DQR ID | Subject | Data Streams Affected |
---|---|---|
D071004.1 | FKB/SONDE/M1 - RH values may be slightly overcorrected. | fkbsondewnpnM1.b1 |
D100216.4 | FKB/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields | fkbvceil25kM1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/11/2007 | 0430 | 09/19/2007 | 0430 |
Subject: | FKB/SONDE/M1 - RH values may be slightly overcorrected. |
DataStreams: | fkbsondewnpnM1.b1 |
Description: | The desiccant in the GC25 ground check set began to lose efficiency at the beginning of this time period. Prior to 9/11/2007 the radiosonde RH readings while in the GC25 (assumed RH=0%) were below 1%RH. The RH readings began to exceed 1%RH on 9/11/2007 and increased more or less exponentially to 2.3% RH by the end of 9/18/2007. The desiccant was changed on 9/19/2007 and the radiosonde RH values while in the GC25 again dropped within the acceptable limit (< 0.5%RH, in fact). Because the value obtained from the radiosonde while in the GC25 is subtracted from the subsequent RH values as part of the ground check procedure, it is likely that soundings done late in this period may be biased low by no more than 2%RH. The exact amount of the correction applied is included in the netCDF header of each file. |
Measurements: | fkbsondewnpnM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/12/2007 | 0000 | 01/01/2008 | 2359 |
Subject: | FKB/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields |
DataStreams: | fkbvceil25kM1.b1 |
Description: | Attribute serial_number: In most cases, this field is not representative of the actual serial number of the instrument because the value did not change when an instrument changed locations or was replaced with a spare. Variable sum_backscatter: An out-of-range condition for the "sum of detected and normalized backscatter" was reported as 0 instead of missing (-9999). The valid range is 0 - 0.0999 /srad. |
Measurements: | fkbvceil25kM1.b1:
|