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Wind estimates from cloud motions: Phase 1 of an in situ aircraft verification experimentAn initial experiment was conducted to verify geostationary satellite derived cloud motion wind estimates with in situ aircraft wind velocity measurements. Case histories of one-half hour to two hours were obtained for 3-10km diameter cumulus cloud systems on 6 days. Also, one cirrus cloud case was obtained. In most cases the clouds were discrete enough that both the cloud motion and the ambient wind could be measured with the same aircraft Inertial Navigation System (INS). Since the INS drift error is the same for both the cloud motion and wind measurements, the drift error subtracts out of the relative motion determinations. The magnitude of the vector difference between the cloud motion and the ambient wind at the cloud base averaged 1.2 m/sec. The wind vector at higher levels in the cloud layer differed by about 3 m/sec to 5 m/sec from the cloud motion vector.
Document ID
19750009797
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Hasler, A. F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Shenk, W. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Skillman, W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
December 1, 1974
Subject Category
Geophysics
Report/Patent Number
X-911-74-365
NASA-TM-X-70826
Accession Number
75N17869
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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