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Level 1B
Instrument Performance History
Time-dependent list of Non-functional
or noisy detector
AQUA
Description | L1B Impact | L2 Impact | Cause | Mitigation | Schedule | History
DESCRIPTION:
Prior to the Aqua MODIS launch, Band 6 exhibited several anomalous detectors. Band 6 performance degraded seriously after launch and presently a majority of the Band 6 detectors are non-functional. Averaging across dead detectors is not possible for regions on the Band where several adjacent detectors are non-functional. One band 5 and several band 6 detectors are non-functional throughout the mission.
IMPACT TO L1B DATA SET:
Non-functional and noisy detectors are flagged to alert users. The L1B code does not calibrate EV pixels for Non-functional detectors. Instead, the scaled integer is interpolated from the nearest live detectors.
ESTIMATED IMPACT TO L2 SCIENCE PRODUCTS:
The L1B product handles non-functional detectors in a manner to facilitate building images with L1B production data using simple raster scan software for the image generation. Science users should read and use the non-functional detector flags and decide for themselves the optimum manner to handle non-functional detector "gaps" for their products.
CAUSE OF EFFECT:
Band 5 has one delaminated detector and band 6 has several delaminated detectors. Thermal cycling tends to increase delamination.
MITIGATION APPROACH/ADDED TESTING TO CHARACTERIZE EFFECT:
Data for non-functional detectors have been replaced by nearest live detector averages.
ESTIMATED SCHEDULE TO COMPLETE:
Tables of non-functional detectors are complete through December 2002. The production of new tables is an on-going effort.
HISTORY OF CHARACTERISTIC:
Aqua MODIS Collection 5 QA LUT Update History |
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QA LUT Version # |
Update Date |
Time Stamp |
Aqua QA Collection 5 LUT Update |
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Non-Functional Detectors (Product Order) |
Noisy Detectors (Product Order) |
Out-of-family Detectors (Product Order) |
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V5.0.1.0 |
12/7/2004 |
2002001 (pre-launch) |
Band/Detector # |
Band/Detector # |
Band/Detector # |
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5/20, 6/2,13,14,16,18,19,20 |
20/10, 36/5 |
21/1 |
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2002158.1807 |
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5/20, 6/2,6,10,12,13,14,15,16,18,19,20, |
6/17 |
21/1 |
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36/5 |
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2002178.1358 |
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5/20, 6/2,4,5,6,10,12,13,14, 6/15,16,18,19,20, |
6/17 |
21/1 |
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36/5 |
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2002189.1439 |
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5/20, |
6/17 |
21/1 |
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6/2,6,10,12,13,14,15, |
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6/16,18,19,20, |
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36/5 |
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2002255.1830 |
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5/20, |
6/17 |
21/1 |
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6/2,4,5,6,7,10,12,13, |
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6/14,15,16,18,19,20, |
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36/5 |
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V5.0.7.1 |
4/27/2005 |
2005010.1715 |
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5/20, |
6/17, 27/3 |
21/1 |
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6/2,4,5,6,7,10,12,13, |
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6/14,15,16,18,19,20, |
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36/5 |
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V5.0.7.15 |
11/13/2006 |
2006314.0000 |
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5/20, |
6/4, 6/17, 27/3 |
21/1 |
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6/2,4,5,6,7,10,12,13, |
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6/14,15,16,18,19,20, |
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36/5 |
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V5.0.35.1 |
02/07/2008 |
2007359.1020 |
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5/20, |
6/4, 6/17, 27/3, |
21/1 |
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6/2,4,5,6,7,10,12,13, |
29/8 |
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6/14,15,16,18,19,20, |
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36/5 |
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V5.0.35.2 |
03/19/2008 |
2008038.1750 |
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5/20, |
6/4, 6/17, 27/3, |
21/1 |
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6/2,4,5,6,7,10,12,13, |
29/2, 29/8 |
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6/14,15,16,18,19,20, |
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36/5 |
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Description | L1B Impact | L2 Impact | Cause | Mitigation | Schedule | History
Please contact Jack Xiong with any technical questions concerning these pages.
Responsible Civil Servant:
Dr. Jack Xiong <Xiaoxiong.Xiong.1@gsfc.nasa.gov>
Email mcst-webm@ssaihq.com to report any problem with the MCST Web Pages.
Last Update: Monday, May 12, 2008 1:47 PM