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T/R Module Performance Monitoring of the TerraSAR-X Active Phased Array Antenna

Bräutigam, Benjamin and Schwerdt, Marco and Bachmann, Markus (2008) T/R Module Performance Monitoring of the TerraSAR-X Active Phased Array Antenna. In: Proceedings of the CEOS SAR Workshop on Calibration and Validation (CEOS SAR CalVal), p. 1. CEOS SAR Workshop on Calibration and Validation (CEOS SAR CalVal), 2008-11-27 - 2008-11-28, Oberpfaffenhofen, Germany.

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Abstract

The German remote sensing satellite TerraSAR-X, launched in 2007, hosts a flexible X-Band synthetic aperture radar (SAR) operating in Stripmap, Spotlight, ScanSAR, and additional experimental modes. For these various antenna beams, its active phased array antenna electronically steers and shapes the patterns in azimuth and elevation direction. The array consists of 384 radiating sub-arrays for horizontal and vertical polarisation each. Each individual array element is controlled by a transmit/receive (T/R) module to adjust phase and gain in a very short time. This paper demonstrates the excellent accuracy of this novel PN Gating technique down to accuracies of better than 0.1dB. During on-ground characterisation of the TerraSAR-X instrument this technique has established as a crucial diagnostic tool for functional checks. After launch, this innovative method is applied for in-flight performance monitoring of the TerraSAR-X antenna front-end. The technique described above is also applicable for characterisation and calibration of other advanced sensor systems coping with active phased arrays.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:T/R Module Performance Monitoring of the TerraSAR-X Active Phased Array Antenna
Authors:
AuthorsInstitution or Email of Authors
Bräutigam, BenjaminUNSPECIFIED
Schwerdt, MarcoUNSPECIFIED
Bachmann, MarkusUNSPECIFIED
Date:November 2008
Journal or Publication Title:Proceedings of the CEOS SAR Workshop on Calibration and Validation (CEOS SAR CalVal)
Refereed publication:No
In ISI Web of Science:No
Page Range:p. 1
Status:Published
Keywords:TerraSAR-X, Calibration, PN Gating, T/R Module, Radiometric Stability
Event Title:CEOS SAR Workshop on Calibration and Validation (CEOS SAR CalVal)
Event Location:Oberpfaffenhofen, Germany
Event Type:international Conference
Event Dates:2008-11-27 - 2008-11-28
Organizer:DLR
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:27 Nov 2008
Last Modified:12 Dec 2013 20:34

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