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Proceedings Paper

Directional distribution of wind vectors observed by QuikSCAT/SeaWinds
Author(s): Naoto Ebuchi
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Paper Abstract

In order to validate wind vectors observed by QuikSCAT (QSCAT)/SeaWinds, statistical distributions of wind directions are investigated by comparison with those from numerical weather prediction wind analyses. Frequency distribution of wind directions relative to spacecraft flight direction is calculated form the QSCAT data for a period of two months to assess the self-consistency of the wind directions. It is found that the QSCAT wind vectors exhibit systematic directional preference relative to antenna beams, which is very similar to that found in the NASA Scatterometer (NSCAT) winds Sharp spikes are discernible in the directional distributions and azimuth location of the spikes varies with cross-track cell location reflecting azimuth angle combination of scatterometer beams. The variation of azimuth location of the spikes is interpreted by using a simple model which examines effects of errors in the geophysical model function on the retrieved winds. It is concluded that the artificial directivities are caused by imperfections in the geophysical model function used to retrieve the wind vectors.

Paper Details

Date Published: 21 December 2000
PDF: 10 pages
Proc. SPIE 4152, Microwave Remote Sensing of the Atmosphere and Environment II, (21 December 2000); doi: 10.1117/12.410587
Show Author Affiliations
Naoto Ebuchi, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 4152:
Microwave Remote Sensing of the Atmosphere and Environment II
Thomas T. Wilheit; Harunobu Masuko; Hiroyuki Wakabayashi, Editor(s)

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