| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D071113.3 | NSA/AERI/C1 - Reprocessed: Failed temp sensor affected calibration | nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1 |
| D080322.1 | NSA/AERI/C1 - Reprocessed: Failed temp sensor affected calibration | nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.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:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/17/2007 | 0000 | 02/13/2008 | 2330 |
| Subject: | NSA/AERI/C1 - Reprocessed: Failed temp sensor affected calibration |
| DataStreams: | nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1 |
| Description: | The blackbody support structure temperature sensor on the NSA.C1 AERI were biased high by approximately 25K beginning 20071217 and became progressively worse until the sensor was replaced 20080213. The temperature from this sensor is used to calibrate the radiance data for the AERI. The AERI data have been reprocessed by replacing the data from the failed sensor with the cold blackbody temperature sensor data and producing corrected/recalibrated radiance data. The reprocessed data were archived in March 2008. |
| Measurements: | nsaaerich2C1.b1:
nsaaerisummaryC1.b1:
nsaaerich1C1.b1:
|