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GASP cloud encounter statistics - Implications for laminar flow control flightThe cloud observation archive from the NASA Global Atmospheric Sampling Program (GASP) is analyzed in order to derive the probability of cloud encounter at altitudes normally flown by commercial airliners, for application to a determination of the feasability of Laminar Flow Control (LFC) on long-range routes. The probability of cloud encounter is found to vary significantly with season. Several meteorological circulation features are apparent in the latitudinal distribution of cloud cover. The cloud encounter data are shown to be consistent with the classical midlatitude cyclone model with more clouds encountered in highs than in lows. Aircraft measurements of route-averaged time-in-clouds fit a gamma probability distribution model which is applied to estimate the probability of extended cloud encounter, and the associated loss of LFC effectiveness along seven high-density routes. The probability is demonstrated to be low.
Document ID
19850029828
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jasperson, W. H.
(Control Data Corp. Minneapolis, MN, United States)
Nastrom, G. D.
(Control Data Corp. Minneapolis, MN, United States)
Davis, R. E.
(NASA Langley Research Center Flight Electronics Div., Hampton, VA, United States)
Holdeman, J. D.
(NASA Lewis Research Center Aerothermodynamics and Fuels Div., Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
November 1, 1984
Publication Information
Publication: Journal of Aircraft
Volume: 21
ISSN: 0021-8669
Subject Category
Meteorology And Climatology
Accession Number
85A11979
Distribution Limits
Public
Copyright
Other

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