DQR ID | Subject | Data Streams Affected |
---|---|---|
D061020.2 | NSA/AERI/C1 - Reprocessed: Failed temp sensor affected calibration | nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1 |
D070511.1 | NSA/AERI/C1 - Snow in enclosure | nsaaeriC1.00, nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1 |
D071113.3 | NSA/AERI/C1 - Reprocessed: Failed temp sensor affected calibration | nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/18/2006 | 0000 | 11/22/2006 | 2359 |
Subject: | NSA/AERI/C1 - Reprocessed: Failed temp sensor affected calibration |
DataStreams: | nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1 |
Description: | On 18 Oct 2006, a thermistor that measures the temperature of the blackbody support structure failed, resulting in erroneously high values. This measurement, which is captured by the field "BBsupportStructureTemp", provides the temperature of the radiance that is reflected into the blackbody (i.e., captured by the field "calibrationAmbientTemp"), and thus the calibrated radiance (the field "mean_rad") was incorrect and outside the ARM specification that the AERI data should be absolutely calibrated to within 1% of the ambient radiance. The broken thermistor was fixed on 22 Nov 2006. Fortunately, since the emissivity of the blackbodies is so high, absolute accuracy of the calibrationAmbientTemp is not required but should be within a few degrees. The radiance data have been recalibrated using the ambient blackbody temperature (the field "calibrationCBBtemp") as a surrogate of the calibrationAmbientTemp. Historically, the calibrationAmbientTemp and calibrationCBBtemp measurements have been within 1-2 deg. As a result of this recalibration, the radiance data are now absolutely calibrated to better than 1%. |
Measurements: | nsaaerich2C1.b1:
nsaaerisummaryC1.b1:
nsaaerich1C1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/17/2007 | 1800 | 04/18/2007 | 2359 |
Subject: | NSA/AERI/C1 - Snow in enclosure |
DataStreams: | nsaaeriC1.00, nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1 |
Description: | A heavy, wet snowstorm late on April 17th and early on the 18th resulted in wet snow packing around the arms of the AERI's hatch controller. This resulted in the ventilator fan not shutting down when the hatch closed, and thus snow was packed into the front of the AERI (i.e., around the scene mirror and blackbodies). The data for this period should not be used. |
Measurements: | nsaaeriC1.00:
nsaaerich2C1.b1:
nsaaerisummaryC1.b1:
nsaaerich1C1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2007 | 2246 | 11/28/2007 | 1930 |
Subject: | NSA/AERI/C1 - Reprocessed: Failed temp sensor affected calibration |
DataStreams: | nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1 |
Description: | On 11 Nov 2007, a thermistor that measures the temperature of the blackbody support structure failed, resulting in erroneously high values. This measurement, which is captured by the field "BBsupportStructureTemp", provides the temperature of the radiance that is reflected into the blackbody (i.e., captured by the field "calibrationAmbientTemp"), and thus the calibrated radiance (the field "mean_rad") was incorrect and outside the ARM specification that the AERI data should be absolutely calibrated to within 1% of the ambient radiance. The broken thermistor was fixed on 28 Nov 2007. Fortunately, since the emissivity of the blackbodies is so high, absolute accuracy of the calibrationAmbientTemp is not required but should be within a few degrees. The radiance data have been recalibrated using the ambient blackbody temperature (the field "calibrationCBBtemp") as a surrogate of the calibrationAmbientTemp. Historically, the calibrationAmbientTemp and calibrationCBBtemp measurements have been within 1-2 deg. As a result of this recalibration, the radiance data are now absolutely calibrated to better than 1%. The reprocessed data were archived 21 Jan 2008. |
Measurements: | nsaaerich2C1.b1:
nsaaerisummaryC1.b1:
nsaaerich1C1.b1:
|