DQR ID | Subject | Data Streams Affected |
---|---|---|
D030530.3 | SGP/EBBR/E27 - E27 EBBR Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR | sgp30ebbrE27.b1 |
D030711.2 | SGP/EBBR/E27 - Soil Heat Flow #2 Incorrect | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
D030711.3 | SGP/EBBR/E27 - Soil Heat Flow #4 Incorrect | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
D030711.4 | SGP/EBBR/E27 - Reference T Sensor Failure | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D030711.5 | SGP/EBBR/E27 - Wind Direction Hung | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D030712.24 | SGP/EBBR/E27 - 6 Month Checks | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D030728.5 | SGP/EBBR/E27 - Soil Heat Flow #1 Large | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
D030728.6 | SGP/EBBR/E27 - Incorrect Data From Logger Restart | sgp30ebbrE27.b1 |
D030919.12 | SGP/EBBR/E27 - Water in Net Radiometer; Surface Fluxes are Incorrect | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D030919.13 | SGP/EBBR/E27 - 15 and 30 Minute Data All Zeros | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
D030922.7 | SGP/EBBR/E27 - Right Air Temperature Spiked Offscale | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D031021.3 | SGP/EBBR/E27 - Missing data during system update | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D031117.3 | SGP/EBBR/E27 - Right Air Temperature Spiked Offscale | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D031204.22 | SGP/EBBR/E27 - 6 Month Checks | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D031210.1 | SGP/EBBR/E27 - Reprocess: Soil Heat Flow #5 Offscale, Surface Fluxes Incorrect | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
D031222.26 | SGP/EBBR/E27 - Soil Temperature #3 Spike in Data | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
D040304.25 | SGP/EBBR/E27 - Wind Speed Frozen Stopped By Ice | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D040318.13 | SGP/EBBR/E27 - Soil Moisture #5 Insensitive | sgp30ebbrE27.b1 |
D040507.3 | SGP/EBBR/E27 - Right Air Temperature Incorrect | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D040706.3 | SGP/EBBR/E27 - Loose Tair Left Connections | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D041222.19 | SGP/EBBR/E27 - 6 Month Checks | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D050206.17 | SGP/EBBR/E27 - Wind Speed Frozen Stopped By Ice Storm | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D050207.13 | SGP/EBBR/E27 - Wind Direction Frozen Stopped By Ice Storm | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D050211.2 | SGP/EBBR/E27 - Soil Moisture #5 Incorrect | sgp30ebbrE27.b1 |
D050413.6 | SGP/EBBR/E27 - SM2 Coefficients Incorect | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
D050719.16 | SGP/EBBR/E27 - Improved EBBR CR10 Program | sgp30ebbrE27.b1 |
D051106.15 | SGP/EBBR/E27 - Net Radiation Incorrect; Sensible and Latent Heat Fluxes Incorrect | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D051106.16 | SGP/EBBR/E27 - Net Radiation Incorrect; Sensible and Latent Heat Fluxes Incorredt | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D051106.31 | SGP/EBBR/E27 - Average Soil Heat Flux Incorrect | sgp30ebbrE27.b1 |
D051112.10 | SGP/EBBR/E27 - metadata corrections | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D060425.1 | SGP/EBBR/E27 - Sensible and Latent Heat Fluxes Incorrect | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D060501.27 | SGP/EBBR/E27 - Flux and Gradient Measurements Incorrect | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D060508.3 | SGP/EBBR/E27 - Instrument problem, Loose connections | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
D060712.1 | SGP/EBBR/E27 - Field fire burned AEM | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D060809.1 | SGP/EBBR/E27 - Sensible, Latent, and Average Soil Heat Fluxes Sometimes Incorrect | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
D060809.2 | SGP/EBBR/E27 - Low Battery Condition | sgp30ebbrE27.b1, sgp5ebbrE27.b1, sgp15ebbrE27.b1 |
D060818.11 | SGP/EBBR/E27 - Most Measurements Suspect | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D060818.13 | SGP/EBBR/E27 - Battery Voltage Problem - Measurements Incorrect | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D061220.16 | SGP/EBBR/E27 - Wind Direction Dependency of Surface Fluxes and General Data Quality Information | sgp30ebbrE27.b1 |
D070809.1 | SGP/EBBR/E27 - Multiplexer #2 failure | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D080114.3 | SGP/EBBR/E27 - Measurements offscale | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
D090313.9 | SGP/EBBR/E27 - Wind Speed Incorrect | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/2003 | 1030 | 06/18/2003 | 2359 |
Subject: | SGP/EBBR/E27 - E27 EBBR Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) |
DataStreams: | sgp30ebbrE27.b1 |
Description: | The units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in the EBBR 30 minute netcdf header have been incorrect from the beginning of processing the data into netcdf files. The correct units are MJ/m^3/C. This does not affect the data quality. |
Measurements: | sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/2003 | 1030 | 07/09/2003 | 1700 |
Subject: | SGP/EBBR/E27 - Soil Heat Flow #2 Incorrect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
Description: | Soil Heat Flow sensor #2 was intermittently incorrect at first and then constantly so later in the period. |
Measurements: | sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/15/2003 | 0100 | 06/23/2003 | 1900 |
06/27/2003 | 1030 | 06/27/2003 | 1300 |
06/30/2003 | 0030 | 06/30/2003 | 0730 |
06/30/2003 | 1000 | 06/30/2003 | 2000 |
07/05/2003 | 0400 | 07/10/2003 | 0500 |
07/10/2003 | 1430 | 07/20/2003 | 0300 |
07/20/2003 | 1730 | 07/21/2003 | 0230 |
07/21/2003 | 1930 | 07/22/2003 | 0230 |
07/22/2003 | 1730 | 07/23/2003 | 0600 |
07/23/2003 | 1630 | 07/23/2003 | 1900 |
Subject: | SGP/EBBR/E27 - Soil Heat Flow #4 Incorrect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
Description: | Soil Heat flow sensor #4 outputs were often very small negative numbers. See below for a work-around. |
Measurements: | sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/2003 | 1030 | 05/15/2003 | 1600 |
05/18/2003 | 1800 | 05/28/2003 | 1700 |
Subject: | SGP/EBBR/E27 - Reference T Sensor Failure |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The reference T sensor was not working much of the time, affecting all other temperature sensors. Sensible and latent heat fluxes were incorrect when this occurred. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/2003 | 1030 | 06/12/2003 | 1800 |
Subject: | SGP/EBBR/E27 - Wind Direction Hung |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The Wind Direction frequently hung at values in the 70s or 80s. No other data was affected. Fluxes were not affected. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/15/2003 | 1600 | 05/15/2003 | 1645 |
Subject: | SGP/EBBR/E27 - 6 Month Checks |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/25/2003 | 1630 | 06/25/2003 | 1630 |
Subject: | SGP/EBBR/E27 - Soil Heat Flow #1 Large |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
Description: | Soil Heat Flow #1 was large for this period, for an unknown reason. |
Measurements: | sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/09/2003 | 1700 | 07/09/2003 | 1700 |
Subject: | SGP/EBBR/E27 - Incorrect Data From Logger Restart |
DataStreams: | sgp30ebbrE27.b1 |
Description: | Some 30 minute was zero or incorrect after restart of the CR10. This is a common occurrence when sensor replacements are made or power outages occur. |
Measurements: | sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/30/2003 | 0630 | 09/03/2003 | 1700 |
Subject: | SGP/EBBR/E27 - Water in Net Radiometer; Surface Fluxes are Incorrect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The net radiometer top dome was punctured by migrating birds. This alone does not cause incorrect net radiation measurements. However, when it subsequently rains, water collects in the bottom dome, causing the net radiation measurements to be too large during the day and too small at night. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/20/2003 | 1600 | 08/20/2003 | 1600 |
Subject: | SGP/EBBR/E27 - 15 and 30 Minute Data All Zeros |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
Description: | 15 and 30 minute measurements were all zero after restarting the CR10 datalogger. |
Measurements: | sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/15/2003 | 1030 | 11/17/2003 | 0630 |
Subject: | SGP/EBBR/E27 - Right Air Temperature Spiked Offscale |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The right air temperature was going offscale at times. This problem seemed to end without Site Ops. intervention. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/29/2003 | 1700 | 10/29/2003 | 1930 |
Subject: | SGP/EBBR/E27 - Missing data during system update |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | Some soil parameters were slightly incorrect since EBBR.E27 was installed in May 2003. While the coefficients were being updated, data collection was suspended resulting in missing data for the specified period. No significant effects (1% or less) on the surface heat flux data would have occurred from using the slightly incorrect coefficients. Therefore, flagging of the surface flux data from the time of installation of E27 is unwarranted. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/06/2003 | 1200 | 10/11/2003 | 0730 |
Subject: | SGP/EBBR/E27 - Right Air Temperature Spiked Offscale |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The right air temperature was going offscale at times. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/29/2003 | 1830 | 10/29/2003 | 1945 |
Subject: | SGP/EBBR/E27 - 6 Month Checks |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/12/2003 | 1700 | 10/12/2003 | 2359 |
Subject: | SGP/EBBR/E27 - Reprocess: Soil Heat Flow #5 Offscale, Surface Fluxes Incorrect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
Description: | Soil Heat Flow #5 went offscale at times. Latent and Sensible Heat Fluxes were incorrect when this occurred. |
Measurements: | sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/06/2003 | 0900 | 12/06/2003 | 0900 |
Subject: | SGP/EBBR/E27 - Soil Temperature #3 Spike in Data |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
Description: | The soil temperature #3 spiked to zero and was therefore incorrect. |
Measurements: | sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/02/2004 | 0705 | 02/02/2004 | 1800 |
02/05/2004 | 0205 | 02/05/2004 | 0600 |
Subject: | SGP/EBBR/E27 - Wind Speed Frozen Stopped By Ice |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | An ice storm froze the wind speed sensor to a stopped condition. The wind speed and residual wind speed measurements are incorrect. This sensor failure does not affect the sensible and latent heat fluxes. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/25/2004 | 0600 | 05/12/2004 | 1930 |
Subject: | SGP/EBBR/E27 - Soil Moisture #5 Insensitive |
DataStreams: | sgp30ebbrE27.b1 |
Description: | Soil moisture sensor #5 was insensitive and put out a value of around 30%. Sensible and latent heat fluxes were not significantly affected by this small error. |
Measurements: | sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/01/2004 | 0000 | 03/31/2004 | 2355 |
Subject: | SGP/EBBR/E27 - Right Air Temperature Incorrect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The right air temperature, and therefore top and bottom air temperatures were offscale or incorrect on occasion. Bowen ratio, sensible heat flux, and latent heat flux were also incorrect during those times. Inspection of the data is required to detect the incorrect periods. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/10/2004 | 0600 | 07/21/2004 | 1725 |
Subject: | SGP/EBBR/E27 - Loose Tair Left Connections |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | Tair left dropped out at times. When this occurred, the sensible and latent heat fluxes are incorrect. Tightening of the electronic connections to the datalogging equipment appears to have solved the problem. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/29/2004 | 2000 | 09/29/2004 | 2030 |
Subject: | SGP/EBBR/E27 - 6 Month Checks |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2005 | 1555 | 01/07/2005 | 1605 |
Subject: | SGP/EBBR/E27 - Wind Speed Frozen Stopped By Ice Storm |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | An ice storm froze the wind speed sensor to a stopped condition. The wind speed and residual wind speed measurements are incorrect. This sensor failure does not affect the sensible and latent heat fluxes. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/06/2005 | 1005 | 01/07/2005 | 1430 |
Subject: | SGP/EBBR/E27 - Wind Direction Frozen Stopped By Ice Storm |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The wind direction sensor was frozen stopped by ice from a storm. The wind direction, sigma_wd, and residual wind speed measurements are incorrect. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/15/2004 | 1600 | 03/07/2005 | 2100 |
Subject: | SGP/EBBR/E27 - Soil Moisture #5 Incorrect |
DataStreams: | sgp30ebbrE27.b1 |
Description: | The wrong CR10 program loaded from the storage module on 9/15/04. During the previous change of program, an attempt was made to store the new program in the storage module; site ops techs did not notice that this attempt failed, leaving the old program in the storage module. When power was cyled on 9/15/04, the old program with flat sm5 coefficients loaded into the CR10. The "flat" coefficients resulted in the sm5 soil moisture hovering around 30%. 15 minute raw sm5 resistances were correct. Average soil heat flow, sensible heat flux, and latent heat flux were not significantly affected and so are not included in the list of incorrect measurements. |
Measurements: | sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/04/2004 | 1645 | 03/02/2005 | 1600 |
Subject: | SGP/EBBR/E27 - SM2 Coefficients Incorect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
Description: | Soil Moisture #2 coefficients in the CR10 datalogger program were incorrect during the time that an old program version was installed. |
Measurements: | sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/2003 | 0000 | 03/30/2005 | 1730 |
Subject: | SGP/EBBR/E27 - Improved EBBR CR10 Program |
DataStreams: | sgp30ebbrE27.b1 |
Description: | Effective 20050330.1730, the EBBR.E27 CR10 program was revised to improve the quality of the primary measurements as follows: 1) An RMS procedure is used to determine max and min limits of acceptable soil heat flow. This is applied to the individual soil sets. Measurements outside the limits are rejected and the measurements within the limits are used to calculate the average soil heat flow. 2) Max and min limits are used to determine incorrect values of net radiation, sensible heat flux (h), latent heat flux (e), and automatic exchange mechanism (AEM) signal. If AEM signal is outside the limits, h and e are set to 999s. If net radiation is outside the limits, h and e are set to 999s. If h or e are outside the limits, h and e are set to 999s. Virtually no incorrect soil measurement will affect the primary measurements of h and e. By setting h and e to 999s, it can be easily seen that the primary variables are incorrect; no other interpretation is possible. Prior to 20050330, the improved CR10 program was NOT in effect. DQRs have been submitted for known instances of incorrect soil measurements which affected the quality of the primary measurements of h and e. Note: the DQR begin date is the begin date of the sgp30ebbrE27.b1 data stream. The earlier version of the CR10 program was also used on previous EBBR datastream names (e.g. sgp30ebbrE27.a1). |
Measurements: | sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/05/2005 | 2200 | 08/17/2005 | 1600 |
Subject: | SGP/EBBR/E27 - Net Radiation Incorrect; Sensible and Latent Heat Fluxes Incorrect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The net radiometer top dome was broken and water got inside, making the net radiation, and sensible and latent heat flux measurements incorrect. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/17/2005 | 1630 | 08/27/2005 | 1930 |
Subject: | SGP/EBBR/E27 - Net Radiation Incorrect; Sensible and Latent Heat Fluxes Incorredt |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | Residual Moisture left in the top dome of the net radiometer after the 8/17/05 servicing caused the net radiation measurements to be biased low, and resulting in sensible and latent heat flux being low also. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/02/2005 | 1600 | 03/30/2005 | 1730 |
Subject: | SGP/EBBR/E27 - Average Soil Heat Flux Incorrect |
DataStreams: | sgp30ebbrE27.b1 |
Description: | A typo in the version 9 EBBR program caused average soil heat flow to be zero, resulting in both sensible and latent heat fluxes being approximately 20 watts per meter squared too large during the middle of the day. |
Measurements: | sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2003 | 0000 | 08/16/2005 | 2359 |
Subject: | SGP/EBBR/E27 - metadata corrections |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | On 20050816, a series of metadata corrections and additions were completed. These metadata changes apply to all EBBR.E27 data collected by ARM back to the installation of the instrument in May 2003. Please see the current metadata for correct information. These changes do not affect data values or quality. The changes are summarized below: 1) Update of "sensor location" information 2) Addition of installation dates for the systems 3) Correction of soil moisture units (from "by volume" to "gravimetric") |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/03/2006 | 0000 | 05/10/2006 | 1130 |
05/25/2006 | 2100 | 06/20/2006 | 1730 |
Subject: | SGP/EBBR/E27 - Sensible and Latent Heat Fluxes Incorrect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The left T/RH probe temperature sensor was spiking some of the time during these periods. Therefore, sensible and latent heat fluxes were incorrect during parts of the periods as well. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
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Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/18/2006 | 0330 | 03/01/2006 | 1615 |
Subject: | SGP/EBBR/E27 - Flux and Gradient Measurements Incorrect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The sensible and latent heat flux and gradient measurements were incorrect while the AEM was hung in one position. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
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Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/09/2006 | 1900 | 04/16/2006 | 1600 |
Subject: | SGP/EBBR/E27 - Instrument problem, Loose connections |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
Description: | The soil heat flow #1 sensor went offscale low on occasion. This sometimes caused sensible and latent heat fluxes to be 9999ed out by the EBBR programming, but not always. |
Measurements: | sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
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Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/11/2006 | 0130 | 07/21/2006 | 1730 |
Subject: | SGP/EBBR/E27 - Field fire burned AEM |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | A fire in the E27 field burned the AEM, making it non-functional. Sensible and latent heat fluxes and gradients were incorrect during this period. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/04/2006 | 1930 | 05/04/2006 | 2200 |
05/05/2006 | 0230 | 05/05/2006 | 0800 |
05/06/2006 | 0430 | 06/20/2006 | 1730 |
Subject: | SGP/EBBR/E27 - Sensible, Latent, and Average Soil Heat Fluxes Sometimes Incorrect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1 |
Description: | The Soil Heat Flow #1 sensor kept going offscale. Sensible and Latent heat fluxes and the ave_shf were affected and sometimes incorrect. |
Measurements: | sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
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Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/31/2006 | 0600 | 06/07/2006 | 1730 |
06/14/2006 | 0500 | 06/20/2006 | 1730 |
Subject: | SGP/EBBR/E27 - Low Battery Condition |
DataStreams: | sgp30ebbrE27.b1, sgp5ebbrE27.b1, sgp15ebbrE27.b1 |
Description: | A low battery condition caused most of the measurements to be incorrect. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
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Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/26/2006 | 1830 | 08/17/2006 | 1730 |
Subject: | SGP/EBBR/E27 - Most Measurements Suspect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The wrong EBBR program was used at this site. Therefore, most of the measurements are suspect. Note: Mentor reports reprocessing will not correct this problem. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/11/2006 | 1300 | 08/21/2006 | 2330 |
Subject: | SGP/EBBR/E27 - Battery Voltage Problem - Measurements Incorrect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | Battery voltage was too low much of the time during the period, thus most measurements were incorrect during much of the time period. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/2003 | 1030 | 10/12/2003 | 2330 |
Subject: | SGP/EBBR/E27 - Wind Direction Dependency of Surface Fluxes and General Data Quality |
DataStreams: | sgp30ebbrE27.b1 |
Description: | Beginning in FY2006, Data Quality Reports are not written for missing data or for situations when qc flags clearly show that the data is incorrect (this is true for most of the conditions listed below). DQRs are written for periods when data is incorrect, when the situation is not represented by qc flags in the data, and it's not obvious that the data should have been flagged as incorrect. The EBBR data is only useful for particular wind directions at each Extended Facility. Please use the following resources to help in interpreting the EBBR data. 1) qc flags in the EBBR data. 2) Instrument Mentor Monthly Summaries (IMMS) at http://www.db.arm.gov/IMMS/ 3) SGP EF Surface Conditions Observations (EFSCO) at http://198.124.96.210:591/sfc_cond1/default.htm 4) Surface fluxes are valid only for the following wind directions (in degrees): 20-156 Note that there are wind directions at most sites for which the fetch is insufficient and therefore EBBR data is invalid. Appropriate fetch was determined from a 1/40 measurement height to fetch ratio, resulting in a required minimum fetch of 120 m. Particular attention should be paid to the limited valid wind directions for the Central Facility EBBR. The surface vegetation type for the EBBRs is grazed or ungrazed grassland (refer to the EFSCO for state). 5) Some conditions that commonly cause the EBBR primary measurements to be incorrect or missing follow: a) Sensible and latent heat fluxes are not accurate during times when the Automatic Exchange Mechanism (AEM) is not functioning properly. The AEM switches the gradient measuring instrumentation between the top and bottom positions every 15 minutes; this reduces the effects of instrument offsets. Sometimes the AEM does not reach it's full extent of travel, resulting in the home signal being zero. b) Sensible and latent heat fluxes are sometimes incorrect when surface soil heat flow is out of range, as seen in the average soil heat flux (ave_shf). c) Very light winds may be seen at nights for brief periods. Wind direction flops around a lot during low wind conditions (< 1.5 m/s) and is often unreliable during those periods. d) Missing data periods occur at times; this is usually a site data system collection/communication problem; it can also occur during replacement of the system with a newly calibrated unit. Missing data is sometimes filled in later from manual or automatic re-collection of the data. |
Measurements: | sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/07/2007 | 2130 | 08/13/2007 | 1600 |
08/19/2007 | 1300 | 08/29/2007 | 2130 |
Subject: | SGP/EBBR/E27 - Multiplexer #2 failure |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | A problem with the #2 Multiplexer caused a large number of measurements to be incorrect. Sensible and latent heat fluxes were often affected. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
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Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/22/2007 | 1800 | 03/26/2008 | 1730 |
Subject: | SGP/EBBR/E27 - Measurements offscale |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | All J-panel 4 measurements (soil heat flows, net radiation, air temperatures, home signals, pressure, vapor pressure) were sometimes offscale or otherwise incorrect. J-Panel was replaced 20080326 correcting the problem. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/26/2009 | 1800 | 01/28/2009 | 2145 |
Subject: | SGP/EBBR/E27 - Wind Speed Incorrect |
DataStreams: | sgp15ebbrE27.b1, sgp30ebbrE27.b1, sgp5ebbrE27.b1 |
Description: | The wind speed sensor was frozen stopped by freezing rain. |
Measurements: | sgp5ebbrE27.b1:
sgp15ebbrE27.b1:
sgp30ebbrE27.b1:
|