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The Frequency Scaling Algorithm and interferometric Spotlight SAR processing

Mittermayer, Josef (2002) The Frequency Scaling Algorithm and interferometric Spotlight SAR processing. Aerospace Science and Technology, 6, pp. 147-158. Elsevier.

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Abstract

This paper presents the Frequency Scaling Algorithm for phase preserving Spotlight SAR data processing and investigates the differences between Stripmap and Spotlight illumination. The algorithm performs the range cell migration correction for non-chirped raw data without interpolation by using a novel frequency scaling operation. The azimuth processing is based on a spectral analysis approach which is made highly accurate by azimuth scaling. In almost all processing stages, a subaperture approach is introduced for efficient azimuth processing. A method is proposed, which shows how to process Stripmap mode raw data in the Spotlight mode. The phase preservation of the Frequency Scaling Algorithm is proved by point target simulations and real raw data processing, including the generation of Spotlight interferograms. The same SAR Stripmap raw data set of DLR’s airborne system is processed in Stripmap and in Spotlight mode and the resulting detected images and interferograms are compared to each other. The differences due to the different range of squint angles used for the azimuth focusing are discussed.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2002,
Title:The Frequency Scaling Algorithm and interferometric Spotlight SAR processing
Authors:
AuthorsInstitution or Email of Authors
Mittermayer, JosefUNSPECIFIED
Date:2002
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:6
Page Range:pp. 147-158
Publisher:Elsevier
Status:Published
Keywords:SAR Signal Processing, Frequency Scaling Algorithm, Spotlight-SAR
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W -- no assignement (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Deposited By: Dr.-Ing. Josef Mittermayer
Deposited On:03 Feb 2006
Last Modified:06 Jan 2010 19:39

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