DQR ID | Subject | Data Streams Affected |
---|---|---|
D081030.2 | SGP/CSPHOT/C1 - AOT 1640 channel data missing | sgpcsphotaotC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotaotfiltqaC1.a1 |
D090716.2 | SGP/SWS/C1 - Contamination by scattered light on optics. | sgpswsC1.b1 |
D100215.1 | SGP/VCEIL/C1/B4/B5/B6 - Reprocess: Incorrect serial_number and sum_backscatter fields | sgpvceil25kB4.b1, sgpvceil25kB5.b1, sgpvceil25kB6.b1, sgpvceil25kC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/24/2008 | 0000 | 07/25/2010 | 2359 |
Subject: | SGP/CSPHOT/C1 - AOT 1640 channel data missing |
DataStreams: | sgpcsphotaotC1.a1, sgpcsphotaotfiltC1.a1, sgpcsphotalm1duboC1.a1, sgpcsphotaotfiltqaC1.a1 |
Description: | AOT 1640 channel data missing. The instrument deployed at SGP from September 2008 to July 2010 was not upgraded with this additional channel. |
Measurements: | sgpcsphotaotfiltqaC1.a1:
sgpcsphotalm1duboC1.a1:
sgpcsphotaotfiltC1.a1:
sgpcsphotaotC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/01/2006 | 0000 | 06/01/2009 | 0000 |
Subject: | SGP/SWS/C1 - Contamination by scattered light on optics. |
DataStreams: | sgpswsC1.b1 |
Description: | It has been observed that the zenith radiance measurement is susceptible to contamination from light scattered off of the internal optics. This problem is most serious when measuring clear sky radiance in the presence of direct sun. Under this worst case condition, it affects short wavelengths (less than 500 nm) at a few percent level, moderate wavelengths (500-800nm) between a few percent and 10-20%, and longer wavelengths up to 80% or more. Chui and Marshak have demonstrated some success at identifying isolated affected data using the TSI to find cases of scattered clouds. In general though, one must treat the zenith radiance data with considerable caution whenever direct solar radiance is likely to be present. It is anticipated that the SWS zenith radiance for overcast skies is not significantly affected. The instrument has been renovated by adding a sun shade to prevent direct sunlight from striking the optics. An additional set of baffles further restricts the field of view, further reducing the potential for even off-axis bright clouds to affect the zenith measurement. Data taken after June 2009 is considered to be free of contamination. |
Measurements: | sgpswsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 10/31/2009 | 2359 |
Subject: | SGP/VCEIL/C1/B4/B5/B6 - Reprocess: Incorrect serial_number and sum_backscatter fields |
DataStreams: | sgpvceil25kB4.b1, sgpvceil25kB5.b1, sgpvceil25kB6.b1, sgpvceil25kC1.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. This DQR also applies to a1 level data collected prior to b1 level. |
Measurements: | sgpvceil25kC1.b1:
sgpvceil25kB4.b1:
sgpvceil25kB6.b1:
sgpvceil25kB5.b1:
|