NDLI: Dual-aspect geometric and radiometric terrain correction method for high-resolution SAR data

Content Provider	IEEE Xplore Digital Library
Author	Guojun Wang Wan Zi Chou Xie Fengli Zhang
Copyright Year	2011
Description	Author affiliation: Institute of Remote Sensmg Applications, Chinese Academy of Sciences, Division of Microwave Remote Sensing, DatunRoad, Chaoyang District, Beijing 100101, China (Guojun Wang; Wan Zi; Chou Xie; Fengli Zhang)
Abstract	Because of side looking illumination, terrain undulations affect the geometric and radiometric quality of synthetic aperture radar images. The correction of these effects becomes indispensable when quantitative image analysis is performed with respect to the derivation of geo- and biophysical parameters. In this paper a newly dual-aspect geometric and radiometric terrain correction method based on RD (Range Doppler) is put forward for geometric and radiometric correction of SAR images. This method is based on a pair of SAR images acquired from dual aspects. First either of the dual-aspect SAR image is ortho-rectified and radiometric slope corrected after the imaging geometry is reconstructed using a DEM (digital elevation model). This process could correct terrain caused geometric distortions and distorted backscatter coefficient caused by foreshortening. Then one image was used to compensate the lost information in shadow and layover areas in the other image. The resulting backscattermg images are fully terrain corrected. At last an optimal SAR incidence angle pair selection plan based on SAR simulation was given and this method could help the users to order the SAR data which would achieve the best compensation result.
Starting Page	1894
Ending Page	1897
File Size	1511280
Page Count	4
File Format	PDF
ISBN	9781457710032
ISSN	21537003
e-ISBN	9781457710056
DOI	10.1109/IGARSS.2011.6049494
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dual-aspect compensation SAR RD Model Ortho-rectification Radiometric slope correction
Content Type	Text
Resource Type	Article

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