Frozen Wind Speed Sensor |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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 |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/17/1997 | 0930 | 07/25/1997 | 1600 |
Subject: | SGP/EBBR/E13 - CR10 Malfunction |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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. |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
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Subject: | |
DataStreams: | |
Description: | |
Measurements: |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/16/1997 | 1533 | 04/16/1997 | 1625 |
Subject: | SGP/EBBR/E7 - EBBR Biannual Checks |
DataStreams: | sgp15ebbrE7.a1, sgp30ebbrE7.a1, sgp5ebbrE7.a0 |
Description: | 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. |
Measurements: | sgp15ebbrE7.a1:
sgp30ebbrE7.a1:
sgp5ebbrE7.a0:
|
Start Date | Start Time | End Date | End Time |
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Subject: | |
DataStreams: | |
Description: | |
Measurements: |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/08/1998 | 0100 | 01/08/1998 | 2030 |
Subject: | SGP/EBBR/E26 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown) |
DataStreams: | sgp15ebbrE26.a1, sgp30ebbrE26.a1, sgp5ebbrE26.a0 |
Description: | 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: |
Measurements: | sgp15ebbrE26.a1:
sgp5ebbrE26.a0:
sgp30ebbrE26.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/15/1998 | 1015 | 01/15/1998 | 1445 |
Subject: | SGP/EBBR/E13 - Wind Speed Sensor Frozen |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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 |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/10/1997 | 1850 | 10/10/1997 | 1932 |
Subject: | SGP/EBBR/E13 - 3-Month Check |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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. |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|
Subject: | |
DataStreams: | |
Description: | |
Measurements: |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/1998 | 2000 | 05/07/1998 | 2030 |
Subject: | SGP/EBBR/E13 - Six Month Checks |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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. |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/02/1998 | 0345 | 10/08/1998 | 1930 |
Subject: | SGP/EBBR/E13 - Net Radiation Incorrect - Water in Bottom Dome |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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. |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/21/1998 | 0015 | 12/24/1998 | 1730 |
01/01/1999 | 1515 | 01/01/1999 | 2230 |
01/08/1999 | 0205 | 01/08/1999 | 1600 |
Subject: | SGP/EBBR/E13 - Wind Speed Data Incorrect |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | 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, |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/01/1999 | 1515 | 01/01/1999 | 2230 |
Subject: | SGP/EBBR - EBBR E13 Wind Speed Data Incorrect |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.00, sgp5ebbrE13.a0 |
Description: | 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, |
Measurements: | sgp5ebbrE13.a0:
sgp5ebbrE13.00:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/08/1999 | 0205 | 01/08/1999 | 1600 |
Subject: | SGP/EBBR - EBBR E13 Wind Speed Data Incorrect |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.00, sgp5ebbrE13.a0 |
Description: | 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, |
Measurements: | sgp5ebbrE13.a0:
sgp5ebbrE13.00:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/13/1999 | 2330 | 03/14/1999 | 0500 |
Subject: | SGP/EBBR/E13 - Wind Speed Frozen |
DataStreams: | sgp15ebbrE13.a1, sgp30ebbrE13.a1, sgp5ebbrE13.a0 |
Description: | Wind speed and residual wind speed during this period are incorrect caused by an ice storm. |
Measurements: | sgp5ebbrE13.a0:
sgp15ebbrE13.a1:
sgp30ebbrE13.a1:
|