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Dependence of image grey values on topography in SIR-B imagesThis paper focuses on the use of a high resolution digital elevation model (DEM) to aid in rectifying and enhancing synthetic aperture radar images. Using a synthetic backscatter image, the SIR-B images are manually rectified and resampled to remove geometric distortions caused by topography. In a second step, an improved reflectance function of incidence angle is derived from the DEM and the rectified image and this function is used to reduce radiometric effects of topography yielding an albedo image which clearly shows the thematic, as opposed to topographic content of the image. The procedure is tested on four SIR-B images of a scene in Argentina (crossover point) that is imaged under different azimuth and incidence angles. The similarity of the resulting images indicates that the procedure effectively reduces artefacts from the images that are dependent on topography.
Document ID
19880057422
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Domik, G.
(Vexcel Corp. Boulder, CO, United States)
Leberl, F.
(Vexcel Corp. Boulder, CO, United States)
Cimino, J.
(California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Date Acquired
August 13, 2013
Publication Date
May 1, 1988
Publication Information
Publication: International Journal of Remote Sensing
Volume: 9
ISSN: 0143-1161
Subject Category
Earth Resources And Remote Sensing
Accession Number
88A44649
Funding Number(s)
CONTRACT_GRANT: JPL-957549
Distribution Limits
Public
Copyright
Other

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