New approach to strip-map SAR autofocus

Author

Wahl, D.E. ; Jakowatz, C.V., Jr. ; Thompson, P.A. ; Ghiglia, D.C.

Author_Institution

Sandia Nat. Labs., Albuquerque, NM, USA

fYear

1994

fDate

2-5 Oct 1994

Firstpage

53

Lastpage

56

Abstract

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

Keywords

FM radar; convolution; data compression; frequency modulation; image coding; radar imaging; synthetic aperture radar; automated refocus; compression; convolution; linear FM chirp sequence; phase gradient autofocus algorithm; spotlight mode SAR imagery; strip-map SAR autofocus; strip-map image formation; strip-mapping mode; Algorithm design and analysis; Chirp; Convolution; Electronics packaging; Focusing; Image coding; Laboratories; Phase estimation; Robustness; Synthetic aperture radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Digital Signal Processing Workshop, 1994., 1994 Sixth IEEE

Conference_Location

Yosemite National Park, CA

Print_ISBN

0-7803-1948-6

Type

conf

DOI

10.1109/DSP.1994.379875

Filename

379875