DQR ID | Subject | Data Streams Affected |
---|---|---|
D041004.4 | SGP/EBBR/E15 - Soil Moisture Coefficients Incorrect | sgp30ebbrE15.b1 |
D041222.13 | SGP/EBBR/E15 - 6 Month Checks | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
D050206.11 | SGP/EBBR/E15 - Wind Speed Frozen Stopped By Ice Storm | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
D050207.7 | SGP/EBBR/E15 - Wind Direction Frozen Stopped By Ice Storm | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
D050215.18 | SGP/EBBR/E15 - Wind Speed Frozen Stopped By Ice | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
D050215.19 | SGP/EBBR/E15 - Wind Direction Frozen Stopped By Ice | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
D050324.1 | SGP/EBBR/E15 - Soil Heat Flows Undermeasured, and Latent and Sensible Heat Fluxes Overstimated | sgp30ebbrE15.b1 |
D050624.2 | SGP/EBBR/E15 - Net Radiation Too Large - Water in Bottom | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
D050719.10 | SGP/EBBR/E15 - Improved EBBR CR10 Program | sgp30ebbrE15.b1 |
D051106.25 | SGP/EBBR/E15 - Average Soil Heat Flux Incorrect | sgp30ebbrE15.b1 |
D051106.9 | SGP/EBBR/E15 - Soil Set #5 Temperature, Moisture, and Heat Flow Incorrect | sgp15ebbrE15.b1, sgp30ebbrE15.b1 |
D051111.12 | SGP/EBBR/E15 - metadata corrections | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
D051215.3 | SGP/EBBR/E15 - Net Radiation, Sensible and Latent Heat Fluxes Incorrect. | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
D060111.10 | SGP/EBBR/E15 - Incorrect Sensible and Latent Heat Fluxes | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
D060111.11 | SGP/EBBR/E15 - Reprocess: Sensible and Latent Heat Fluxes, Soil Set #2 Sometimes Incorrect | sgp30ebbrE15.b1 |
D060501.15 | SGP/EBBR/E15 - Wind Speed Sensor Frozen Stopped | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/11/2001 | 1500 | 09/28/2004 | 1509 |
Subject: | SGP/EBBR/E15 - Soil Moisture Coefficients Incorrect |
DataStreams: | sgp30ebbrE15.b1 |
Description: | The soil Moisture coefficients used for E15 were incorrect from the time of installation of the system in program version 8. On 9 July 02 parameter 4 (an offset value) of program step 136 was changed from 9.5264 to the correct value 0.95264 (this error had been made by the vendor). The error masked the real problem (wrong soil type) and after 9 July 02 resulted in very low soil moisture measurements. The coefficients used were for coarse sand. On 28 Sep 04 I visited the E15 site and found the soil type a fine sandy clay or fine sandy loam. I changed the coefficients at 1509 GMT to those for a very fine sandy loam; this produced reasonable soil moistures for the soil type. The old coefficients in parameters 4 through 9 for step 136 of the program were: 0.95264, -6.7859, 36.224, -58.619, 25.073, 4.2278 The new coefficients are: 10.241, -27.943, 49.523, -12.648, -52.643, 38.054 |
Measurements: | sgp30ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/26/2004 | 1630 | 10/26/2004 | 1700 |
Subject: | SGP/EBBR/E15 - 6 Month Checks |
DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/04/2005 | 1010 | 01/05/2005 | 0200 |
Subject: | SGP/EBBR/E15 - Wind Speed Frozen Stopped By Ice Storm |
DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.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: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/04/2005 | 1605 | 01/05/2005 | 0200 |
Subject: | SGP/EBBR/E15 - Wind Direction Frozen Stopped By Ice Storm |
DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.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: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/12/2005 | 0030 | 01/12/2005 | 1545 |
Subject: | SGP/EBBR/E15 - Wind Speed Frozen Stopped By Ice |
DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.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: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/12/2005 | 0030 | 01/12/2005 | 0930 |
Subject: | SGP/EBBR/E15 - Wind Direction Frozen Stopped By Ice |
DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.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: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/08/2004 | 1830 | 03/01/2005 | 1630 |
Subject: | SGP/EBBR/E15 - Soil Heat Flows Undermeasured, and Latent and Sensible Heat Fluxes |
DataStreams: | sgp30ebbrE15.b1 |
Description: | Use of the wrong soil type soil moisture coefficients caused soil moisture to be greatly undermeasured (a typical wrong value was 4% instead of the correct 17%), soil heat flows to be undermeasured, and sensible and latent heat fluxes to be overestimated. Soil heat flow plate outputs were undermeasured by up to 10%, change of energy storage was undermeasured by up to 80% and total soil heat flow was undermeasured by up to 50% as a result. This would result in approximately a 5% overestimation of both sensible and latent heat fluxes. |
Measurements: | sgp30ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/13/2005 | 0800 | 05/24/2005 | 1700 |
Subject: | SGP/EBBR/E15 - Net Radiation Too Large - Water in Bottom |
DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
Description: | Water in the bottom dome of the net radiometer made the measurements incorrectly large. Sensible and latent heat fluxes were therefore incorrect. |
Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 03/29/2005 | 1900 |
Subject: | SGP/EBBR/E15 - Improved EBBR CR10 Program |
DataStreams: | sgp30ebbrE15.b1 |
Description: | Effective 20050329.1900, the EBBR.E15 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 20050329, 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 sgp30ebbrE15.b1 data stream. The earlier version of the CR10 program was also used on previous EBBR datastream names (e.g. sgp30ebbrE15.a1). |
Measurements: | sgp30ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/01/2005 | 1800 | 03/29/2005 | 1900 |
Subject: | SGP/EBBR/E15 - Average Soil Heat Flux Incorrect |
DataStreams: | sgp30ebbrE15.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: | sgp30ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/15/2005 | 2130 | 07/19/2005 | 1700 |
Subject: | SGP/EBBR/E15 - Soil Set #5 Temperature, Moisture, and Heat Flow Incorrect |
DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1 |
Description: | Rodents chewed the cables on all three soil set #5 sensors, making the measurements incorrect. |
Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2003 | 0000 | 07/22/2005 | 2359 |
Subject: | SGP/EBBR/E15 - metadata corrections |
DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
Description: | On 20050723, a series of metadata corrections and additions were completed. These metadata changes apply to all EBBR.E15 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 the systems 3) Correction of soil type 4) Correction of soil moisture units (from "by volume" to "gravimetric") |
Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/30/2005 | 0000 | 11/08/2005 | 1815 |
Subject: | SGP/EBBR/E15 - Net Radiation, Sensible and Latent Heat Fluxes Incorrect. |
DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
Description: | The top dome of the net radiometer was broken, resulting in net radiations that were too small, and thus sensible and latent heat fluxes that were too small. |
Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/10/2006 | 1330 | 01/17/2006 | 1730 |
Subject: | SGP/EBBR/E15 - Incorrect Sensible and Latent Heat Fluxes |
DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
Description: | Incorrect gradient measurements and sensible and latent heat fluxes resulted from the AEM not exchanging. |
Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/27/2005 | 0000 | 12/18/2005 | 1200 |
Subject: | SGP/EBBR/E15 - Reprocess: Sensible and Latent Heat Fluxes, Soil Set #2 Sometimes Incorrect |
DataStreams: | sgp30ebbrE15.b1 |
Description: | Spikes in soil set #2 sometimes caused sensible and latent heat fluxes to be incorrect. There is no electronic connection between the soil set #2 sensors, so it is suspected that there was a problem in the soil set #2 cable bundle. A power outage ensued, after which the soil set #2 problem did not re-occur. |
Measurements: | sgp30ebbrE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/22/2006 | 1300 | 02/22/2006 | 1530 |
Subject: | SGP/EBBR/E15 - Wind Speed Sensor Frozen Stopped |
DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
Description: | Freezing rain froze the wind speed sensor to a stopped condition during the period. |
Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|