DQR ID | Subject | Data Streams Affected |
---|---|---|
D000225.4 | SGP/EBBR - EBBR E18 Right Humidity Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D000225.5 | SGP/EBBR - EBBR E18 Data Incorrect After Lightning Strike | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D000225.6 | SGP/EBBR - EBBR E18 Much Data Missing After Lightning Strike | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D000301.4 | SGP/EBBR - EBBR E18 Net Radiation Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D010213.4 | SGP/EBBR/E18 - EBBR E18 Wind Speed Iced | sgp15ebbrE18.b1, sgp5ebbrE18.b1, sgp30ebbrE18.b1 |
D010213.5 | SGP/EBBR/E18 - EBBR E18 Wind Speed Iced | sgp5ebbrE18.b1, sgp30ebbrE18.b1, sgp15ebbrE18.b1 |
D010416.10 | SGP/EBBR/E18 - E18 EBBR Data Incorrect | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
D010416.11 | SGP/EBBR/E18 - E18 EBBR Right RH Incorrect | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
D010416.12 | SGP/EBBR/E18 - E18 EBBR Thum Right Incorrect | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
D010416.8 | SGP/EBBR/E18 - E18 EBBR Data Incorrect | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
D010416.9 | SGP/EBBR/E18 - E18 EBBR Data Incorrect | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
D010427.1 | SGP EBBR E18 - E18 EBBR Wind Direction Frozen | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
D010427.2 | SGP EBBR E18 - E18 EBBR Wind Direction Frozen | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
D010427.3 | SGP EBBR E18 - E18 EBBR Left Ventilator Fan Not Working | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
D011127.29 | SGP EBBR E18 - E18 EBBR Data Incorrect During 6 Month Checks | sgp5ebbrE18.b1, sgp30ebbrE18.b1, sgp15ebbrE18.b1 |
D011218.5 | SGP EBBR E18 - E18 EBBR AEM Frozen, Data Incorrect | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
D011218.6 | SGP EBBR E18 - E18 EBBR Wind Direction Frozen, Data Incorrect | sgp5ebbrE18.b1, sgp15ebbrE18.b1, sgp30ebbrE18.b1 |
D011218.7 | SGP EBBR E18 - E18 EBBR Wind Speed Frozen, Data Incorrect | sgp15ebbrE18.b1, sgp5ebbrE18.b1, sgp30ebbrE18.b1 |
D011218.8 | SGP EBBR E18 - E18 EBBR Right RH Incorrect | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
D020716.14 | SGP/EBBR/E18 - 6 Month Checks | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D020717.20 | SGP/EBBR/E18 - Version 6 Produced Noisy Fluxes | sgp30ebbrE18.b1 |
D020717.21 | SGP/EBBR/E18 - AEM Hung | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D020717.22 | SGP/EBBR/E18 - Soil Heat Flows Incorrect After Calibration Changeout | sgp30ebbrE18.b1 |
D020717.23 | SGP/EBBR/E18 - Reprocess: Soil Heat Flow #1 Incorrect | sgp30ebbrE18.b1 |
D020717.24 | SGP/EBBR/E18 - Left Air Temperature Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D020717.25 | SGP/EBBR/E18 - Reference Temperature Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D021113.1 | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header | sgp30ebbrE12.b1, sgp30ebbrE13.b1, sgp30ebbrE15.b1, sgp30ebbrE18.b1, sgp30ebbrE19.b1, sgp30ebbrE2.b1, sgp30ebbrE20.b1, sgp30ebbrE22.b1, sgp30ebbrE26.b1, sgp30ebbrE4.b1, sgp30ebbrE7.b1, sgp30ebbrE8.b1, sgp30ebbrE9.b1 |
D030110.23 | SGP/EBBR/E18 - Data Incorrect during 6 month checks | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D030115.10 | SGP/EBBR/E18 - Reprocess: Soil Heat Flow #1 High | sgp30ebbrE18.b1 |
D030115.11 | SGP/EBBR/E18 - Reprocess: Soil Heat Flow #4 High | sgp30ebbrE18.b1 |
D030115.12 | SGP/EBBR/E18 - Data Mostly Zero Following Logger Restart | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D030115.13 | SGP/EBBR/E18 - Data Incorrect After Logger Restart | sgp30ebbrE18.b1 |
D030115.14 | SGP/EBBR/E18 - Water in Net Radiometer Dome | sgp30ebbrE18.b1 |
D030117.24 | SGP/EBBR/E18 - REPROCESS: Soil Heat Flow #1 and #4 High | sgp30ebbrE18.b1 |
D030711.22 | SGP/EBBR/E18 - AEM Hung | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D030712.19 | SGP/EBBR/E18 - 6 Month Checks | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D030919.9 | SGP/EBBR/E18 - Water in Net Radiometer; Surface Fluxes are Incorrect | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
D031204.16 | SGP/EBBR/E18 - 6 Month Checks | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D040206.1 | SGP/EBBR/E18 - AEM Sitting At Home 15 Position | sgp30baebbrE18.c1, sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
D040304.17 | SGP/EBBR/E18 - Wind Speed Frozen Stopped By Ice | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D040304.18 | SGP/EBBR/E18 - Wind Direction Frozen Stopped By Ice | sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D040505.3 | SGP/EBBR/E18 - Pressure Low | sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D040723.4 | SGP/EBBR/E18 - Soil Temperature and Moisture Probes in Set #1 Spiked Outputs | sgp30ebbrE18.b1 |
D040813.6 | SGP/EBBR/E18 - Soil Temperature #2 Incorrect | sgp30ebbrE18.b1 |
D041222.14 | SGP/EBBR/E18 - 6 Month Checks | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D050206.12 | SGP/EBBR/E18 - Wind Speed Frozen Stopped By Ice Storm | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D050207.8 | SGP/EBBR/E18 - Wind Direction Frozen Stopped By Ice Storm | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
D050719.11 | SGP/EBBR/E18 - Improved EBBR CR10 Program | sgp30ebbrE18.b1 |
D051106.10 | SGP/EBBR/E18 - Net Radiation Incorrect; Sensible and Latent Heat Fluxes Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D051106.26 | SGP/EBBR/E18 - Average Soil Heat Flux Incorrect | sgp30ebbrE18.b1 |
D051111.13 | SGP/EBBR/E18 - metadata corrections | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D060501.17 | SGP/EBBR/E18 - Wind Speed Zero | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D060818.6 | SGP/EBBR/E18 - Sensible and Latent Heat Fluxes and Net Radiation Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D061103.3 | SGP/EBBR/E18 - Sensible and Latent Heat Fluxes Incorrect | sgp30ebbrE18.b1 |
D061220.10 | SGP/EBBR/E18 - Wind Direction Dependency of Surface Fluxes and General Data Quality Information | sgp30ebbrE18.b1 |
D080424.1 | SGP/EBBR/E18 - Soil Heat Flow #4 Offscale Low; Sensible and Latent Heat Flux Sometimes Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1 |
D080702.2 | SGP/EBBR/E18 - SHF #4 Measurements Too Low; Sensible and Latent Heat Fluxes Suspect | sgp15ebbrE18.b1, sgp30ebbrE18.b1 |
D090313.3 | SGP/EBBR/E18 - Wind Speed Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D971027.6 | SGP/EBBR/E18 - Left RH Probe Temperature Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1 |
D980416.14 | SGP/EBBR/E18 - 3 Month Check | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D980529.12 | SGP/EBBR/E18 - Six Month Checks | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D980623.2 | SGP/EBBR/E18 - Reprocess: E18 EBBR Net Radiometer Calibration | sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D990127.10 | SGP/EBBR/E18 - Water In Net Radiometer, Flux Data Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
D990127.23 | SGP/EBBR/E18 - Wind Direction Data Incorrect (revised) | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp5ebbrE18.00 |
D990127.37 | SGP/EBBR - EBBR E18 Wind Speed Data Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp5ebbrE18.00 |
D990127.38 | SGP/EBBR/E18 - Wind Speed Data Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp5ebbrE18.00 |
D990127.39 | SGP/EBBR/E18 - Wind Speed Data Incorrect | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp5ebbrE18.00 |
D990622.2 | SGP/EBBR/E18 - Pressure Incorrect | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp5ebbrE18.00 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/03/1999 | 0545 | 01/11/2000 | 2135 |
Subject: | SGP/EBBR - EBBR E18 Right Humidity Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | After the 3 December 99 lightning strike, the humidity portion of the right T/RH probe drifted downwards at times, causing vapor pressure gradients to be incorrectly measured. Therefore, sensible and latent heat fluxes were also incorrect. Since much of the data from the period is missing (because of latent effects of the lightning strike), little data is actually affected. The affected data values were: 5 minute: hum_top, hum_bot, vp_top, vp_bot 15 minute: mv_hum_r 30 minute: hum_top, hum_bot, vp_top, vp_bot, bowen, h, e |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/03/1999 | 0535 | 12/03/1999 | 0600 |
Subject: | SGP/EBBR - EBBR E18 Data Incorrect After Lightning Strike |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | Immediately after the 3 December 99 lightning strike, all data from this EBBR system was incorrect. The system crashed at the end of this period. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/03/1999 | 0535 | 02/14/2000 | 0915 |
Subject: | SGP/EBBR - EBBR E18 Much Data Missing After Lightning Strike |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | On 3 December 99 this EBBR system was struck by lightning. Much of the data from this EBBR system for the stated period is missing. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/21/1999 | 1330 | 09/22/1999 | 0300 |
Subject: | SGP/EBBR - EBBR E18 Net Radiation Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.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: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/11/2000 | 0930 | 12/15/2000 | 0245 |
Subject: | SGP/EBBR/E18 - EBBR E18 Wind Speed Iced |
DataStreams: | sgp15ebbrE18.b1, sgp5ebbrE18.b1, sgp30ebbrE18.b1 |
Description: | The anemometer was frozen stopped by freezing rain. Indicated data is incorrect. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/25/2000 | 2015 | 01/03/2001 | 1915 |
Subject: | SGP/EBBR/E18 - EBBR E18 Wind Speed Iced |
DataStreams: | sgp5ebbrE18.b1, sgp30ebbrE18.b1, sgp15ebbrE18.b1 |
Description: | The anemometer was frozen stopped by freezing rain. Indicated data is incorrect. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/19/2000 | 2115 | 09/19/2000 | 2131 |
Subject: | SGP/EBBR/E18 - E18 EBBR Data Incorrect |
DataStreams: | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The EBBR data was incorrect during maintenance. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2000 | 0000 | 04/04/2000 | 2131 |
Subject: | SGP/EBBR/E18 - E18 EBBR Right RH Incorrect |
DataStreams: | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
Description: | Right RH being incorrect caused a number of calculated measurements to be incorrect also, including Bowen ratio, and latent and sensible heat fluxes. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/21/2000 | 2300 | 04/04/2000 | 2131 |
Subject: | SGP/EBBR/E18 - E18 EBBR Thum Right Incorrect |
DataStreams: | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The temperature portion of the right T/RH probe was not working. Calculated vapor pressure, Bowen ratio, and sensible and latent heat fluxes were also incorrect. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/18/2000 | 2100 | 04/18/2000 | 2101 |
Subject: | SGP/EBBR/E18 - E18 EBBR Data Incorrect |
DataStreams: | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The EBBR data was incorrect while the datalogger was being upgraded/replaced. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/28/2000 | 1730 | 07/28/2000 | 1731 |
Subject: | SGP/EBBR/E18 - E18 EBBR Data Incorrect |
DataStreams: | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The EBBR data was incorrect just after power was restored. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/11/2000 | 1000 | 12/13/2000 | 1701 |
Subject: | SGP EBBR E18 - E18 EBBR Wind Direction Frozen |
DataStreams: | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The wind direction sensor was frozen stopped. The indicated measurements are incorrect as a result. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/26/2000 | 1330 | 12/29/2000 | 1901 |
Subject: | SGP EBBR E18 - E18 EBBR Wind Direction Frozen |
DataStreams: | sgp30ebbrE18.b1, sgp15ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The wind direction sensor was frozen stopped. The indicated measurements are incorrect as a result. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/12/2000 | 0015 | 09/19/2000 | 2101 |
Subject: | SGP EBBR E18 - E18 EBBR Left Ventilator Fan Not Working |
DataStreams: | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
Description: | The left ventilator fan was not working. Some of the indicated measurements may be incorrect (under some wind speed and direction conditions, cloud cover, and time of day, some of the data may be correct). The data is therefore described as suspect for the indicated period. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/03/2001 | 2255 | 04/03/2001 | 2341 |
10/18/2001 | 1421 | 10/18/2001 | 1601 |
Subject: | SGP EBBR E18 - E18 EBBR Data Incorrect During 6 Month Checks |
DataStreams: | sgp5ebbrE18.b1, sgp30ebbrE18.b1, sgp15ebbrE18.b1 |
Description: | The data was incorrect during the 6 month checks. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/15/2001 | 0800 | 02/16/2001 | 2031 |
Subject: | SGP EBBR E18 - E18 EBBR AEM Frozen, Data Incorrect |
DataStreams: | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
Description: | The AEM was frozen in one position. The indicated data is incorrect. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/15/2001 | 0625 | 02/16/2001 | 2031 |
02/16/2001 | 2355 | 02/17/2001 | 1650 |
Subject: | SGP EBBR E18 - E18 EBBR Wind Direction Frozen, Data Incorrect |
DataStreams: | sgp5ebbrE18.b1, sgp15ebbrE18.b1, sgp30ebbrE18.b1 |
Description: | The wind direction sensor was frozen stopped. The indicated data is incorrect. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/15/2001 | 0620 | 02/17/2001 | 2006 |
Subject: | SGP EBBR E18 - E18 EBBR Wind Speed Frozen, Data Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp5ebbrE18.b1, sgp30ebbrE18.b1 |
Description: | The wind speed sensor was frozen stopped. The indicated data are incorrect. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/10/2001 | 1810 | 06/12/2001 | 2240 |
Subject: | SGP EBBR E18 - E18 EBBR Right RH Incorrect |
DataStreams: | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
Description: | The RH portion of the T/RH probe produced incorrect data. Sensible and latent heat fluxes and the Bowen ratio were also incorrect. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/30/2002 | 2000 | 04/30/2002 | 2031 |
Subject: | SGP/EBBR/E18 - 6 Month Checks |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The indicated measurements were incorrect during the 6 month checks. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2001 | 0000 | 03/29/2002 | 1631 |
Subject: | SGP/EBBR/E18 - Version 6 Produced Noisy Fluxes |
DataStreams: | sgp30ebbrE18.b1 |
Description: | Version 6 of the CR10 program produced noisy latent and sensible heat fluxes. That ended on March 29 after a recalibration unit was installed with version 8. |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/2002 | 0030 | 04/17/2002 | 1401 |
05/01/2002 | 0300 | 05/28/2002 | 2031 |
11/14/2001 | 1945 | 11/14/2001 | 2001 |
11/25/2001 | 0215 | 11/25/2001 | 1901 |
11/28/2001 | 1145 | 11/28/2001 | 1501 |
11/29/2001 | 0745 | 11/29/2001 | 0931 |
11/29/2001 | 1415 | 11/30/2001 | 0431 |
12/02/2001 | 0145 | 12/02/2001 | 0201 |
12/03/2001 | 0045 | 12/03/2001 | 0101 |
12/24/2001 | 2015 | 12/24/2001 | 2031 |
12/25/2001 | 1915 | 12/25/2001 | 2031 |
01/18/2002 | 0115 | 01/18/2002 | 0201 |
01/24/2002 | 2115 | 01/24/2002 | 2131 |
01/28/2002 | 1345 | 01/28/2002 | 1401 |
02/13/2002 | 2215 | 02/14/2002 | 0801 |
02/25/2002 | 2345 | 02/26/2002 | 0001 |
03/14/2002 | 1515 | 03/29/2002 | 1831 |
04/18/2002 | 2230 | 04/30/2002 | 2031 |
01/22/2002 | 1615 | 01/22/2002 | 1631 |
Subject: | SGP/EBBR/E18 - AEM Hung |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The automatic exchange mechanism did not work properly for a number of time periods. The Bowen ratio, latent heat flux, and sensible heat flux were incorrect also during this condition. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/29/2002 | 1815 | 03/29/2002 | 2131 |
Subject: | SGP/EBBR/E18 - Soil Heat Flows Incorrect After Calibration Changeout |
DataStreams: | sgp30ebbrE18.b1 |
Description: | The soil heat flows were incorrect while the EBBR changeout was being done. |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/20/2002 | 0600 | 05/20/2002 | 2001 |
05/21/2002 | 0430 | 05/21/2002 | 1731 |
05/22/2002 | 1130 | 05/22/2002 | 1631 |
Subject: | SGP/EBBR/E18 - Reprocess: Soil Heat Flow #1 Incorrect |
DataStreams: | sgp30ebbrE18.b1 |
Description: | Soil Heat Flow 1 was incorrect during the indicated periods. 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: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/09/2002 | 1900 | 05/14/2002 | 1846 |
Subject: | SGP/EBBR/E18 - Left Air Temperature Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The left air temperature was incorrect much of the time, causing the Bowen ratio, sensible heat flux, and latent heat flux to be incorrect also. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/17/2002 | 1430 | 04/17/2002 | 1431 |
Subject: | SGP/EBBR/E18 - Reference Temperature Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The reference temperature was incorrect during the checks of the left air temperature sensor, leading to all gradient measurements, Bowen ratio, sensible heat flux, latent heat flux, soil temperature, and soil moisture measurements being incorrect. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 06/18/2003 | 2359 |
Subject: | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR |
DataStreams: | sgp30ebbrE12.b1, sgp30ebbrE13.b1, sgp30ebbrE15.b1, sgp30ebbrE18.b1, sgp30ebbrE19.b1, sgp30ebbrE2.b1, sgp30ebbrE20.b1, sgp30ebbrE22.b1, sgp30ebbrE26.b1, sgp30ebbrE4.b1, sgp30ebbrE7.b1, sgp30ebbrE8.b1, 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: | sgp30ebbrE2.b1:
sgp30ebbrE26.b1:
sgp30ebbrE9.b1:
sgp30ebbrE22.b1:
sgp30ebbrE13.b1:
sgp30ebbrE7.b1:
sgp30ebbrE18.b1:
sgp30ebbrE12.b1:
sgp30ebbrE4.b1:
sgp30ebbrE15.b1:
sgp30ebbrE19.b1:
sgp30ebbrE20.b1:
sgp30ebbrE8.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/25/2002 | 2215 | 11/25/2002 | 2245 |
Subject: | SGP/EBBR/E18 - Data Incorrect during 6 month checks |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | Some of the measurements are incorrect during the 6 month checks. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/01/2002 | 2100 | 11/12/2002 | 2130 |
07/08/2002 | 1800 | 07/19/2002 | 1430 |
08/20/2002 | 2100 | 08/26/2002 | 0300 |
Subject: | SGP/EBBR/E18 - Reprocess: Soil Heat Flow #1 High |
DataStreams: | sgp30ebbrE18.b1 |
Description: | Soil Heat Flow #1 measurements were 2X to offscale high during these periods. See below for a work-around. |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/20/2002 | 2000 | 07/26/2002 | 2030 |
07/27/2002 | 0300 | 07/30/2002 | 2000 |
08/03/2002 | 0130 | 08/06/2002 | 2030 |
08/07/2002 | 0200 | 08/09/2002 | 1900 |
08/12/2002 | 0130 | 08/17/2002 | 2030 |
08/17/2002 | 2130 | 08/19/2002 | 1830 |
Subject: | SGP/EBBR/E18 - Reprocess: Soil Heat Flow #4 High |
DataStreams: | sgp30ebbrE18.b1 |
Description: | Soil Heat Flow #4 measurements were 2X or offscale high during this period when compared with the other soil heat flow measurements. See below for a work-around. |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/12/2002 | 2200 | 11/12/2002 | 2229 |
Subject: | SGP/EBBR/E18 - Data Mostly Zero Following Logger Restart |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | Most of the measurements were zero, which normally happens after a datalogger restart. The restart on 11/12/02 occurred after replacement of soil heat flow #1. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/12/2002 | 2230 | 11/12/2002 | 2259 |
Subject: | SGP/EBBR/E18 - Data Incorrect After Logger Restart |
DataStreams: | sgp30ebbrE18.b1 |
Description: | Because soil temperature measurements were not available from the beginning of the half hour, the change in soil energy storage could not be calculated and thus is incorrect. There is no fix to this problem. Average Soil Heat Flow, Sensible Heat Flux (h), and Latent Heat Flux (e) can not be calculated using the available, remaining measurements. |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/2002 | 1400 | 10/15/2002 | 2030 |
Subject: | SGP/EBBR/E18 - Water in Net Radiometer Dome |
DataStreams: | sgp30ebbrE18.b1 |
Description: | The net radiation measurement is incorrect. Measurements calculated using net radiation are also incorrect. No work-around is possible for this situation. |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/19/2002 | 1430 | 07/20/2002 | 2000 |
07/26/2002 | 2030 | 07/27/2002 | 0300 |
07/30/2002 | 2000 | 08/03/2002 | 0130 |
08/06/2002 | 2030 | 08/07/2002 | 0200 |
08/09/2002 | 1900 | 08/12/2002 | 0130 |
08/17/2002 | 2030 | 08/17/2002 | 2130 |
08/19/2002 | 1830 | 08/20/2002 | 2100 |
Subject: | SGP/EBBR/E18 - REPROCESS: Soil Heat Flow #1 and #4 High |
DataStreams: | sgp30ebbrE18.b1 |
Description: | Soil Heat Flow #1 and #4 measurements were 2X to offscale high during these periods. See suggestions for a work-around. |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2003 | 2145 | 04/01/2003 | 2200 |
Subject: | SGP/EBBR/E18 - AEM Hung |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The AEM was hung inbetween home positions, causing many measurements to be incorrect. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/15/2003 | 2120 | 04/15/2003 | 2215 |
Subject: | SGP/EBBR/E18 - 6 Month Checks |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/30/2003 | 1500 | 09/02/2003 | 2100 |
Subject: | SGP/EBBR/E18 - Water in Net Radiometer; Surface Fluxes are Incorrect |
DataStreams: | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.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: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/28/2003 | 2225 | 10/28/2003 | 2315 |
Subject: | SGP/EBBR/E18 - 6 Month Checks |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/26/2004 | 1915 | 04/13/2004 | 2045 |
Subject: | SGP/EBBR/E18 - AEM Sitting At Home 15 Position |
DataStreams: | sgp30baebbrE18.c1, sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.b1 |
Description: | After replacement of the AEM on 1/26/04, it exchanged briefly, then sat at the home 15 position until another replacement was available. |
Measurements: | sgp15ebbrE18.b1:
sgp30baebbrE18.c1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/28/2004 | 0140 | 01/28/2004 | 0305 |
02/05/2004 | 0145 | 02/05/2004 | 0520 |
Subject: | SGP/EBBR/E18 - Wind Speed Frozen Stopped By Ice |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.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: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/28/2004 | 0140 | 01/28/2004 | 0305 |
Subject: | SGP/EBBR/E18 - Wind Direction Frozen Stopped By Ice |
DataStreams: | sgp30ebbrE18.b1, sgp5ebbrE18.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: | sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/19/2004 | 0500 | 06/13/2004 | 1700 |
Subject: | SGP/EBBR/E18 - Pressure Low |
DataStreams: | sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | Pressure readings suddenly dropped to unrealistic levels. Sensible Heat Flux was underestimated and Latent Heat Flux was overestimated because of this problem. |
Measurements: | sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/28/2004 | 1300 | 07/28/2004 | 1500 |
Subject: | SGP/EBBR/E18 - Soil Temperature and Moisture Probes in Set #1 Spiked Outputs |
DataStreams: | sgp30ebbrE18.b1 |
Description: | Soil moisture #1 and soil temperature #1 occasionally spiked at the same time. Little sensible and latent heat flux data were affected. |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/06/2004 | 1830 | 07/06/2004 | 2100 |
Subject: | SGP/EBBR/E18 - Soil Temperature #2 Incorrect |
DataStreams: | sgp30ebbrE18.b1 |
Description: | Soil Temperature #2 was incorrect during the indicated period. Average soil heat flow, sensible heat flux, and latent heat flux are incorrect, as a result. |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/28/2004 | 2230 | 09/28/2004 | 2300 |
Subject: | SGP/EBBR/E18 - 6 Month Checks |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2005 | 1810 | 01/06/2005 | 2045 |
Subject: | SGP/EBBR/E18 - Wind Speed Frozen Stopped By Ice Storm |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.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: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/07/2005 | 0010 | 01/07/2005 | 1550 |
Subject: | SGP/EBBR/E18 - Wind Direction Frozen Stopped By Ice Storm |
DataStreams: | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp15ebbrE18.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: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 03/30/2005 | 0000 |
Subject: | SGP/EBBR/E18 - Improved EBBR CR10 Program |
DataStreams: | sgp30ebbrE18.b1 |
Description: | Effective 20050330.0000, the EBBR.E18 CR10 program was revised to improve the quality of the primary measurements as follows: 1) An RMS procedure is used to determine max and min limits of acceptable soil heat flow. This is applied to the individual soil sets. Measurements outside the limits are rejected and the measurements within the limits are used to calculate the average soil heat flow. 2) Max and min limits are used to determine incorrect values of net radiation, sensible heat flux (h), latent heat flux (e), and automatic exchange mechanism (AEM) signal. If AEM signal is outside the limits, h and e are set to 999s. If net radiation is outside the limits, h and e are set to 999s. If h or e are outside the limits, h and e are set to 999s. Virtually no incorrect soil measurement will affect the primary measurements of h and e. By setting h and e to 999s, it can be easily seen that the primary variables are incorrect; no other interpretation is possible. Prior to 20050330, the improved CR10 program was NOT in effect. DQRs have been submitted for known instances of incorrect soil measurements which affected the quality of the primary measurements of h and e. Note: the DQR begin date is the begin date of the sgp30ebbrE18.b1 data stream. The earlier version of the CR10 program was also used on previous EBBR datastream names (e.g. sgp30ebbrE18.a1). |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/27/2005 | 0730 | 08/03/2005 | 2100 |
Subject: | SGP/EBBR/E18 - Net Radiation Incorrect; Sensible and Latent Heat Fluxes Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The net radiometer top dome was broken and water got inside, making the net radiation, and sensible and latent heat flux measurements incorrect. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/01/2005 | 2330 | 03/30/2005 | 0000 |
Subject: | SGP/EBBR/E18 - Average Soil Heat Flux Incorrect |
DataStreams: | sgp30ebbrE18.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: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2003 | 0000 | 07/22/2005 | 2359 |
Subject: | SGP/EBBR/E18 - metadata corrections |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | On 20050723, a series of metadata corrections and additions were completed. These metadata changes apply to all EBBR.E18 data collected by ARM back to the installation of the instrument in July 1997. Please see the current metadata for correct information. These changes do not affect data values or quality. The changes are summarized below: 1) Update of "sensor location" information 2) Addition of installation dates for the systems 3) Correction of soil type 4) Correction of soil moisture units (from "by volume" to "gravimetric") |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/22/2006 | 0000 | 01/26/2006 | 0530 |
02/18/2006 | 0400 | 02/18/2006 | 2030 |
02/20/2006 | 0200 | 02/24/2006 | 1630 |
03/31/2006 | 0530 | 03/31/2006 | 0900 |
Subject: | SGP/EBBR/E18 - Wind Speed Zero |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | Wind Speed was zero, presumably because the sensor was frozen stopped during freezing rain. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/31/2006 | 0430 | 06/02/2006 | 2130 |
Subject: | SGP/EBBR/E18 - Sensible and Latent Heat Fluxes and Net Radiation Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The net radiometer dome was cracked and water had gotten in, resulting in incorrect net radiation measurements and therefore incorrect sensible and latent heat flux measurements. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/30/2006 | 2200 | 11/07/2006 | 2130 |
Subject: | SGP/EBBR/E18 - Sensible and Latent Heat Fluxes Incorrect |
DataStreams: | sgp30ebbrE18.b1 |
Description: | Sensible and latent heat fluxes were incorrect during this period because the AEM was not exchanging. |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/10/1997 | 2000 | 10/12/2003 | 2330 |
Subject: | SGP/EBBR/E18 - Wind Direction Dependency of Surface Fluxes and General Data Quality |
DataStreams: | sgp30ebbrE18.b1 |
Description: | Beginning in FY2006, Data Quality Reports are not written for missing data or for situations when qc flags clearly show that the data is incorrect (this is true for most of the conditions listed below). DQRs are written for periods when data is incorrect, when the situation is not represented by qc flags in the data, and it's not obvious that the data should have been flagged as incorrect. The EBBR data is only useful for particular wind directions at each Extended Facility. Please use the following resources to help in interpreting the EBBR data. 1) qc flags in the EBBR data. 2) Instrument Mentor Monthly Summaries (IMMS) at http://www.db.arm.gov/IMMS/ 3) SGP EF Surface Conditions Observations (EFSCO) at http://198.124.96.210:591/sfc_cond1/default.htm 4) Surface fluxes are valid only for the following wind directions (in degrees): 138-325 Note that there are wind directions at most sites for which the fetch is insufficient and therefore EBBR data is invalid. Appropriate fetch was determined from a 1/40 measurement height to fetch ratio, resulting in a required minimum fetch of 120 m. Particular attention should be paid to the limited valid wind directions for the Central Facility EBBR. The surface vegetation type for the EBBRs is grazed or ungrazed grassland (refer to the EFSCO for state). 5) Some conditions that commonly cause the EBBR primary measurements to be incorrect or missing follow: a) Sensible and latent heat fluxes are not accurate during times when the Automatic Exchange Mechanism (AEM) is not functioning properly. The AEM switches the gradient measuring instrumentation between the top and bottom positions every 15 minutes; this reduces the effects of instrument offsets. Sometimes the AEM does not reach it's full extent of travel, resulting in the home signal being zero. b) Sensible and latent heat fluxes are sometimes incorrect when surface soil heat flow is out of range, as seen in the average soil heat flux (ave_shf). c) Very light winds may be seen at nights for brief periods. Wind direction flops around a lot during low wind conditions (< 1.5 m/s) and is often unreliable during those periods. d) Missing data periods occur at times; this is usually a site data system collection/communication problem; it can also occur during replacement of the system with a newly calibrated unit. Missing data is sometimes filled in later from manual or automatic re-collection of the data. |
Measurements: | sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/15/2008 | 0030 | 05/06/2008 | 2110 |
Subject: | SGP/EBBR/E18 - Soil Heat Flow #4 Offscale Low; Sensible and Latent Heat Flux Sometimes |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1 |
Description: | Soil heat flow #4 was sometimes lower than the lower limit imposed in the EBBR programming; sensible and latent heat flux were therefore deemed to be suspect during those times. The cause of the low values is not clear, but the values are not reasonable for the vegetation type at EF18. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/06/2008 | 1215 | 06/17/2008 | 2120 |
Subject: | SGP/EBBR/E18 - SHF #4 Measurements Too Low; Sensible and Latent Heat Fluxes Suspect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1 |
Description: | Soil heat flow #4 was replaced at the beginning of this period. However, the soil heat flow measurements from that sensor were sometimes still lower than the lower limit imposed in the EBBR programming; sensible and latent heat flux were therefore deemed to be suspect during those times. The cause of the low values could not be determined, but the values are not reasonable for the vegetation type at EF18. To remedy the situation, the soil heat flow sensor calibration was changed so that the sensor provided measurements that resembled the other four soil heat flow sensor measurements. Soil heat flow measurements have been reasonable since the calibration change. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/26/2009 | 2150 | 01/29/2009 | 1550 |
Subject: | SGP/EBBR/E18 - Wind Speed Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | The wind speed sensor was frozen stopped and thus wind speed was incorrect during this period. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/10/1997 | 2000 | 10/23/1997 | 1700 |
Subject: | SGP/EBBR/E18 - Left RH Probe Temperature Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1 |
Description: | The left humidity probe temperature produced incorrect values from the time of installation of the E18 EBBR until 23 October at 1700 GMT because of a poor connection. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/23/1997 | 1355 | 10/23/1997 | 1420 |
Subject: | SGP/EBBR/E18 - 3 Month Check |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.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: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/21/1998 | 1402 | 05/21/1998 | 1430 |
Subject: | SGP/EBBR/E18 - Six Month Checks |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.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 above. |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/10/1997 | 2000 | 06/18/1998 | 1420 |
Subject: | SGP/EBBR/E18 - Reprocess: E18 EBBR Net Radiometer Calibration |
DataStreams: | sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | When the CR10 program was loaded in the storage module of the newly installed EBBR unit at E18 on 10 September 1997, an incorrect calibration for the net radiometer was present. The incorrect calibration had apparently been entered into the storage module by the vendor before the unit was shipped. The .DOC file showed the correct calibration; therefore, we did not suspect a problem until comparisons with radiometers at other sites nearby were performed. The program with the correct calibration was entered on 18 June 1998. The 15 minute mv_q values were not affected. The 5 and 30 minute q values during the period above need to be corrected; multiply positive q values by 0.684, multiply negative values by 0.811; Sensible (h) and Latent Heat (e) fluxes for the period need to be recalculated with the equations below. e = -(q + ave_shf)/(1 + bowen) h = -(e + ave_shf + q) |
Measurements: | sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/15/1998 | 0100 | 11/17/1998 | 2100 |
Subject: | SGP/EBBR/E18 - Water In Net Radiometer, Flux Data Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1 |
Description: | Incorrect Net Radiation values resulted from water in the bottom dome. Thus incorrect sensible and latent heat fluxes resulted. Affected values are: 5 minute: q 15 minute: mv_q 30 minute: q, e, h |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/21/1998 | 1635 | 12/23/1998 | 2000 |
Subject: | SGP/EBBR/E18 - Wind Direction Data Incorrect (revised) |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp5ebbrE18.00 |
Description: | The wind direction sensor was iced stopped by freezing rain, resulting in the following values being incorrect: 5 minute: res_ws, wind_d, sigma_wd 15 minute: mv_wind_d 30 minute: res_ws, wind_d, sigma_wd |
Measurements: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
sgp5ebbrE18.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/21/1998 | 1005 | 12/22/1998 | 2000 |
Subject: | SGP/EBBR - EBBR E18 Wind Speed Data Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp5ebbrE18.00 |
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: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
sgp5ebbrE18.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/02/1999 | 0805 | 01/02/1999 | 1800 |
Subject: | SGP/EBBR/E18 - Wind Speed Data Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp5ebbrE18.00 |
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: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
sgp5ebbrE18.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/08/1999 | 1015 | 01/10/1999 | 1300 |
Subject: | SGP/EBBR/E18 - Wind Speed Data Incorrect |
DataStreams: | sgp15ebbrE18.b1, sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp5ebbrE18.00 |
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: | sgp15ebbrE18.b1:
sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
sgp5ebbrE18.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/08/1997 | 2030 | 06/17/1999 | 1600 |
Subject: | SGP/EBBR/E18 - Pressure Incorrect |
DataStreams: | sgp30ebbrE18.b1, sgp5ebbrE18.b1, sgp5ebbrE18.00 |
Description: | The pressure sensor was replaced at E18 EBBR without the replacement being noted by Site Ops and therefore without an indication of serial number and thus correct calibration. The serial number of the sensor was observed during a PM (after months of confusion concerning the thing) and a several month search for the calibration sheet at ANL, the CF, and the manufacturer ensued. The sheet was finally found and I confirmed that an incorrect offset was being used (the same as used for the previous sensor). This is an easy error to make as there are two models of pressure sensors (with different calibration ranges) being used in the EBBR systems. On June 17, 1999 the correct offset was entered into the CR10 and storage module programming. The pressure for the period should be increased by 6.757 kPa. The result of the error is that Bowen ratio was underestimated by 6.8% on average, Latent Heat Flux was overestimated by 3.6% on average, and Sensible Heat Flux was underestimated by 3.6% on average. The errors in the fluxes are smaller than the estimated 10% error in the Bowen ratio flux measurement technique and therefore the data does not need to be reprocessed. Anyone performing area averages of pressure or looking at the variation in pressure over the CART Site should adjust the E18 EBBR pressure values for this period using the offset error indicated above. |
Measurements: | sgp30ebbrE18.b1:
sgp5ebbrE18.b1:
sgp5ebbrE18.00:
|