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Near-Real Time Cloud Properties and Aircraft Icing Indices from GEO and LEO SatellitesImagers on many of the current and future operational meteorological satellites in geostationary Earth orbit (GEO) and lower Earth orbit (LEO) have enough spectral channels to derive cloud microphysical properties useful for a variety of applications. The products include cloud amount, phase, optical depth, temperature, height and pressure, thickness, effective particle size, and ice or liquid water path, shortwave albedo, and outgoing longwave radiation for each imager pixel. Because aircraft icing depends on cloud temperature, droplet size, and liquid water content as well as aircraft variables, it is possible to estimate the potential icing conditions from the cloud phase, temperature, effective droplet size, and liquid water path. A prototype icing index is currently being derived over the contiguous USA in near-real time from Geostationary Operational Environmental Satellite (GOES-10 and 12) data on a half-hourly basis and from NOAA- 16 Advanced Very High Resolution (AVHRR) data when available. Because the threshold-based algorithm is sensitive to small errors and differences in satellite imager and icing is complex process, a new probability based icing diagnosis technique is developed from a limited set of pilot reports. The algorithm produces reasonable patterns of icing probability and intensities when compared with independent model and pilot report data. Methods are discussed for improving the technique for incorporation into operational icing products.
Document ID
20040085987
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Minnis, Patrick
(NASA Langley Research Center Hampton, VA, United States)
Smith, William L., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Nguyen, Louis
(NASA Langley Research Center Hampton, VA, United States)
Spangenberg, D. A.
(AS and M, Inc. Hampton, VA, United States)
Heck, Patrick W.
(Wisconsin Univ. Madison, WI, United States)
Palikonda, Rabindra
(AS and M, Inc. Hampton, VA, United States)
Ayers, J. Kirk
(AS and M, Inc. Hampton, VA, United States)
Wolff, Cory
(National Center for Atmospheric Research Boulder, CO, United States)
Murray, John J.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: SPIE''s 49th Annual Meeting
Location: Denver, CO
Country: United States
Start Date: August 2, 2004
End Date: August 6, 2004
Sponsors: International Society for Optical Engineering
Funding Number(s)
CONTRACT_GRANT: DE-AI02-97ER-62341
OTHER: 23-728-40-10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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