DQR ID | Subject | Affected Data Streams | Data Quality Metric |
---|---|---|---|
D070917.1 | SGP/EBBR/E13 - Radiometer dome broken | sgp30ebbrE13.b1 | Incorrect |
D961122.11 | SGP/EBBR/E13 - Wind Direction Incorrect | sgp30ebbrE13.b1 | Incorrect |
D030110.34 | SGP/EBBR/E13 - Data Incorrect during 6 month checks | sgp30ebbrE13.b1 | Incorrect |
D051106.24 | SGP/EBBR/E13 - Average Soil Heat Flux Incorrect | sgp30ebbrE13.b1 | Incorrect |
D020129.7 | SGP EBBR E13 - E13 EBBR Left Air Temperature Incorrect | sgp30ebbrE13.b1 | Suspect |
D010403.22 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D990127.32 | SGP/EBBR/E13 - Wind Speed Data Incorrect | sgp15ebbrE13.b1 | Incorrect |
D000531.5 | SGP/EBBR/E13 - Failed Right Humidity Probe | sgp5ebbrE13.b1 | Incorrect |
D160414.2 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect | sgp30ebbrE13.b1 | Incorrect |
D090313.13 | SGP/EBBR/E13 - Wind Speed Incorrect | sgp5ebbrE13.b1 | Incorrect |
D130410.6 | SGP/EBBR/E13 - Soil temp 4 failure | sgp30ebbrE13.b1 | Incorrect |
D980410.8 | SGP/EBBR/E13 - Wind Speed Sensor Frozen | sgp15ebbrE13.b1 | Incorrect |
D060111.9 | SGP/EBBR/E13 - Wind Speed Sensor Frozen | sgp5ebbrE13.b1 | Incorrect |
D020717.13 | SGP/EBBR/E13 - Reprocess: Soil Heat Flow #1 Incorrect | sgp30ebbrE13.b1 | Incorrect |
D970730.3 | SGP/EBBR/E13 - CR10 Malfunction | sgp30ebbrE13.b1 | Incorrect |
D020716.12 | SGP/EBBR/E13 - 6 Month Checks | sgp5ebbrE13.b1 | Incorrect |
D160512.2 | SGP/EBBR/E13 - Sensible and Latent Heat Flux Incorrect | sgp30ebbrE13.b1 | Suspect |
D030115.4 | SGP/EBBR/E13 - Wind Speed Stalling at Low Speeds | sgp30ebbrE13.b1 | Incorrect |
D020129.12 | SGP EBBR E13 - E13 EBBR Left T/RH Probe Temperature Incorrect | sgp30ebbrE13.b1 | Suspect |
D020131.13 | SGP/EBBR/E13 - Left T/RH Probe Temperature Incorrect | sgp30ebbrE13.b1 | Suspect |
D020214.1 | SGP/EBBR/E13 - Left Humidity Probe Temperature Incorrect | sgp30ebbrE13.b1 | Suspect |
D010403.20 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D031031.5 | SGP/EBBR/E13 - Water in Net Radiometer, Surface Fluxes Incorrect | sgp30ebbrE13.b1 | Incorrect |
D000301.3 | SGP/EBBR - EBBR E13 Net Radiation Incorrect | sgp30ebbrE13.b1 | Incorrect |
D061114.6 | SGP/EBBR/E13 - Battery failure | sgp30ebbrE13.b1 | Incorrect |
D010403.17 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D020129.10 | SGP/EBBR/E13 - Reprocess: E13 EBBR Soil heat Flows #1 and #2 Incorrect | sgp30ebbrE13.b1 | Incorrect |
D950815.2 | SGP/EBBR/E13 - Low Battery Voltage and AEM Left on Manual | sgp5ebbrE13.b1 | Incorrect |
D000628.1 | SGP/EBBR/E13- Left humidity probe replaced | sgp30ebbrE13.b1 | Incorrect |
D010403.37 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D010403.40 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp5ebbrE13.b1 | Incorrect |
D980117.19 | SGP/EBBR/E13- EBBR Frozen Wind Speed | sgp30ebbrE13.b1 | Incorrect |
D940511.2 | SGP/EBBR/E13 - SM4 Replacement | sgp30ebbrE13.b1 | Incorrect |
D040915.2 | SGP/EBBR/E13 - Net Radiation Incorrect, Fluxes Incorrect | sgp30ebbrE13.b1 | Incorrect |
D050207.6 | SGP/EBBR/E13 - Wind Direction Frozen Stopped By Ice Storm | sgp5ebbrE13.b1 | Incorrect |
D160104.7 | SGP Site Power Outage Due to Winter Storm | sgpirt200msE13.a1 | Note |
D151201.2 | SGP ALL INSTRUMENTS - Icing Event | sgp30baebbrE35.c1 | Note |
D110721.1 | SGP/EBBR/E13 - Soil temperature #3 offscale | sgp30ebbrE13.b1 | Suspect |
D060501.12 | SGP/EBBR/E13 - Missing Data | sgp30ebbrE13.b1 | Incorrect |
D010403.45 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp15ebbrE13.b1 | Incorrect |
D050624.7 | SGP/EBBR/E13 - Improved EBBR CR10 Program | sgp30ebbrE13.b1 | Note |
D030712.17 | SGP/EBBR/E13 - 6 Month Checks | sgp5ebbrE13.b1 | Incorrect |
D020717.17 | SGP/EBBR/E13 - AEM Hung up | sgp5ebbrE13.b1 | Incorrect |
D941208.1 | SGP/EBBR/E13 - Net Radiation - Hemisphere Replacement | sgp30ebbrE13.b1 | Incorrect |
D010605.5 | SGP EBBR E13 - E13 EBBR Soil T #4 Incorrect | sgp30ebbrE13.b1 | Incorrect |
D010412.1 | SGP/EBBR/E13 - E13 EBBR Soil Temperature #4 Suspect | sgp30ebbrE13.b1 | Suspect |
D060921.6 | SGP/EBBR/E13 - Pressure and Sensible and Latent Heat Fluxes Incorrect | sgp30ebbrE13.b1 | Incorrect |
D980529.10 | SGP/EBBR/E13 - Six Month Checks | sgp30ebbrE13.b1 | Incorrect |
D970330.1 | SGP/EBBR/E13 - Frozen Wind Speed Sensor | sgp30ebbrE13.b1 | Incorrect |
D100727.5 | SGP/EBBR/E13 - Incorrect Sensible and Latent Heat Fluxes | sgp30ebbrE13.b1 | Incorrect |
D020129.9 | SGP/EBBR/E13 - Reprocess: E13 EBBR Soil Temperature #4 Incorrect | sgp30ebbrE13.b1 | Suspect |
D060622.2 | SGP/EBBR/E13 - Fluxes Incorrect, AEM Problems | sgp5ebbrE13.b1 | Incorrect |
D031204.10 | SGP/EBBR/E13 - 6 Month Checks | sgp30ebbrE13.b1 | Incorrect |
D010403.38 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp5ebbrE13.b1 | Incorrect |
D050510.3 | SGP/EBBR/E13 - Net Radiometer Tilted Half Degree West | sgp30ebbrE13.b1 | Suspect |
D170216.7 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect | sgp30ebbrE13.b1 | Incorrect |
D990127.33 | SGP/EBBR - EBBR E13 Wind Speed Data Incorrect | sgp30ebbrE13.b1 | Suspect |
D041222.12 | SGP/EBBR/E13 - 6 Month Checks | sgp30ebbrE13.b1 | Incorrect |
D941021.5 | SGP/EBBR/E13 - Soil Temperature Aberations | sgp30ebbrE13.b1 | Incorrect |
D030115.6 | SGP/EBBR/E13 - AEM Jung between Home Positions | sgp5ebbrE13.b1 | Incorrect |
D080318.1 | SGP/EBBR/E13 - Wind direction failure | sgp5ebbrE13.b1 | Incorrect |
D980416.12 | SGP/EBBR/E13 - 3-Month Check | sgp30ebbrE13.b1 | Incorrect |
D060921.5 | SGP/EBBR/E13 - Soil Heat Flow #3 Large Negative | sgp30ebbrE13.b1 | Incorrect |
D010403.18 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D170724.4 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes and Net Radiation Incorrect | sgp5ebbrE13.b1 | Incorrect |
D010403.39 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D060501.13 | SGP/EBBR/E13 - Flux and Gradient Measurements Incorrect | sgp30ebbrE13.b1 | Incorrect |
D951116.1 | SGP/EBBR/E13 - AEM Exchange Stopped in Snow and Freezing Rain | sgp30ebbrE13.b1 | Incorrect |
D940106.5 | SGP/EBBR/E13 - Invalid data during disconnection of AEM at E13 | sgp30ebbrE13.b1 | Incorrect |
D130410.7 | SGP/EBBR/E13 - AEM failure | sgp30ebbrE13.b1 | Incorrect |
D051104.3 | SGP/EBBR/E13 - Loose connections | sgp30ebbrE13.b1 | Incorrect |
D000225.7 | SGP/EBBR - EBBR E13 Left Aspirator Not Working | sgp5ebbrE13.b1 | Incorrect |
D010403.3 | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D150707.2 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect When AEM Not Working | sgp30ebbrE13.b1 | Incorrect |
D040304.12 | SGP/EBBR/E13 - Wind Speed Frozen Stopped By Ice | sgp15ebbrE13.b1 | Incorrect |
D010413.2 | SGP/EBBR/E13 - E13 EBBR Soil Heat Flow #4 Incorrect | sgp30ebbrE13.b1 | Incorrect |
D931108.3 | SGP/EBBR/E13 - pressure calibration | sgp30ebbrE13.b1 | Suspect |
D010403.10 | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D010403.35 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp5ebbrE13.b1 | Incorrect |
D010403.36 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D020214.2 | SGP/EBBR/E13 - Data incorrect during maintenance | sgp5ebbrE13.b1 | Incorrect |
D010403.19 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D040304.13 | SGP/EBBR/E13 - Wind Direction Frozen Stopped By Ice | sgp5ebbrE13.b1 | Incorrect |
D010403.43 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D160212.3 | SGP - Data System Upgrades: Data Missing | sgp30ebbrE13.b1 | Missing |
D020129.8 | SGP/EBBR/E13 - Reprocess: E13 EBBR Soil Temperature #4 Incorrect | sgp30ebbrE13.b1 | Suspect |
D050206.10 | SGP/EBBR/E13 - Wind Speed Frozen Stopped By Ice Storm | sgp15ebbrE13.b1 | Incorrect |
D060921.7 | SGP/EBBR/E13 - Most Measurements Incorrect When Battery Voltage Too low | sgp30ebbrE13.b1 | Incorrect |
D030115.5 | SGP/EBBR/E13 - Reprocessed and Corrected: Soil Moisture #1 Offset1 | sgp30ebbrE13.b1 | Note |
D990415.1 | SGP/EBBR/E13 - Wind Speed Frozen | sgp30ebbrE13.b1 | Incorrect |
D020129.4 | SGP EBBR E13 - E13 EBBR AEM Home 30 Offset or AEM in Mid Position | sgp5ebbrE13.b1 | Suspect |
D051111.11 | SGP/EBBR/E13 - metadata corrections | sgp30ebbrE13.b1 | Note |
D020717.15 | SGP/EBBR/E13 - Wrong CR10 Program Installed | sgp30ebbrE13.b1 | Suspect |
D020717.14 | SGP/EBBR/E13 - Reprocess: Soil Heat Flow #2 Incorrect | sgp30ebbrE13.b1 | Incorrect |
D170726.11 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect | sgp30ebbrE13.b1 | Incorrect |
D140318.5 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Too Large, Net Radiation Too Large | sgp30ebbrE13.b1 | Incorrect |
D060501.14 | SGP/EBBR/E13 - Net Radiation and Fluxes Suspect | sgp30ebbrE13.b1 | Suspect |
D150908.1 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect | sgp30ebbrE13.b1 | Incorrect |
D960508.6 | SGP/EBBR/E13 - 3-month check | sgp5ebbrE13.b1 | Incorrect |
D010403.4 | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D960606.1 | SGP/EBBR/E13 - Annual Calibration changeout | sgp30ebbrE13.b1 | Incorrect |
D031222.17 | SGP/EBBR/E13 - Net Radiometer Iced Over During Storm | sgp30ebbrE13.b1 | Incorrect |
D010403.41 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D040608.6 | SGP/EBBR/E13 - Automatic Exchange Mechanism Failure | sgp5ebbrE13.b1 | Incorrect |
D950626.2 | SGP/EBBR/E13 - Frozen Wind Speed Sensor | sgp5ebbrE13.b1 | Incorrect |
D020717.16 | SGP/EBBR/E13 - Wind Direction Incorrect | sgp5ebbrE13.b1 | Incorrect |
D971021.5 | SGP/EBBR/E13 - EBBR Biannual Checks | sgp30ebbrE13.b1 | Incorrect |
D951220.6 | SGP/EBBR/E13 - battery voltage drop | sgp30ebbrE13.b1 | Incorrect |
D020129.11 | SGP EBBR E13 - E13 EBBR Data Incorrect | sgp5ebbrE13.b1 | Incorrect |
D930503.2 | SGP/EBBR/E13 - incorrect meteorological observations | sgp30ebbrE13.b1 | Incorrect |
D020726.2 | SGP/EBBR/E13 - Reprocess: Soil Heat Flow #1 and #2 Incorrect | sgp30ebbrE13.b1 | Incorrect |
D980117.27 | SGP/EBBR/E13 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown) | sgp30ebbrE13.b1 | Suspect |
D031222.16 | SGP/EBBR/E13 - Wind Speed Sensor Frozen By Ice Storm | sgp30ebbrE13.b1 | Incorrect |
D951113.1 | SGP/EBBR/E13 - Wind Direction Set Pin Slippage | sgp30ebbrE13.b1 | Incorrect |
D130410.5 | SGP/EBBR/E13 - Soil temp 5 offscale | sgp30ebbrE13.b1 | Incorrect |
D010403.6 | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D981112.5 | SGP/EBBR/E13 - Net Radiation Incorrect - Water in Bottom Dome | sgp30ebbrE13.b1 | Incorrect |
D020129.3 | SGP EBBR E13 - E13 EBBR AEM Home 30 Offset | sgp30ebbrE13.b1 | Incorrect |
D990127.34 | SGP/EBBR - EBBR E13 Wind Speed Data Incorrect | sgp30ebbrE13.b1 | Suspect |
D010403.8 | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D011127.27 | SGP EBBR E13 - E13 EBBR Data Incorrect During 6 Month Checks | sgp30ebbrE13.b1 | Incorrect |
D010413.1 | SGP/EBBR/E13 - E13 EBBR Wind Direction Iced | sgp30ebbrE13.b1 | Incorrect |
D020129.2 | SGP EBBR E13 - E13 EBBR AEM in Mid Position | sgp5ebbrE13.b1 | Suspect |
D060818.10 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect When Pressure Offscale | sgp5ebbrE13.b1 | Incorrect |
D020129.5 | SGP EBBR E13 - E13 EBBR Left Air Temperature Incorrect | sgp30ebbrE13.b1 | Suspect |
D950626.7 | SGP/EBBR/E13 - Reprocess: Soil Temperature Malfunction | sgp30ebbrE13.b1 | Incorrect |
D950626.1 | SGP/EBBR/E13 - Frozen Wind Speed Sensor | sgp5ebbrE13.b1 | Incorrect |
D010403.16 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D930428.2 | SGP/EBBR/E13 - incorrect home signal | sgp30ebbrE13.b1 | Incorrect |
D931108.4 | SGP/EBBR/E13 - solid moisture correction | sgp30ebbrE13.b1 | Suspect |
D021113.1 | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header | sgp30ebbrE9.b1 | Note |
D010403.44 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp5ebbrE13.b1 | Incorrect |
D051104.2 | SGP/EBBR/E13 - Fluxes Incorrect | sgp30ebbrE13.b1 | Incorrect |
D010403.9 | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D010403.2 | SGP/EBBR/E13 - E13 EBBR Heat Capacities Incorrect | sgp30ebbrE13.b1 | Incorrect |
D010403.42 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D020214.5 | SGP/EBBR/E13 - Data Incorrect During 6 Month Checks | sgp30ebbrE13.b1 | Incorrect |
D040915.6 | SGP/EBBR/E13 - AEM Failure, Fluxes Incorrect | sgp30ebbrE13.b1 | Incorrect |
D020723.1 | SGP/EBBR/E13 - Thermocouple out of range, data incorrect | sgp30ebbrE13.b1 | Incorrect |
D961122.24 | SGP/EBBR/E13 - EBBR 3 Month Checks - 10 EFs | sgp30ebbrE13.b1 | Incorrect |
D170614.1 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect | sgp30ebbrE13.b1 | Incorrect |
D030919.8 | SGP/EBBR/E13 - Water In Net Radiometer; Surface Fluxes are Incorrect | sgp5ebbrE13.b1 | Incorrect |
D140319.4 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes, and Net Radiation Incorrect | sgp30ebbrE13.b1 | Incorrect |
D951113.6 | SGP/EBBR/E13 - Battery voltage drop | sgp30ebbrE13.b1 | Incorrect |
D060622.1 | SGP/EBBR/E13 - Left Air Temperature Incorrect - Fluxes Affected | sgp5ebbrE13.b1 | Incorrect |
D130621.1 | SGP/EBBR/E13 - Incorrect sensible and latent heat fluxes | sgp30ebbrE13.b1 | Incorrect |
D020628.16 | SGP/EBBR/E13 - T/RH Check | sgp30ebbrE13.b1 | Incorrect |
D000531.4 | SGP/EBBR/E13 - failure of sensors | sgp30ebbrE13.b1 | Incorrect |
D160715.8 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect | sgp30ebbrE13.b1 | Incorrect |
D020129.13 | SGP EBBR E13 - E13 EBBR Left T/RH Probe Temperature Incorrect | sgp30ebbrE13.b1 | Suspect |
D950126.1 | SGP/EBBR/E13 - Incorrect Soil Temperature #4 | sgp30ebbrE13.b1 | Incorrect |
D150309.5 | SGP/EBBR/E13 - Reprocessed and Corrected: Incorrect data logger program | sgp30ebbrE13.b1 | Note |
D010403.24 | SGP/EBBR/E13 - E13 EBBR All Data Incorrect | sgp30ebbrE13.b1 | Incorrect |
D950828.1 | SGP/EBBR/E13 - Battery Voltage Drop | sgp5ebbrE13.b1 | Incorrect |
D050622.1 | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect (AEM failure) | sgp30ebbrE13.b1 | Incorrect |
D021113.4 | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header | sgp30ebbrE13.b1 | Note |
D101004.2 | SGP/EBBR/E13 - Net Radiation Too Large | sgp30ebbrE13.b1 | Incorrect |
D020628.2 | SGP/EBBR/E13 - 3-month Check | sgp5ebbrE13.b1 | Suspect |
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2006-09-02 | 04:00:00 | 2006-09-14 | 19:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Radiometer dome broken |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The top net radiometer dome was broken, yielding net radiation, sensible heat flux and latent heat flux that were too low. The BEFLUX (SIRS) net radiation can be used as a replacement for the EBBR net radiation. To correct the sensible and latent heat fluxes, determine the ratio of SIRS net radiation to EBBR net radiation for each daylight half hour and multiply that ratio times H and LE to obtain approximate corrected flux values. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1996-08-20 | 07:00:00 | 1996-08-30 | 18:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Direction Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-11-14 | 20:15:00 | 2002-11-14 | 20:45:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Data Incorrect during 6 month checks |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Some of the measurements are incorrect during the 6 month checks. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2005-03-03 | 21:30:00 | 2005-03-31 | 21:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Average Soil Heat Flux Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-01-25 | 05:30:00 | 2001-03-01 | 23:56:00 | Suspect |
Subject: | SGP EBBR E13 - E13 EBBR Left Air Temperature Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | This condition occurred most of the time during the indicated period (hence color yellow). The left air temperature was incorrect only when the AEM was in the home 30 position. This only affected the bottom air temperature calculation. However, it made the latent heat flux, sensible heat flux, and Bowen ratio incorrect. The sensor was improperly inserted into the aspirator shield and was pinched between the shield and the T/RH probe. When the AEM was in the home30 position, the aspirator hose position may have caused the sensor to short to ground. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-02-28 | 12:30:00 | 2000-02-28 | 12:31:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1999-01-08 | 02:05:00 | 1999-01-08 | 16:00:00 | Incorrect |
1998-12-21 | 00:15:00 | 1998-12-24 | 17:30:00 | Incorrect |
1999-01-01 | 15:15:00 | 1999-01-01 | 22:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Speed Data Incorrect |
---|---|
Affected Datastreams: | sgp15ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-07-17 | 22:00:00 | 1995-09-22 | 21:08:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Failed Right Humidity Probe |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | A lightning strike to the central cluster area on 17 July 1995 caused failure of several EBBR sensors including the right humidity probe. On July 24th, site operations removed the right humidity probe SN 460412 and replaced it with SN 460428 In less than a day the right humidity probe output soared to over 113% and has hovered around 112% since. I consider all right probe values to be incorrect due to this behavior. Without a properly functioning right humidity probe, all values of top and bottom relative humidity, top and bottom vapor pressure, Bowen ratio, and latent and sensible heat fluxes are incorrect. A working spare relative humidity probe was not available at that time. The probe was replaced with a working, calibrated probe on 22 September 1995 at about 2108 GMT. I have the examined the data since the day of the replacement and find that the new probe is working well. All E13 EBBR measurements are presently correct. The old probe S/N was 460428, the new S/N is 460413. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2016-02-27 | 21:30:00 | 2016-04-03 | 21:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Sensible and latent heat fluxes incorrect when the AEM home signal spikes. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2009-01-26 | 20:15:00 | 2009-01-28 | 20:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Speed Incorrect |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The wind speed sensor was stopped by freezing rain. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2013-01-13 | 23:00:00 | 2013-01-17 | 16:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Soil temp 4 failure |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil temperature 4 was incorrect, causing sensible and latent heat fluxes to be incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1998-01-15 | 10:15:00 | 1998-01-15 | 14:45:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Speed Sensor Frozen |
---|---|
Affected Datastreams: | sgp15ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2005-12-18 | 09:00:00 | 2005-12-20 | 16:00:00 | Incorrect |
2005-12-21 | 05:00:00 | 2005-12-21 | 18:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Speed Sensor Frozen |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The wind speed sensor was frozen to a stopped posiiton; wind speed data is incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-01-25 | 22:02:00 | 2002-03-03 | 11:29:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Reprocess: Soil Heat Flow #1 Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil Heat Flow #1 was incorrect during the indicated period. Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can be recalculated using the remaining good sets of soil sensors as follows: ave_shf = (g2 + g3 + g4 + g5)/4 e = -(q + ave_shf)/(1 + bowen) h = -(q + e + ave_shf) |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1997-07-17 | 09:30:00 | 1997-07-25 | 16:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - CR10 Malfunction |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-05-16 | 18:55:00 | 2002-05-16 | 19:26:00 | Incorrect |
Subject: | SGP/EBBR/E13 - 6 Month Checks |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The indicated measurements were incorrect during the 6 month checks. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2016-02-08 | 10:30:00 | 2016-05-05 | 20:00:00 | Suspect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Flux Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Sensible and Latent Heat Flux were sometimes incorrect when Soil Heat Flow 5 was incorrect. The EBBR unit was replaced not only to resolve problems with the unit, but to provide a newly calibrated unit for an IOP. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-09-23 | 00:00:00 | 2002-10-31 | 21:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Speed Stalling at Low Speeds |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Perhaps because of excessive bearing wear, the wind speed sensor had a high starting threshhold with wind speeds below about 2 m/s. Wind speed measurements at all speeds were probably too low. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-10-08 | 20:00:00 | 2001-10-12 | 17:31:00 | Suspect |
Subject: | SGP EBBR E13 - E13 EBBR Left T/RH Probe Temperature Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The left T/RH Probe Temperature was often incorrect, causing the other indicated measurements to be incorrect also. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-11-25 | 15:45:00 | 2001-12-28 | 19:31:00 | Suspect |
Subject: | SGP/EBBR/E13 - Left T/RH Probe Temperature Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | During much of the indicated period the Left T/RH Temperature was incorrect. Because the home signal was between 0 and 3, the temperature was incorrect when the AEM was at the bottom position, but was correct when the AEM was at the top position. This was caused by a short created when the sensor was mispositioned in the aspirator housing and enough strain on the cable for it to bring it into contact with the housing in the bottom position. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-01-18 | 00:05:00 | 2002-01-25 | 22:01:00 | Suspect |
Subject: | SGP/EBBR/E13 - Left Humidity Probe Temperature Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The left humidity probe temperature was incorrect much of the time, as was the top humidity temperature and vapor pressure. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-11-13 | 00:15:00 | 2000-11-14 | 00:31:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2003-09-29 | 18:00:00 | 2003-10-02 | 18:45:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Water in Net Radiometer, Surface Fluxes Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1999-09-20 | 19:30:00 | 1999-09-23 | 19:30:00 | Incorrect |
Subject: | SGP/EBBR - EBBR E13 Net Radiation Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2006-10-17 | 07:00:00 | 2006-10-23 | 16:15:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Battery failure |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Battery voltage dropped below 10.5 V, causing all measurements to be incorrect or suspect. Data was missing entirely on parts of 10/22 and 10/23. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-11-06 | 01:30:00 | 2000-11-06 | 04:31:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Low battery voltage caused all data to be incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-10-05 | 17:00:00 | 2002-01-18 | 00:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Reprocess: E13 EBBR Soil heat Flows #1 and #2 Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil Heat Flow probes #1 and #2 were incorrect during the indicated period (and for some time afterward, to be covered in another DQR). Outputs from the probes were typically too large negative or too large positive. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-08-01 | 15:00:00 | 1995-08-02 | 16:15:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Low Battery Voltage and AEM Left on Manual |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-07-17 | 22:00:00 | 1995-07-25 | 19:30:00 | Incorrect |
Subject: | SGP/EBBR/E13- Left humidity probe replaced |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | A lightning strike to the central cluster area on 17 July 1995 caused the left humidity probe to fail. Some of the period of incorrect data has been discussed in D0000531.4. The left humidity probe was replaced on 25 July 1995 at 1925 GMT (old SN 460413, new SN 460435). |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-08 | 13:00:00 | 2000-03-08 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-13 | 13:00:00 | 2000-03-13 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1998-01-04 | 06:25:00 | 1998-01-05 | 01:15:00 | Incorrect |
Subject: | SGP/EBBR/E13- EBBR Frozen Wind Speed |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Wind speed cups were frozen during the indicated time periods. All 5, 15, and 30 minute data values indicated are incorrect for the periods listed. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1994-05-06 | 15:15:00 | 1994-05-06 | 16:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - SM4 Replacement |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2004-08-11 | 02:30:00 | 2004-08-11 | 18:24:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Net Radiation Incorrect, Fluxes Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Rain entered the net radiometer through a crack in the upper dome and settled in the bottom dome. This caused too large net radiation measurements during the following daylight hours, until the domes were replaced and dried out the same day. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2005-01-05 | 06:25:00 | 2005-01-07 | 18:50:00 | Incorrect |
2005-01-11 | 15:45:00 | 2005-01-12 | 09:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Direction Frozen Stopped By Ice Storm |
---|---|
Affected Datastreams: | sgp5ebbrE13.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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2015-12-26 | 00:00:00 | 2016-01-01 | 23:59:59 | Note |
Subject: | SGP Site Power Outage Due to Winter Storm |
---|---|
Affected Datastreams: | sgpirt200msE13.a1 |
Description | On Saturday and Sunday, December 26 and 27th a powerful winter storm (Goliath) brought sleet and freezing rain to much of Oklahoma with wind gusts of 45 MPH at times. The result was very very slick roads and mass power outages. The SGP central facility lost power at 8:55 PM CDT on Sunday, December 27th. The power was restored on 7:56 PM CDT on Wednesday, December 30th Site Emergency procedures were activated and Technicians drained water out of instrument reservoirs and other measures as needed, early Monday morning. On Wednesdays as roads and power started was restored to much of the areas east of I-35 , Site Technicians performed maintenance on several Extended Facilities. During this period, data are potentially missing, incorrect, or suspect. Carefully inspect the data before use. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2015-11-27 | 00:00:00 | 2015-11-30 | 23:59:59 | Note |
Subject: | SGP ALL INSTRUMENTS - Icing Event |
---|---|
Affected Datastreams: | sgp30baebbrE35.c1 |
Description | An icing event (winter storm Cara) passed slowly through the area during this time frame. Instruments at the SGP may have been affected by ice accumulation. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2011-06-30 | 15:00:00 | 2011-07-15 | 14:00:00 | Suspect |
Subject: | SGP/EBBR/E13 - Soil temperature #3 offscale |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil Temp Sensor 3 data were missing or offscale due to a bad connection. H and LE were not normally affected, as the EBBR program "kicked" out the incorrect temperature measurements before calculating H and LE. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2006-02-17 | 20:05:00 | 2006-02-20 | 10:30:00 | Incorrect |
2006-01-06 | 17:30:00 | 2006-01-09 | 07:30:00 | Incorrect |
2006-01-10 | 13:30:00 | 2006-01-10 | 19:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Missing Data |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The Data was missing during these three periods for various reasons. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-27 | 13:00:00 | 2000-03-27 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp15ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-04-01 | 00:00:00 | 2005-03-31 | 21:00:00 | Note |
Subject: | SGP/EBBR/E13 - Improved EBBR CR10 Program |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Effective 20050331.2100, the EBBR.E13 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 20050331, 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 sgp30ebbrE13.b1 data stream. The earlier version of the CR10 program was also used on previous EBBR datastream names (e.g. sgp30ebbrE13.a1). |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2003-05-01 | 19:05:00 | 2003-05-01 | 19:35:00 | Incorrect |
Subject: | SGP/EBBR/E13 - 6 Month Checks |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-05-07 | 00:00:00 | 2002-05-07 | 00:01:00 | Incorrect |
2002-03-09 | 09:45:00 | 2002-03-09 | 20:01:00 | Incorrect |
2002-05-11 | 15:30:00 | 2002-05-11 | 16:01:00 | Incorrect |
2002-05-07 | 17:00:00 | 2002-05-07 | 17:31:00 | Incorrect |
2002-05-08 | 23:00:00 | 2002-05-09 | 01:01:00 | Incorrect |
2002-03-08 | 14:15:00 | 2002-03-09 | 09:31:00 | Incorrect |
2002-05-07 | 03:00:00 | 2002-05-07 | 03:01:00 | Incorrect |
2002-05-11 | 19:00:00 | 2002-05-11 | 19:01:00 | Incorrect |
2002-04-17 | 15:30:00 | 2002-04-17 | 17:01:00 | Incorrect |
2002-05-07 | 04:00:00 | 2002-05-07 | 04:01:00 | Incorrect |
2002-05-06 | 06:00:00 | 2002-05-06 | 19:31:00 | Incorrect |
2002-04-17 | 22:30:00 | 2002-04-17 | 22:31:00 | Incorrect |
2002-04-18 | 12:30:00 | 2002-04-18 | 12:31:00 | Incorrect |
2002-04-16 | 22:30:00 | 2002-04-17 | 00:31:00 | Incorrect |
2002-03-12 | 00:00:00 | 2002-03-12 | 01:01:00 | Incorrect |
2002-01-18 | 00:15:00 | 2002-03-03 | 08:01:00 | Incorrect |
2002-04-16 | 14:30:00 | 2002-04-16 | 20:01:00 | Incorrect |
2002-03-12 | 01:15:00 | 2002-04-12 | 19:01:00 | Incorrect |
2002-03-03 | 08:15:00 | 2002-03-08 | 14:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - AEM Hung up |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The automatic exchange mechanism hung numerous times, but with various different measurements of home signals. In all cases, temperature and humidity gradients were incorrect; thus the Bowen ratio, sensible heat flux, and latent heat flux are incorrect for the indicated periods. Even when the home 15 and 30 signals were different (but too high) the measurements were incorrect because the program keys off of the home signals, which must be in the proper ranges. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1994-12-02 | 19:37:00 | 1994-12-02 | 20:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Net Radiation - Hemisphere Replacement |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1999-09-29 | 00:00:00 | 2001-03-08 | 19:31:00 | Incorrect |
Subject: | SGP EBBR E13 - E13 EBBR Soil T #4 Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil Temperature #4 floated around, causing average soil heat flow to sometimes be too small (resulting too small a sensible heat flux and too large a latent heat flux) or too large (resulting in too large a sensible heat flux and too small a latent heat flux). Investigation of g4 will indicate when these conditions occurred and the likely effect on sensible and latent heat fluxes. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-02-01 | 00:00:00 | 2000-12-31 | 00:00:00 | Suspect |
Subject: | SGP/EBBR/E13 - E13 EBBR Soil Temperature #4 Suspect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil Temperature #4 produced noisy measurements, resulting in quantities calculated from it to be of suspect quality. This condition normally occurred early in the GMT day. Sensible (h) and latent (e) heat fluxes were not normally greatly affected. Average surface heat flow was normally slightly underestimated. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2006-08-22 | 16:30:00 | 2006-08-22 | 18:30:00 | Incorrect |
2006-08-29 | 08:30:00 | 2006-08-29 | 12:00:00 | Incorrect |
2006-08-24 | 15:30:00 | 2006-08-24 | 20:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Pressure and Sensible and Latent Heat Fluxes Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | During spikes in pressure upwards or downwards the sensible and latent heat fluxes were incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1998-05-07 | 20:00:00 | 1998-05-07 | 20:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Six Month Checks |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1997-02-07 | 05:30:00 | 1997-02-07 | 13:40:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Frozen Wind Speed Sensor |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2010-07-06 | 19:30:00 | 2010-07-21 | 14:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Incorrect Sensible and Latent Heat Fluxes |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The multiplexer to which the air temperatures were connected experienced a problem, resulting in incorrect sensible and latent heat fluxes at times. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-04-01 | 00:00:00 | 2001-10-05 | 14:01:00 | Suspect |
Subject: | SGP/EBBR/E13 - Reprocess: E13 EBBR Soil Temperature #4 Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil Temperature #4 was often incorrect, typically too large negative, during this period, causing other measurements calculated with it to be incorrect also. This was caused by a bad multiplexor channel, which was discovered by the vendor during recalibration of the unit later. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2006-04-30 | 21:00:00 | 2006-05-01 | 15:30:00 | Incorrect |
2006-06-05 | 23:30:00 | 2006-06-06 | 16:00:00 | Incorrect |
2006-06-14 | 20:30:00 | 2006-06-15 | 14:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Fluxes Incorrect, AEM Problems |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The AEM did not function properly, thus sensible and latent heat fluxes were incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2003-10-13 | 18:30:00 | 2003-10-13 | 19:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - 6 Month Checks |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-05 | 13:00:00 | 2000-03-05 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2005-02-11 | 14:30:00 | 2005-05-13 | 19:00:00 | Suspect |
Subject: | SGP/EBBR/E13 - Net Radiometer Tilted Half Degree West |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The net radiation daily peak on sunny days occured 1/2 hour after the net radiation peak at E2, E9, and the SIRS because the sensor was tipped to the west about 1/2 degree. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2017-01-11 | 05:30:00 | 2017-01-12 | 20:00:00 | Incorrect |
2017-01-15 | 00:00:00 | 2017-01-15 | 14:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Sensible and latent heat fluxes were incorrect when the AEM was not working. This occurred again on 1/15/2017 because of an ice storm. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1999-01-01 | 15:15:00 | 1999-01-01 | 22:30:00 | Suspect |
Subject: | SGP/EBBR - EBBR E13 Wind Speed Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2004-10-28 | 18:30:00 | 2004-10-28 | 19:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - 6 Month Checks |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1994-10-13 | 23:00:00 | 1994-10-14 | 19:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Soil Temperature Aberations |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | For a period of not quite a day, soil temperature probe #4 indicated values that were either too high or too low, for unknown reasons. After Site Operations personnel checked connectors and the probe itself, it recovered to proper values. The probe has functioned properly since then. The times and incorrect data fields are listed below. 15 minute: rr_ts4, 10/13/94: 2245 GMT; 10/14/94: 0000, 0200, 0230, 0515, 0600, 0630, 1300-1500, 1530-1715, 1815, 1845 GMT 30 minute: ts4, 10/13/94: 2300 GMT; 10/14/94: 0000, 0230, 0530-0630, 1300-1700, 1830-1900 GMT ces4, g4, ave_shf, e, h, 10/14/94: 0030, 0200-0230, 0600-0630, 1300-1900 GMT |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-09-18 | 12:10:00 | 2002-09-19 | 02:45:00 | Incorrect |
Subject: | SGP/EBBR/E13 - AEM Jung between Home Positions |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | When the AEM (Automatic Exchange Mechanism) is hung inbetween home positions, the gradients of temperature and relative humidity, and thus sensible and latent heat fluxes, are incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2008-03-18 | 10:00:00 | 2008-03-27 | 19:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind direction failure |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The EBBR wind direction was stuck at 135 degrees; this reading indicates a failure of the sensor electronics. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1997-10-10 | 18:50:00 | 1997-10-10 | 19:32:00 | Incorrect |
Subject: | SGP/EBBR/E13 - 3-Month Check |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2006-08-23 | 17:00:00 | 2006-08-25 | 17:00:00 | Incorrect |
2006-08-05 | 17:30:00 | 2006-08-10 | 17:30:00 | Incorrect |
2006-08-31 | 20:30:00 | 2006-09-01 | 19:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Soil Heat Flow #3 Large Negative |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | During this period Soil Heat Flow #3 was sometimes incorrect (large negative); during those times, sensible and latent heat fluxes and average soil heat flux were sometimes (but not always incorrect). |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-11-06 | 01:20:00 | 2000-11-06 | 22:55:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | All data was incorrect for an unknown reason. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2017-07-07 | 15:00:00 | 2017-07-14 | 13:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes and Net Radiation Incorrect |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | Sensible and latent heat flux incorrect because of net radiation values that were too high, caused by water in the bottom dome. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-01 | 13:00:00 | 2000-03-01 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2006-01-22 | 23:30:00 | 2006-01-26 | 20:40:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Flux and Gradient Measurements Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The AEM hung in one position; flux and gradient measurements were therefore incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-11-11 | 07:00:00 | 1995-11-11 | 07:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - AEM Exchange Stopped in Snow and Freezing Rain |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | On the night of November 10-11, a north-south line from south central Kansas through south central Oklahoma received snow and freezing rain and experienced below freezing temperatures. This caused the EBBR automatic exchange mechanism (AEM) to stop exchanging temporarily. Note that temperatures, relative humidities, and vapor pressures are not affected; these are correct as measured, but the height at which the measurements occurred must be determined from the home signal value. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1993-12-31 | 19:50:00 | 1993-12-31 | 21:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Invalid data during disconnection of AEM at E13 |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2013-02-20 | 16:00:00 | 2013-02-28 | 20:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - AEM failure |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The AEM mechanism failed, causing sensible and latent heat fluxes to be incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2005-08-17 | 22:30:00 | 2005-10-05 | 16:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Loose connections |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The tair_bot spiked around midday, as if it is temperature related, and may have indicated a loose connection. The sensible and latyent heat fluxes and Bowen ratio were incorrect when this condition occurred. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-01-13 | 21:15:00 | 2000-01-13 | 21:30:00 | Incorrect |
Subject: | SGP/EBBR - EBBR E13 Left Aspirator Not Working |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-02-01 | 00:00:00 | 2000-02-23 | 14:31:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions. Incorrect Bowen ratio, and latent and sensible heat fluxes resulted. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2015-06-13 | 03:30:00 | 2015-06-26 | 16:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect When AEM Not Working |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Sensible and Latent Heat Fluxes were incorrect when the AEM was not working. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2004-02-09 | 11:25:00 | 2004-02-09 | 15:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Speed Frozen Stopped By Ice |
---|---|
Affected Datastreams: | sgp15ebbrE13.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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-08-13 | 19:30:00 | 2001-01-12 | 20:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR Soil Heat Flow #4 Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil Heat Flow #4 was large positive or negative, but always incorrect during the indicated period. This resulted in overestimates or underestimates of laetnt and sensible heat fluxes and average soil heat flow. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1993-07-13 | 12:00:00 | 1993-11-02 | 21:21:00 | Suspect |
Subject: | SGP/EBBR/E13 - pressure calibration |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | In the original Campbell CR10 software provided by the vendor (version 1), the EBBR had incorrect calibration pressure sensor slopes and offsets. The slopes and offset was carried through into version 2 of the software and was not discovered by the mentor (me) until sometime later. The calibration and slope did not deleteriously affect calculations in the program since only a four percent reduction in atmospheric pressure measurement resulted (the calculations are not very sensitive to small errors in pressure). The vendor does not recall how the wrong calibrations came to be used. Version 4 of the CR10 program includes the proper calibration and offset. This remedies the apparent offset problem (it was actually a calibration and offset problem). In comparisons with the co-located SMOS pressure sensor, the difference between the SMOS and EBBR pressure values appeared almost constant with time, hence the assumption of an offset problem. However, the EBBR pressure sensor offsets are so large (a consequence of tailoring the calibration curve to a small range of elevations in which the calibration applies) that the very small error in slope was difficult to recognize. The outputted pressure values for the EBBR system can be corrected with the following information and equations. Old Slope Old Offset New Slope New Offset 0.01952 81.24 0.02031 81.27 Correct Pressure = ((Current Pressure Data - 81.24)*0.02031/0.01952) + 81.27 = 1.04047*(Current Pressure Data) - 3.258 |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-01-04 | 17:30:00 | 2001-01-04 | 17:31:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions. Incorrect Bowen ratio, and latent and sensible heat fluxes resulted. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-12 | 13:00:00 | 2000-03-12 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-11 | 13:00:00 | 2000-03-11 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-01-25 | 22:00:00 | 2002-01-25 | 22:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Data incorrect during maintenance |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The 5, 15, and 30 minute measurements were zero or offscale at 2200 GMT only. Electronic connections were being checked at that time. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-11-12 | 09:45:00 | 2000-11-12 | 11:16:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2004-02-02 | 00:40:00 | 2004-02-03 | 18:10:00 | Incorrect |
2004-02-09 | 11:25:00 | 2004-02-09 | 15:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Direction Frozen Stopped By Ice |
---|---|
Affected Datastreams: | sgp5ebbrE13.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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-23 | 13:00:00 | 2000-03-23 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2016-01-26 | 18:00:00 | 2016-01-27 | 21:45:59 | Missing |
Subject: | SGP - Data System Upgrades: Data Missing |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The data system was undergoing upgrades. Data were lost during this period. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-03-08 | 19:35:00 | 2001-03-31 | 23:56:00 | Suspect |
Subject: | SGP/EBBR/E13 - Reprocess: E13 EBBR Soil Temperature #4 Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil Temperature #4 was often incorrect, typically too large negative, during this period, causing other measurements calculated with it to be incorrect also. This was caused by a bad multiplexor channel, which was discovered by the vendor during recalibration of the unit later. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2005-01-05 | 05:10:00 | 2005-01-08 | 17:45:00 | Incorrect |
2005-01-11 | 04:45:00 | 2005-01-12 | 13:10:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Speed Frozen Stopped By Ice Storm |
---|---|
Affected Datastreams: | sgp15ebbrE13.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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2006-08-28 | 00:30:00 | 2006-08-28 | 07:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Most Measurements Incorrect When Battery Voltage Too low |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Most measurements were incorrect during this period because the battery voltage was below 10.5 volts. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-10-05 | 17:50:00 | 2002-02-22 | 21:00:00 | Note |
Subject: | SGP/EBBR/E13 - Reprocessed and Corrected: Soil Moisture #1 Offset1 |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | DATA REPROCESSED and CORRECTED: Soil moisture sensor #1 offset was incorrect. Measurements were corrected by correcting the offset and recalculating sensible and latent heat fluxes. The data were archived in March 2017. Please retrieve the reprocessed data for use in your analysis. You may find these data using the ARM Discovery tool at the following link: http://www.archive.arm.gov/discovery/#v/results/s/finst::ebbr/fsite::sgp/ffac::sgp.E13 ORIGINAL DQR CATEGORY: Red( Incorrect) REPROCESSED and CORRECTED DATA ARCHIVED:2017-03 REPROCESS IDENTIFICATION NUMBER: RID 229 --------------------------------------------------- --- ORIGINAL DQR DESCRIPTION --- --------------------------------------------------- The wrong offset (1.4656) was used in the calibration coefficients for Soil Moisture Probe #1. The correct offset is 14.656. Sensible and Latent Heat Flux measurements are not significantly affected. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1999-03-13 | 23:30:00 | 1999-03-14 | 05:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Speed Frozen |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Wind speed and residual wind speed during this period are incorrect caused by an ice storm. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-10-09 | 22:45:00 | 2001-10-12 | 13:01:00 | Suspect |
Subject: | SGP EBBR E13 - E13 EBBR AEM Home 30 Offset or AEM in Mid Position |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The AEM stopped before reaching the end of it's travel, causing the home signals to be between 0 and 3 during part of this period. The AEM home30 signal is offset by approximately 25 during part of this period; it appears that the electronics of the AEM is adding the home15 and home30 voltages together when the AEM is in the home30 position. All gradient data, sensible heat flux, latent heat flux, and the Bowen ratio are incorrect during these conditions. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2003-10-13 | 00:00:00 | 2005-07-22 | 23:59:00 | Note |
Subject: | SGP/EBBR/E13 - metadata corrections |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | On 20050723, a series of metadata corrections and additions were completed. These metadata changes apply to all EBBR.E13 data collected by ARM back to the installation of the instrument in September 1992. 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 systems 3) Correction of soil type 4) Correction of soil moisture units (from "by volume" to "gravimetric") |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-10-05 | 17:15:00 | 2002-02-22 | 21:31:00 | Suspect |
Subject: | SGP/EBBR/E13 - Wrong CR10 Program Installed |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | An old version 4 program was installed on 5 Oct 01 instead of the correct version 8 program. All of the indicated measurements are suspect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-03-07 | 20:32:00 | 2002-05-20 | 21:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Reprocess: Soil Heat Flow #2 Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil Heat Flow #2 was incorrect during the indicated period. Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can be recalculated using the remaining good sets of soil sensors as follows: ave_shf = (g1 + g3 + g4 + g5)/4 e = -(q + ave_shf)/(1 + bowen) h = -(q + e + ave_shf) |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2017-07-12 | 12:30:00 | 2017-07-24 | 16:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Sensible and latent heat fluxes were incorrect when the AEM was not working, which was most of the time during this period. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2013-05-30 | 17:15:00 | 2013-06-06 | 13:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Too Large, Net Radiation Too Large |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The net radiometer top dome broke and water entered the dome. The water settled in the bottom dome and caused net radiation measurements to be too large. Sensible and latent heat fluxes are therefore calculated to be too large. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2006-04-02 | 03:30:00 | 2006-04-05 | 14:35:00 | Suspect |
Subject: | SGP/EBBR/E13 - Net Radiation and Fluxes Suspect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The net radiometer had water in it, making the net radiation and flux measurements suspect; the latter do not appear to be incorrect, but should be considered as suspect anyway. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2015-08-18 | 14:00:00 | 2015-08-21 | 21:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | During the start day and end day the AEM did not work for part of the day, resulting in incorrect sensible and latent heat fluxes at those times. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1996-05-06 | 17:55:00 | 1996-05-06 | 18:35:00 | Incorrect |
Subject: | SGP/EBBR/E13 - 3-month check |
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Affected Datastreams: | sgp5ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-03 | 00:00:00 | 2000-03-04 | 15:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions. Incorrect Bowen ratio, and latent and sensible heat fluxes resulted. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1996-05-24 | 18:00:00 | 1996-05-24 | 21:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Annual Calibration changeout |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2003-12-14 | 17:30:00 | 2003-12-14 | 18:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Net Radiometer Iced Over During Storm |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The net radiometer was covered with ice from a storm. Net radiation values are incorrect, and are sometimes even negative during the daytime. Sensible and latent heat fluxes are therefore incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-15 | 13:00:00 | 2000-03-15 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2004-06-05 | 01:30:00 | 2004-07-14 | 15:15:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Automatic Exchange Mechanism Failure |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The AEM was stuck in the home_15 position or reported near zero home signals during much of the indicated period. The Bowen ratio and latent and sensible heat fluxes were incorrect when the AEM was not operating properly; the periods of incorrect data can be determined from the home signal values. On 7/14/04 the AEM was replaced. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-03-07 | 02:45:00 | 1995-03-08 | 16:40:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Frozen Wind Speed Sensor |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-05-24 | 06:00:00 | 2002-06-14 | 14:31:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Direction Incorrect |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The wind direction and sigma_wd was near zero for the indicated times. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1997-04-28 | 14:19:00 | 1997-04-28 | 14:45:00 | Incorrect |
Subject: | SGP/EBBR/E13 - EBBR Biannual Checks |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-12-09 | 05:30:00 | 1995-12-09 | 14:15:00 | Incorrect |
1995-12-13 | 23:00:00 | 1995-12-14 | 14:30:00 | Incorrect |
1995-12-13 | 04:00:00 | 1995-12-13 | 18:00:00 | Incorrect |
1995-12-15 | 07:45:00 | 1995-12-15 | 15:15:00 | Incorrect |
Subject: | SGP/EBBR/E13 - battery voltage drop |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-10-05 | 17:15:00 | 2001-10-05 | 17:31:00 | Incorrect |
Subject: | SGP EBBR E13 - E13 EBBR Data Incorrect |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The 5 and 15 minute data was zero and thus the thirty minute data was also incorrect. This occurs after the restart of an EBBR system, in this case after a recalibration unit changeout. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1993-07-13 | 12:01:00 | 1993-07-13 | 12:02:00 | Incorrect |
Subject: | SGP/EBBR/E13 - incorrect meteorological observations |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | EDITOR'S NOTE: This DQR refers ti data collected by the EBBR at E13 prior to the begin date of regular ARM data. At that time, the data streams which contain the EBBR.E13 data were named Dsgp15ebbr1.a0 Dsgp30ebbr1.a1 Dsgp5ebbr1.a0 These data are not readily available from the ARM archive, but can be made available by special request. The actual time range of the problem described here is 930417.1200-930422.1730. Beginning at 1200 UTC on 17 April 1993, EBBR1, Central Facility, outputs ramped to extreme values, some positive, some negative. These outputs ended their ramping approximately 3 hours later. Comparison with SMOS data indicate that no time averaged outputs from EBBR1 were consistent with the SMOS after 1200 UTC. It appears that the averaging instruction in the CR10 data logger had been corrupted. On 22 April site operations, at my request, tried to reenter the software; this attempt was completely unsuccessful, indicating that the CR10 probably had other problems as well. EBBR1 was offline from 1730 UTC on 22 April until 1400 UTC on 23 April, when a new CR10 was installed and the software downloaded successfully. Since a SDS utility for extracting real time data from the CF SMOS had not been established, EBBR1 was being used for weather observations. All EBBR1 measurements of meteorological quantities during the period above are invalid. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-01-18 | 00:15:00 | 2002-01-25 | 22:01:00 | Incorrect |
2002-03-03 | 11:30:00 | 2002-03-07 | 20:31:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Reprocess: Soil Heat Flow #1 and #2 Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil Heat Flow #1 and #2 were incorrect during the indicated period. Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can be recalculated using the remaining good sets of soil sensors as follows: ave_shf = (g3 + g4 + g5)/3 e = -(q + ave_shf)/(1 + bowen) h = -(q + e + ave_shf) |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1998-01-04 | 07:45:00 | 1998-01-16 | 16:00:00 | Suspect |
Subject: | SGP/EBBR/E13 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown) |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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: Note: Mentor supplied the end date/time for this DQR after submittal |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2003-12-09 | 21:45:00 | 2003-12-10 | 01:15:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Speed Sensor Frozen By Ice Storm |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The wind speed sensor was frozen stopped by ice from a storm. The wind speed and residual wind speed measurements are incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-10-26 | 00:00:00 | 1995-11-03 | 20:45:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Wind Direction Set Pin Slippage |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2012-11-21 | 13:30:00 | 2012-12-06 | 15:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Soil temp 5 offscale |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Soil temperature 5 went offscale, causing sensible and latent heat fluxes to be incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-17 | 17:30:00 | 2000-03-23 | 19:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions. Incorrect Bowen ratio, and latent and sensible heat fluxes resulted. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1998-10-02 | 03:45:00 | 1998-10-08 | 19:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Net Radiation Incorrect - Water in Bottom Dome |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-12-28 | 19:30:00 | 2002-01-18 | 00:01:00 | Incorrect |
2001-10-12 | 13:15:00 | 2001-11-25 | 15:41:00 | Incorrect |
Subject: | SGP EBBR E13 - E13 EBBR AEM Home 30 Offset |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The AEM home30 signal is offset by approximately 25; it appears that the electronics of the AEM is adding the home15 and home30 voltages together when the AEM is in the home30 position. All gradient data, sensible heat flux, latent heat flux, and the Bowen ratio are incorrect during this condition. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1999-01-08 | 02:05:00 | 1999-01-08 | 16:00:00 | Suspect |
Subject: | SGP/EBBR - EBBR E13 Wind Speed Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-12-14 | 02:00:00 | 2000-12-14 | 23:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions. Incorrect Bowen ratio, and latent and sensible heat fluxes resulted. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-04-20 | 17:20:00 | 2001-04-20 | 17:49:00 | Incorrect |
2001-10-04 | 18:35:00 | 2001-10-04 | 19:34:00 | Incorrect |
Subject: | SGP EBBR E13 - E13 EBBR Data Incorrect During 6 Month Checks |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The data was incorrect during the 6 month checks. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-12-11 | 00:00:00 | 2000-12-14 | 19:31:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR Wind Direction Iced |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The wind direction sensor was iced stopped for the indicated period. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-10-09 | 02:45:00 | 2001-10-09 | 21:45:00 | Suspect |
2001-11-25 | 15:45:00 | 2001-12-28 | 19:31:00 | Suspect |
Subject: | SGP EBBR E13 - E13 EBBR AEM in Mid Position |
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Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The AEM stopped before reaching the end of it's travel, causing the home signals to be between 0 and 3 during much of this period (therefore the data is colored yellow). All gradient data, sensible heat flux, latent heat flux, and the Bowen ratio are incorrect during this condition. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2006-07-01 | 17:00:00 | 2006-07-06 | 22:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect When Pressure Offscale |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | There were several half hours during this period when the pressure went offscale or at least to a high value, causing the sensible and latent heat fluxes to be incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-04-01 | 00:00:00 | 2001-10-05 | 14:01:00 | Suspect |
Subject: | SGP EBBR E13 - E13 EBBR Left Air Temperature Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | This condition occurred most of the time during the indicated period (hence color yellow). The left air temperature was incorrect only when the AEM was in the home 30 position. This only affected the bottom air temperature calculation. However, it made the latent heat flux, sensible heat flux, and Bowen ratio incorrect. The sensor was improperly inserted into the aspirator shield and was pinched between the shield and the T/RH probe. When the AEM was in the home30 position, the aspirator hose position may have caused the sensor to short to ground. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-02-17 | 14:00:00 | 1995-02-22 | 15:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Reprocess: Soil Temperature Malfunction |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | For several days, soil temperature probe #4 indicated values that were either too high or too low, for unknown reasons. After Site Operations personnel checked connections, it recovered to proper values. Affected quantities are shown below. 15 minute: rr_ts4 30 minute: ts4, ces4, g4, ave_shf, e, h Sensible, latent, and soil heat fluxes need to be recalculated using the change in energy storage of probes 1-3 and 5, as follows. ave_shf = (g1 + g2 + g3 + g5)/4 e = -(q + ave_shf)/(1 +bowen) h = -(e + ave_shf +q) |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-02-14 | 11:00:00 | 1995-02-14 | 17:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Frozen Wind Speed Sensor |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-16 | 21:30:00 | 2000-03-19 | 17:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Low battery voltage caused all data to be incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1993-07-13 | 12:01:00 | 1993-07-13 | 12:02:00 | Incorrect |
Subject: | SGP/EBBR/E13 - incorrect home signal |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | EDITOR'S NOTE: This DQR refers to data collected by the EBBR at E13 prior to the begin date of regular ARM data. At that time, the data streams which contain the EBBR.E13 data were named Dsgp15ebbr1.a0 Dsgp30ebbr1.a1 Dsgp5ebbr1.a0 These data are not readily available from the ARM archive, but can be made available by special request. The actual time range of the problem described here is 921230.0000-930423.1200. EBBR1, Central Facility reported incorrect home value signals from 30 December 1992 through 23 April 1993. The home signals are used in the calculation of fluxes by the CR10 data logger. The fluxes for this period are thus invalid as reported and must be recalculated from the archived 15 minute data. The proper home signals are less than 35 for 30 minute home signal and greater than 35 for 15 minute home signal. Home signals were the same value for 15 minute and 30 minute during the period of interest, although they were not a constant value. The chronology of the situation is reported below. On 7 April 1993 I noticed the problem in the A0 data. On 30 December 1992, the automatic exchange mechanism (AEM) of the Central Facility EBBR froze up with ice and stopped working (surmised from looking at the EBBR1 data). This caused a fuse to blow and stop the mechanism from operating. However, one channel of the CR10 data logger was apparently damaged in the process. The condition of the AEM only, was noticed on 4 January 1993 by site operations personnel. The blown fuse was replaced, which started the AEM working; but AEM home signal values between 30 Dec and 04 Jan were around zero. Home values remained around zero until at least January 8, 1993. I have a gap in data archived at ANL between 8 and 15 January 1993, during which I do not know quite what was happening. On 11 January 1993 site operations personnel found that the EBBR1 battery was run down and the EBBR thus was not working. A new battery was installed. On 15 January the home values were about 34. I am assuming that they became 34 upon installation of the new battery on 11 January. Until at least 15 January the home signals stayed around 34. After that period the home signals became greater than 35 and generally were around 36. Only occasionally (a few hours here and there)were the home signals just above or below 35 to produce the proper flux outputs. On 23 April 1993, at my direction (and after a week of tests on other parts of the system), the CR10 data logger was replaced. This solved the problem. In fact, previous to this I had suggested reloading the software into the previous CR10, but the CR10 would not accept it; as soon as the machine was deactivated before that procedure it stopped working altogether. I find it amazing that it worked at all, although all data other than the home signals, and the calculated quantities dependent on them looked perfectly acceptable during the period of interest; there is no evidence that the CR10 was malfunctioning in other areas. The road to restoring the 30 Dec to 23 April data would be a rocky one, as each 15 minute data period would have to be examined to determine the proper position of the sensors on the AEM. However, it is possible to reconstruct most of the 30 minute calculated values from the 15 minute data. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1993-07-13 | 12:00:00 | 1993-11-02 | 21:21:00 | Suspect |
Subject: | SGP/EBBR/E13 - solid moisture correction |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2001-04-01 | 00:00:00 | 2003-06-18 | 23:59:00 | Note |
Subject: | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header |
---|---|
Affected Datastreams: | sgp30ebbrE9.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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-26 | 13:00:00 | 2000-03-26 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2005-10-01 | 20:30:00 | 2005-10-12 | 21:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Fluxes Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The AEM has not been reaching the home_30 position fully a few times a day on most days, resulting in zero home_30 measurements. The sensible and latent heat fluxes are incorrect when the home_30 measurement is near zero. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-12-31 | 23:00:00 | 2000-12-31 | 23:31:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions. Incorrect Bowen ratio, and latent and sensible heat fluxes resulted. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-02-24 | 22:30:00 | 2000-02-24 | 22:31:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR Heat Capacities Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The soil heat capacities were incorrect, a result of the missing data from the previous half hour. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-03-22 | 13:00:00 | 2000-03-22 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Battery voltage was too low. All data was incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-01-25 | 20:10:00 | 2002-01-25 | 21:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Data Incorrect During 6 Month Checks |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The measurements were incorrect during the 6 month checks. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2004-09-08 | 12:00:00 | 2004-09-15 | 19:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - AEM Failure, Fluxes Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The AEM failed. Sensible and latent heat fluxes were incorrect, as well as gradient measurements. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-12-22 | 20:30:00 | 1995-12-22 | 21:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Thermocouple out of range, data incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The left thermocouple temperature for 22 December was out of range between 2030 and 2130 GMT, yielding incorrect values as listed below: 5 minute: tair_top, tair_bot 15 minute: tair_l 30 minute: tair_top, tair_bot, bowen, h, e |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1996-11-18 | 19:42:00 | 1996-11-18 | 20:22:00 | Incorrect |
Subject: | SGP/EBBR/E13 - EBBR 3 Month Checks - 10 EFs |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2017-06-11 | 21:30:00 | 2017-06-13 | 19:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | An AEM failure caused sensible and latent heat fluxes to be incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2003-04-23 | 18:30:00 | 2003-05-01 | 20:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Water In Net Radiometer; Surface Fluxes are Incorrect |
---|---|
Affected Datastreams: | sgp5ebbrE13.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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2014-02-20 | 19:00:00 | 2014-03-19 | 16:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes, and Net Radiation Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The net radiometer was tilted slightly to the west. Correct net radiation was approximately one hour delayed from the correct time. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-11-06 | 00:00:00 | 1995-11-06 | 15:30:00 | Incorrect |
1995-11-05 | 03:30:00 | 1995-11-05 | 14:30:00 | Incorrect |
1995-11-07 | 00:00:00 | 1995-11-07 | 14:00:00 | Incorrect |
1995-11-04 | 12:00:00 | 1995-11-04 | 14:00:00 | Incorrect |
1995-11-08 | 00:00:00 | 1995-11-08 | 14:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Battery voltage drop |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2006-04-23 | 23:00:00 | 2006-04-23 | 23:00:00 | Incorrect |
2006-06-03 | 19:00:00 | 2006-06-04 | 23:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Left Air Temperature Incorrect - Fluxes Affected |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
Description | The left air temperature was incorrect, thus the Bowen ratio and sensible and latent heat fluxes were incorrect also. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2013-05-28 | 08:00:00 | 2013-06-19 | 16:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Incorrect sensible and latent heat fluxes |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | AEM Home Signal was less than the valid min, resulting in incorrect latent and sensible heat fluxes. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1994-11-04 | 20:05:00 | 1994-11-04 | 21:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - T/RH Check |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
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: 2005, 2010, 2015, 2020, 2025, 2030, 2035, 2040, 2045, 2050, 2055, 2100, 2105 15 minute: 2015, 2045, 2100, 2115 30 minute: 2030, 2100 (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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-07-17 | 22:00:00 | 1995-07-24 | 23:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - failure of sensors |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | A lightning strike to the central cluster area shortly after 0800 GMT on July 17 caused failure of several EBBR sensors: both humidity probes, the barometer, soil heat flux #3, soil moisture # 1 and the wind direction. These failed sensors caused sensible, latent, and average soil heat flux to be incorrect until site operations performed maintenance on July 24th. Site Operations found a loose connection from soil moisture probe #1, removed barometer SN 6578 and replaced it with SN 6507, removed soil heat flux sensor #3 with SN 923022 and replaced it with SN 933199, repositioned the wind direction sensor - which was rotated approximately ninety degrees clockwise from its proper position, and removed the right humidity probe SN 460412 and replaced it with SN 460428. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2016-07-02 | 10:30:00 | 2016-07-12 | 14:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Sensible and latent fluxes were incorrect when soil heat flow 3 was incorrect. Soil heat flow probe 3 was damaged, apparently by rodents. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2002-01-08 | 17:30:00 | 2002-01-08 | 18:01:00 | Suspect |
2002-01-09 | 03:30:00 | 2002-01-18 | 00:01:00 | Suspect |
2002-01-07 | 23:30:00 | 2002-01-07 | 23:31:00 | Suspect |
2001-10-12 | 17:35:00 | 2001-10-18 | 16:01:00 | Suspect |
2002-01-05 | 19:30:00 | 2002-01-05 | 19:31:00 | Suspect |
2002-01-06 | 19:30:00 | 2002-01-06 | 21:01:00 | Suspect |
2001-11-22 | 01:30:00 | 2001-11-25 | 15:31:00 | Suspect |
Subject: | SGP EBBR E13 - E13 EBBR Left T/RH Probe Temperature Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The left T/RH Probe Temperature was often incorrect, causing the other indicated measurements to be incorrect also. When the home30 signal had an offset, the top RH probe temperature was incorrect but not the bottom RH probe temperature. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1994-12-18 | 16:30:00 | 1994-12-18 | 19:30:00 | Incorrect |
1994-12-13 | 18:00:00 | 1994-12-13 | 18:30:00 | Incorrect |
1994-12-19 | 00:00:00 | 1994-12-19 | 16:00:00 | Incorrect |
1994-12-25 | 17:00:00 | 1994-12-26 | 18:00:00 | Incorrect |
1994-12-25 | 15:00:00 | 1994-12-25 | 16:00:00 | Incorrect |
1994-12-13 | 04:30:00 | 1994-12-13 | 05:00:00 | Incorrect |
1994-12-25 | 02:00:00 | 1994-12-25 | 14:00:00 | Incorrect |
1994-12-18 | 09:00:00 | 1994-12-18 | 10:30:00 | Incorrect |
1994-12-24 | 08:00:00 | 1994-12-25 | 01:00:00 | Incorrect |
1994-12-30 | 17:30:00 | 1994-12-30 | 18:00:00 | Incorrect |
1994-12-23 | 08:30:00 | 1994-12-23 | 20:30:00 | Incorrect |
1994-12-27 | 02:00:00 | 1994-12-27 | 17:00:00 | Incorrect |
1994-12-20 | 02:00:00 | 1994-12-20 | 04:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Incorrect Soil Temperature #4 |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | For periods of a number of days in December 1994, soil temperature probe #4 indicated incorrect values that were either too high or too low. Site Operations personnel replaced the sensor on December 30, 1994. The times and incorrect data fields are listed below. Only half hour times are listed. The incorrect data on December 30 was the result of the process of replacing the sensor during that time. Data Fields: 15 minute: rr_ts4 30 minute: ts4, ces4, g4, ave_shf, e, h Dates and Times (GMT): 12/13/94 0500, 1830 12/18/94 0900-1030, 1630-1930 12/19/94 0000-1600 12/20/94 0200-0400 12/23/94 0830-2030 12/24/94 0800-2330 12/25/94 0000-0100, 0200-1400, 1530, 1600, 1700-2330 12/26/94 0000-1800 12/27/94 0200-1700 12/30/94 1730-1800 Recomputation of the change in energy storage in the soil could be done roughly from the soil temperature sensors that were still working (roughly because the difference in soil temperature with time is determined with real-time (one minute samples) data, not from the 15 or 30 minute data). However, this would require considerable effort. The process for doing so is therefore not stated here. Contact the mentor for more information if neccesary. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2008-02-29 | 16:30:00 | 2010-03-04 | 16:00:00 | Note |
Subject: | SGP/EBBR/E13 - Reprocessed and Corrected: Incorrect data logger program |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | DATA REPROCESSED and CORRECTED: The soil moisture data for the time period 20080229 - 20100304 was incorrect. It's likely that the proper procedure was not followed during a preventative maintenance visit and an older or an incorrect EF data logger program was installed, greatly reducing the soil moisture values. The data was corrected by the equation y = 1.125x + 6.213 and was archived February 2017. Please retrieve the reprocessed data for use in your analysis. You may find these data using the ARM Discovery tool at the following link: http://www.archive.arm.gov/discovery/#v/results/s/finst::ebbr/fsite::sgp/ffac::sgp.E13 ORIGINAL DQR CATEGORY: Red( Incorrect) REPROCESSED and CORRECTED DATA ARCHIVED:2017-02 REPROCESS IDENTIFICATION NUMBER: RID 1301 --------------------------------------------------- --- ORIGINAL DQR DESCRIPTION --- --------------------------------------------------- The soil moisture data is incorrect. It's likely that the proper procedure was not followed during a preventative maintenance visit and an older or an incorrect EF data logger program was installed, greatly reducing the soil moisture values. --------------------------------------------------- --- ORIGINAL DQR SUGGESTIONS --- --------------------------------------------------- Until data is reprocessed correct the data with the equation below, where x is the present value and y is the corrected value. y = 1.125x + 6.213 |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2000-02-29 | 13:00:00 | 2000-02-29 | 13:01:00 | Incorrect |
Subject: | SGP/EBBR/E13 - E13 EBBR All Data Incorrect |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | Battery voltage was too low. All data were incorrect. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-08-21 | 06:00:00 | 1995-08-21 | 15:00:00 | Incorrect |
1995-08-19 | 11:00:00 | 1995-08-19 | 15:00:00 | Incorrect |
1995-08-18 | 12:30:00 | 1995-08-18 | 15:00:00 | Incorrect |
1995-08-16 | 06:00:00 | 1995-08-16 | 15:30:00 | Incorrect |
1995-08-20 | 09:00:00 | 1995-08-20 | 15:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Battery Voltage Drop |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
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 |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2005-06-08 | 19:00:00 | 2005-07-06 | 16:30:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect (AEM failure) |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The AEM was stuck in the home 30 position most of this period. Therefore, the sensible and latent heat fluxes are incorrect during most of this period. |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1993-12-01 | 12:00:00 | 2003-06-18 | 11:59:00 | Note |
Subject: | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header |
---|---|
Affected Datastreams: | sgp30ebbrE13.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. (NOTE: The actual begin date of some of these data streams is as early as 7/4/93. This DQR applies to all 30m EBBR data.) |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
2010-07-21 | 13:30:00 | 2010-10-01 | 20:00:00 | Incorrect |
Subject: | SGP/EBBR/E13 - Net Radiation Too Large |
---|---|
Affected Datastreams: | sgp30ebbrE13.b1 |
Description | The EBBR Net Radiation (Rn) values maintained a ~200 Wm^-2 reading because of poor cable lead connections. Sensible and latent heat fluxes were therefore overestimated. Sensible (H) and latent heat (LE) fluxes can be estimated in the following way: H (new) = H/[1 + (EBBR Rn - SIRS net radiation)/SIRS net radiation] LE (new) = LE/[1 + (EBBR Rn - SIRS net radiation)/SIRS net radiation] |
Measurements |
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
1995-10-06 | 00:00:00 | 1995-10-06 | 23:59:00 | Suspect |
Subject: | SGP/EBBR/E13 - 3-month Check |
---|---|
Affected Datastreams: | sgp5ebbrE13.b1 |
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. Time of the check is not known, so the entire day has been flagged as suspect. |
Measurements |
|