Wrapped Staring Spotlight SAR

Journal Article (2016)
Author(s)

Josef Mittermayer (Deutsches Zentrum für Luft- und Raumfahrt (DLR))

Thomas Kraus (Deutsches Zentrum für Luft- und Raumfahrt (DLR))

Paco Dekker (Deutsches Zentrum für Luft- und Raumfahrt (DLR))

Pau Prats-Iraola (Deutsches Zentrum für Luft- und Raumfahrt (DLR))

Gerhard Krieger (Deutsches Zentrum für Luft- und Raumfahrt (DLR))

A Moreira (Deutsches Zentrum für Luft- und Raumfahrt (DLR))

Affiliation
External organisation
DOI related publication
https://doi.org/10.1109/TGRS.2016.2571340
More Info
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Publication Year
2016
Language
English
Affiliation
External organisation
Issue number
10
Volume number
54
Pages (from-to)
5745-5764

Abstract

This paper proposes the wrapped staring spotlight (WSS) SAR imaging mode, which is a new method to extend the azimuth steering capability for phased array SAR to achieve either an improved azimuth geometric or radiometric resolution. It investigates the utility of steering directions with main lobe gains that are smaller than that of the grating lobes and exposes how these directions can be exploited. Furthermore, two methods are proposed to reduce the speckle and the image noise at once, i.e., the Look-Normalized Pattern Correction and the Ω-weighting. Based on two example TerraSAR-X WSS acquisitions, the image performance of extended and point targets is discussed.

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