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Integration of multiplatform/multisensor satellite global cloud analyses within SERCAA

As part of an overall plan for upgrading its existing real time cloud analysis (RTNEPH) and forecast system the Air Force has sponsored the Support of Environmental Requirements for Cloud Analysis and Archive (SERCAA) initiative. The main focus of SERCAA is development of a cloud analysis model capable of analyzing multisource satellite data from NOAA/AVHRR, DMSP/OLS and the multiple geostationary platforms. Separate cloud analysis algorithms have been developed which exploit the inherent strengths of each sensor suite, with the multiple analysis results then integrated to produce a single consistent global analysis. The cloud analysis parameters which will be merged include total cloud fraction, number of cloud layers (up to 4 `floating' layers will be permitted), layer cloud fraction, layer height, and layer type. The integrated analyses are generated on a polar stereographic grid at a spatial resolution of approximately 25 X 25 km. Test case results using data from 1993 are presented which highlight various aspects and of the analysis and integration algorithms.