Wind-fetch dependence of Seasat scatterometer measurements

This work is focused on the effects of large-scale wind-generated gravity waves on scatterometer wind-measurement accuracy. We present theoretical and experimental evidence of the important role played by the degree of wind-wave coupling in surface geometry and therefore in microwave signatures. Sea...

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Bibliographic Details
Published in:International journal of remote sensing 1987-11, Vol.8 (11), p.1641-1647
Main Author: GLAZMAN, ROMAN E.
Format: Article
Language:English
Subjects:
analysis
Earth, ocean, space
Exact sciences and technology
External geophysics
Marine
microwave radar
microwaves
Physics of the oceans
reliability
remote sensing
scatterometers
Sea-air exchange processes
Spacecraft Instrumentation
wind measurement
wind-wave interaction
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Summary:This work is focused on the effects of large-scale wind-generated gravity waves on scatterometer wind-measurement accuracy. We present theoretical and experimental evidence of the important role played by the degree of wind-wave coupling in surface geometry and therefore in microwave signatures. Seasat scatterometer wind-measurement errors are analysed, and an error bias is found to be related to the degree of wind-wave development. Attention is focused on a dynamic measure of wind-wave development that characterizes the rate of energy transfer from the mean wind to the energy-carrying portion of the wave spectrum. An explanation of the bias is suggested based on the consideration of an additional component of surface scattering caused by electromagnetic-wave diffraction at the crests of individual, sufficiently steep wavelets.
ISSN:0143-1161
1366-5901
DOI:10.1080/01431168708954804