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New approach to strip-map SAR autofocus

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4 Author(s)
Wahl, D.E. ; Sandia Nat. Labs., Albuquerque, NM, USA ; Jakowatz, C.V., Jr. ; Thompson, P.A. ; Ghiglia, D.C.

This paper demonstrates how certain concepts from the Phase Gradient Autofocus (PGA) algorithm for automated refocus of spotlight mode SAR imagery may be used to design a similar algorithm that applies to SAR imagery formed in the conventional strip-mapping mode. The algorithm derivation begins with the traditional view of strip-map image formation as convolution (compression) using a linear FM chirp sequence. The appropriate analogies and modifications to the spotlight mode case are used to describe a working algorithm for strip-map autofocus

Published in:

Digital Signal Processing Workshop, 1994., 1994 Sixth IEEE

Date of Conference:

2-5 Oct 1994

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