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News
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Proposed C6 Aqua L1 and Cloud Mask Reprocessing
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09.24.2012
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The Aqua cold Focal Plane temperatures currently experience an increasing
orbital oscillation due to a decrease in radiative cooler margin. The
majority of the impact on MODIS data is captured by the scan-by-scan nature
of the calibration for thermal bands. A modified approach to derive the
non-linear calibration coefficients and compensate for the temperature
fluctuations was implemented in Aqua C6 forward processing as a LUT update
on 07/05/12 (6.1.17.1). Further investigation by MCST and the University of
Wisconsin atmosphere group indicated improvement in the C6 cloud top
properties L2 products if the modified approach is applied to the entire
mission. After approval by the science team, a revised C6 LUT will be
delivered and the affected Aqua C6 data, 2009/208 (07/27/09) to present,
will be reprocessed - new C6 L1B and cloud mask - and will replace what is
currently in the archive. The predominant impacts are only for bands 33, 35,
and 36, all other bands will have no or negligible differences from the
current L1B in the archive.
If you are currently using Aqua C6 L1B/cloud mask data for 2009/208 to
present, be advised that the reprocessed data will have differences,
particularly for bands 33, 35 and 36.
Update: Proposed C6 Aqua L1 and Cloud Mask Reprocessing Canceled
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