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Small-scale wind shear definition for aerospace vehicle design.Rawinsonde wind profile data provide adequate wind shear information for vertical height intervals greater than 1 km. To specify wind shears for intervals below 1 km for space vehicle design, detailed wind-profile information like that provided by the FPS-16 Radar/Jimsphere system or an extrapolation procedure is required. This paper is concerned with the latter alternative. It is assumed that any realization from an ensemble of wind profiles can be represented in terms of a Fourier integral. This permits the calculation of the ensemble standard deviation and mean of the corresponding shear ensemble for any altitude and shear interval in terms of the power spectrum of the ensemble of wind profiles. The results of these calculations show that the mean and standard deviation of the wind shear ensemble, as well as the wind shear for any percentile, asymptotically behave like the vertical interval to the 0.7 power. This result is in excellent agreement with shear data from Cape Kennedy, Fla.
Document ID
19720036021
Document Type
Reprint (Version printed in journal)
Authors
Fichtl, G. H. (NASA Marshall Space Flight Center Huntsville, Ala., United States)
Date Acquired
August 6, 2013
Publication Date
February 1, 1972
Publication Information
Publication: Journal of Spacecraft and Rockets
Volume: 9
Subject Category
SPACE VEHICLES
Distribution Limits
Public
Copyright
Other