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VIIRS Cloud Mask (VCM) – IICMO File

VOCCO. VIIRS Cloud Mask (VCM) – IICMO File. Observed Issue:. Pixels that are near the aggregation zone (-999.7) and in cloudy region are not being flagged as cloud. Inaccurately derived ocean color products in these locations are “bleeding” into our results which

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VIIRS Cloud Mask (VCM) – IICMO File

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  1. VOCCO VIIRS Cloud Mask (VCM) – IICMO File Observed Issue: • Pixels that are near the aggregation • zone (-999.7) and in cloudy region • are not being flagged as cloud. • Inaccurately derived ocean color • products in these locations are • “bleeding” into our results which • are not accurate. Northern Adriatic 05/08/2013 Chlorophyll Aggregation Zone NRL APS

  2. Lt_862 Clear Pixels Aggregation Zone VCM Cloud Mask • Problem areas observed • 2 lines above & below • aggregation zones: • Is this caused by: • gradient test (3x3)? • not being able to execute • default to confident clear • w/ poor quality? • missing input or limitation?

  3. 31 = Day Pixels, High Cloud -999.7 = HILT / Aggregation Zone Mask Quality, Confident Cloudy Problem Area Clear Pixels Aggregation Zone VCM Cloud Mask

  4. NRL current handling of VCM issue NRL APS VCM w/ Issue NRL APS Expanded HILT mask (-999.7 Agg. Zone) where VCM Cloud Mask Quality = 0 (Poor) Note: In this case no other cloud test are performed Why not set to low and continue other test? How does this relate to aggregation zone? VCM ATBD 474-00033 4/22/2011

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