DQR ID | Subject | Data Streams Affected |
---|---|---|
D031103.1 | SGP/EBBR/E26 - AEM Home Signals Incorrect, Surface Fluxes Incorrect | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
D031204.21 | SGP/EBBR/E26 - 6 Month Checks | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
D031211.3 | SGP/EBBR/E26 - Spark Gap Bad, Pressure Incorrect | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
D031222.24 | SGP/EBBR/E26 - Wind Speed Sensor Frozen By Ice Storm | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
D031222.25 | SGP/EBBR/E26 - Wind Direction Sensor Frozen By Ice Storm | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
D040304.28 | SGP/EBBR/E26 - Wind Speed Frozen Stopped By Ice | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
D040304.29 | SGP/EBBR/E26 - Wind Direction Frozen Stopped By Ice | sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
D041222.18 | SGP/EBBR/E26 - 6 Month Checks | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
D041222.4 | SGP/EBBR/E26 - Low Battery Voltage - Many Measurements Incorrect | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
D041222.5 | SGP/EBBR/E26 - Most Measurements Incorrect | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
D050211.1 | SGP/EBBR/E26 - Aging Pressure Sensor Output Changes With Supply Voltage | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
D051112.9 | SGP/EBBR/E26 - metadata corrections | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/30/2003 | 1545 | 11/13/2003 | 1545 |
Subject: | SGP/EBBR/E26 - AEM Home Signals Incorrect, Surface Fluxes Incorrect |
DataStreams: | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
Description: | During a preventative maintenance visit to perform the 6-month calibrations, the home15 and home30 outputs began reading the same as one another. A fuse replacement and lubrication of the AEM sprockets on 11/13 corrected the problem. During the interval specified, the home15, home30, and sensible and latent heat fluxes are incorrect. |
Measurements: | sgp15ebbrE26.b1:
sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/30/2003 | 1535 | 10/30/2003 | 1615 |
Subject: | SGP/EBBR/E26 - 6 Month Checks |
DataStreams: | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp15ebbrE26.b1:
sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2003 | 0000 | 09/29/2004 | 1845 |
Subject: | SGP/EBBR/E26 - Spark Gap Bad, Pressure Incorrect |
DataStreams: | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
Description: | In a trip to E26, I found that a bad spark gap through which the barometer was powered was causing pressure measurements to be incorrect. The pressure readings oscillated with the voltage of the EBBR battery. During daytime the voltage and thus the pressure would increase and vice versa during dark hours. Apparently only the positive side of the power supply was properly connected through the spark gap and thus the voltage received by the pressure sensor was lower than required to power it properly. Under this condition the perssure measurement varies with voltage level. The pressure measurements therefore had a diurnal signature and usually were incorrect. The decreased pressure during most times would cause latent heat flux to be slightly overestimated and sensible heat flux to be slightly underestimated. |
Measurements: | sgp15ebbrE26.b1:
sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/12/2003 | 1935 | 12/14/2003 | 1615 |
Subject: | SGP/EBBR/E26 - Wind Speed Sensor Frozen By Ice Storm |
DataStreams: | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.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: | sgp15ebbrE26.b1:
sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/12/2003 | 2140 | 12/14/2003 | 1530 |
Subject: | SGP/EBBR/E26 - Wind Direction Sensor Frozen By Ice Storm |
DataStreams: | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.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: | sgp15ebbrE26.b1:
sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/02/2004 | 0200 | 02/02/2004 | 1620 |
Subject: | SGP/EBBR/E26 - Wind Speed Frozen Stopped By Ice |
DataStreams: | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.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: | sgp15ebbrE26.b1:
sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/02/2004 | 0410 | 02/02/2004 | 1530 |
Subject: | SGP/EBBR/E26 - Wind Direction Frozen Stopped By Ice |
DataStreams: | sgp30ebbrE26.b1, sgp5ebbrE26.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: | sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/30/2004 | 1530 | 09/30/2004 | 1600 |
Subject: | SGP/EBBR/E26 - 6 Month Checks |
DataStreams: | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp15ebbrE26.b1:
sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/27/2004 | 1930 | 11/05/2004 | 0100 |
11/10/2004 | 0600 | 11/24/2004 | 1500 |
Subject: | SGP/EBBR/E26 - Low Battery Voltage - Many Measurements Incorrect |
DataStreams: | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
Description: | During low battery voltage conditions (< 10.5 V especially) many measurements are incorrect. |
Measurements: | sgp15ebbrE26.b1:
sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/29/2004 | 1100 | 10/29/2004 | 1600 |
Subject: | SGP/EBBR/E26 - Most Measurements Incorrect |
DataStreams: | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
Description: | Most of the measurements became either too large or too small. The cause is not known. |
Measurements: | sgp15ebbrE26.b1:
sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/10/2004 | 1400 | 02/17/2005 | 1630 |
Subject: | SGP/EBBR/E26 - Aging Pressure Sensor Output Changes With Supply Voltage |
DataStreams: | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
Description: | The E26 EBBR pressure sensor experienced the poor internal voltage regulation problem experienced at other sites last year. Aging of the internal voltage regulator caused the pressure output to drop by 1-2 kPa (0.1-0.5 kPa is normal) when the Sun rose and the solar panel goosed the battery voltage up. The sensible and latent heat fluxes were not significantly affected. |
Measurements: | sgp15ebbrE26.b1:
sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2003 | 0000 | 07/22/2005 | 2359 |
Subject: | SGP/EBBR/E26 - metadata corrections |
DataStreams: | sgp15ebbrE26.b1, sgp30ebbrE26.b1, sgp5ebbrE26.b1 |
Description: | On 20050723, a series of metadata corrections and additions were completed. These metadata changes apply to all EBBR.E26 data collected by ARM back to the installation of the instrument in June 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 moisture units (from "by volume" to "gravimetric") |
Measurements: | sgp15ebbrE26.b1:
sgp5ebbrE26.b1:
sgp30ebbrE26.b1:
|