SAR azimuth cut-off to estimate wind speed under high wind regimes

CORCIONE Valeria; NUNZIATA Ferdiinando; PORTABELLA Marcos; GRIECO Giuseppe; YANG Xiaofeng; MIGLIACCIO Maurizio

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SAR azimuth cut-off to estimate wind speed under high wind regimes
Vol. 24, Issue S1, Pages: 99-103(2020)
Received：21 October 2019，

Accepted：16 April 2020，

Published：07 June 2020
DOI：
稿件说明：

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DOI：

Corcione V,Nunziata F,Portabella M,Grieco G,Yang X F and Migliaccio M. 2020. SAR azimuth cut-off to estimate wind speed under high wind regimes. Journal of Remote Sensing(Chinese). 24(S1): 99-103 DOI：

摘要

Abstract

In this study

the azimuth cut-off method

typically used for SAR moderate wind speed estimation purposes

is analyzed under high wind regimes. Firstly

the importance of the pixel spacing

the size of the boxes selected for Synthetic Aperture Radar (SAR) image partitioning and the image texture in terms of homogeneities are discussed by considering their influence on the azimuth cut-off (λc) estimation. Secondly

a quality control analysis of the reliability of λc is carried out by evaluating the distance between the autocorrelation functions (ACF) and their correspondent fittings. This analysis points out the importance of filtering out the unreliable and unfeasible λc values in order to improve the wind speed estimation. The quality control procedure is based on a

test

applied on a large Sentinel-1A dataset. The soundness of the test is verified by an increment in terms of correlation between λc estimations and wind speed values.This approach is

then

applied under high wind regimes

i.e.; tropical cyclones.

关键词

Keywords

references

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