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In-Flight Performance Monitoring of TerraSAR-X Active Phased Array Antenna

Bräutigam, Benjamin and Bachmann, Markus and Schwerdt, Marco (2009) In-Flight Performance Monitoring of TerraSAR-X Active Phased Array Antenna. In: Proceedings of the German Microwave Conference (GeMiC), pp. 1-4. German Microwave Conference (GeMiC), 2009-03-16 - 2009-03-18, Munich, Germany.

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TerraSAR-X is a high resolution synthetic aperture radar (SAR) satellite launched in 2007. Its active phased array X-Band antenna hosts 384 transmit/receive modules (TRMs) controlling the beam shape and steering in azimuth and elevation. A mathematical antenna model approach is used for pattern optimisation and calculation of all possible operation beams. For keeping the excellent radiometric performance of the SAR system the front-end antenna must be monitored throughout mission life time and calibrated if necessary. A calibration network provides monitoring of the instrument behaviour by evaluating internal calibration pulses. Evaluation of these calibration pulses for every image acquisition guarantees high radiometric stability of all SAR products. This paper shows the latest in-orbit results of the antenna performance and TRM stability complementary to the traditional approach of external antenna measurements over calibration targets. For this purpose, the novel PN Gating method is applied in a spaceborne environment for the first time ever.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:In-Flight Performance Monitoring of TerraSAR-X Active Phased Array Antenna
AuthorsInstitution or Email of Authors
Bräutigam, BenjaminUNSPECIFIED
Bachmann, MarkusUNSPECIFIED
Schwerdt, MarcoUNSPECIFIED
Date:March 2009
Journal or Publication Title:Proceedings of the German Microwave Conference (GeMiC)
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 1-4
Keywords:TerraSAR-X, Calibration, SAR, Antenna
Event Title:German Microwave Conference (GeMiC)
Event Location:Munich, Germany
Event Type:international Conference
Event Dates:2009-03-16 - 2009-03-18
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
Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Benjamin Bräutigam
Deposited On:23 Mar 2009
Last Modified:12 Dec 2013 20:36

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