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Proceedings Paper

Topography optimization for accurate interferometric phase generation
Author(s): Abdelfattah Riadh; Nicolas J. Marie; Boussema Mohamed Rached
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Paper Abstract

This paper deals with a new exact formulation using SAR interferometry approach to extract accurate terrain elevation. By using the geometric formulation relating the elevation of a ground point to the phase difference of SAR images, we obtain an exact third order expansion with Maple software. Compared with this expansion, the second order one presents an error which can be expressed in terms of fringes shift in the interferogram. As the geometric InSAR formulation is different from one author to another, we present the utility of our work, and compare our results with those obtained by Lin (1991). We demonstrate that our more general formulation yields the development adopted by Prati and Rocca for interferogram generation. We also describe the procedure for phase generation from interferometric image pair. The baseline computation depends on the choice of the path length difference that we decide to adopt. By the same way, we illustrate the effects of the earth rotundity on the map resolution accuracy.

Paper Details

Date Published: 20 November 1998
PDF: 6 pages
Proc. SPIE 3497, SAR Image Analysis, Modeling, and Techniques, (20 November 1998); doi: 10.1117/12.331357
Show Author Affiliations
Abdelfattah Riadh, Ecole Nationale d'Ingenieurs de Tunis (Tunisia)
Nicolas J. Marie, Ecole Nationale Superieure des Telecommunications (France)
Boussema Mohamed Rached, Ecole Nationale d'Ingenieurs de Tunis (Tunisia)


Published in SPIE Proceedings Vol. 3497:
SAR Image Analysis, Modeling, and Techniques
Francesco Posa, Editor(s)

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