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Reference Target Correction Based on Point Target SAR Simulation

Döring, Björn J. and Looser, Philipp and Jirousek, Matthias and Schwerdt, Marco (2012) Reference Target Correction Based on Point Target SAR Simulation. IEEE Transactions on Geoscience and Remote Sensing, 50 (3), pp. 951-959. IEEE. DOI: 10.1109/TGRS.2011.2162590.

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Official URL: http://ieee.org

Abstract

The backscattering from man-made point targets like passive corner reflectors and active transponders is often used as a radiometric calibration standard for synthetic aperture radar (SAR) calibration. As new systems emerge and the demand for more accurate systems increases, it becomes necessary to better understand the effects of real or imperfect targets on the radiometric calibration results. Therefore, a point target SAR simulator is presented which models the complete external radiometric calibration process. It incorporates a number of target properties like frequency response, transponder internal calibration strategies, noise, and interference signals, and it takes the instrument SAR mode settings into consideration. Thereby, the relevant target backscatter variation as observed in the processed SAR image with respect to an ideal or any other target can be determined. The simulation results are relevant during the design process of a new target as well as during the actual calibration of a SAR system. Based on these point target simulations, correction coefficients can be stated for each target and SAR mode, therefore decreasing the remaining radiometric point target uncertainties. The quantitative examples in this paper show that these corrections can influence the absolute radiometric calibration by more than 1 dB.

Document Type:Article
Additional Information:(c) 2011 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Title:Reference Target Correction Based on Point Target SAR Simulation
Authors:
AuthorsInstitution or Email of Authors
Döring, Björn J.UNSPECIFIED
Looser, PhilippUNSPECIFIED
Jirousek, MatthiasUNSPECIFIED
Schwerdt, MarcoUNSPECIFIED
Date:March 2012
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:50
DOI:10.1109/TGRS.2011.2162590
Page Range:pp. 951-959
Publisher:IEEE
Status:Published
Keywords:SAR calibration; point targets
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 - Projekt TerraSAR-X Kalibration und Projektunterstützung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Björn Döring
Deposited On:15 Dec 2011 10:41
Last Modified:12 Dec 2013 21:29

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