ASTER cloud coverage reassessment using MODIS cloud mask products

Hideyuki Tonooka; Kunjuro Omagari; Hirokazu Yamamoto; Tetsushi Tachikawa; Masaru Fujita; Zaoreguli Paitaer

doi:10.1117/12.869605

4 November 2010 ASTER cloud coverage reassessment using MODIS cloud mask products

Hideyuki Tonooka, Kunjuro Omagari, Hirokazu Yamamoto, Tetsushi Tachikawa, Masaru Fujita, Zaoreguli Paitaer

Proceedings Volume 7862, Earth Observing Missions and Sensors: Development, Implementation, and Characterization; 78620S (2010) https://doi.org/10.1117/12.869605
Event: SPIE Asia-Pacific Remote Sensing, 2010, Incheon, Korea, Republic of

Abstract

In the Advanced Spaceborne Thermal Emission and Reflection radiometer (ASTER) Project, two kinds of algorithms are used for cloud assessment in Level-1 processing. The first algorithm based on the LANDSAT-5 TM Automatic Cloud Cover Assessment (ACCA) algorithm is used for a part of daytime scenes observed with only VNIR bands and all nighttime scenes, and the second algorithm based on the LANDSAT-7 ETM+ ACCA algorithm is used for most of daytime scenes observed with all spectral bands. However, the first algorithm does not work well for lack of some spectral bands sensitive to cloud detection, and the two algorithms have been less accurate over snow/ice covered areas since April 2008 when the SWIR subsystem developed troubles. In addition, they perform less well for some combinations of surface type and sun elevation angle. We, therefore, have developed the ASTER cloud coverage reassessment system using MODIS cloud mask (MOD35) products, and have reassessed cloud coverage for all ASTER archived scenes (>1.7 million scenes). All of the new cloud coverage data are included in Image Management System (IMS) databases of the ASTER Ground Data System (GDS) and NASA's Land Process Data Active Archive Center (LP DAAC) and used for ASTER product search by users, and cloud mask images are distributed to users through Internet. Daily upcoming scenes (about 400 scenes per day) are reassessed and inserted into the IMS databases in 5 to 7 days after each scene observation date. Some validation studies for the new cloud coverage data and some mission-related analyses using those data are also demonstrated in the present paper.

Citation Download Citation

Hideyuki Tonooka, Kunjuro Omagari, Hirokazu Yamamoto, Tetsushi Tachikawa, Masaru Fujita, and Zaoreguli Paitaer "ASTER cloud coverage reassessment using MODIS cloud mask products", Proc. SPIE 7862, Earth Observing Missions and Sensors: Development, Implementation, and Characterization, 78620S (4 November 2010); https://doi.org/10.1117/12.869605

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