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TerraSAR-X Antenna Pattern Estimation by a Complex Treatment of Rainforest Measurements

Alvarez-Perez, Jose Luis and Schwerdt, Marco and Bachmann, Markus (2006) TerraSAR-X Antenna Pattern Estimation by a Complex Treatment of Rainforest Measurements. In: IEEE International Geoscience and Remote Sensing Symposium (IGARSS). IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2006-07-31 - 2006-08-04, Denver, Colorado.

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Abstract

Abstract—In this paper an elaborated development over the usual way of estimating a SAR antenna pattern with measurements over the rain forest is presented. The current standard procedure is to fit these data to a polynomial curve or sometimes to a power-cosine law. This antenna model is not a physical one but a convenient mathematical simplification to eliminate noise. This work’s contribution is the implementation of a physically meaningful model, i.e. a superposition of far-field wave fronts from each of the array elements, together with the Singular Value Decomposition (SVD) technique. In addition to eliminate noise, this method allows us to obtain an estimate of the in-flight corrected excitation laws of the antenna array. The motivation of the study is the characterisation of the German TerraSAR-X satellite antenna, a phased array consisting of 384 subarrays, each of which contains two slotted waveguides, one for horizontal and one for vertical polarisation. The utility of the technique is tested on data acquired by the ASAR instrument onboard the ESA ENVISAT satellite, more specifically from both image (IMP) and wide swath mode (WSM) products.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:TerraSAR-X Antenna Pattern Estimation by a Complex Treatment of Rainforest Measurements
Authors:
AuthorsInstitution or Email of Authors
Alvarez-Perez, Jose LuisDepartment of Signal Theory and Communications, Technical University of Catalonia (UPC)
Schwerdt, MarcoUNSPECIFIED
Bachmann, MarkusUNSPECIFIED
Date:August 2006
Journal or Publication Title:IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:TerraSAR-X, Antenna Pattern, Rainforest Measurements
Event Title:IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Event Location:Denver, Colorado
Event Type:international Conference
Event Dates:2006-07-31 - 2006-08-04
Organizer:IEEE
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 > Microwave Systems
Microwaves and Radar Institute
Deposited By: Dr.-Ing. Marco Schwerdt
Deposited On:20 Oct 2006
Last Modified:27 Apr 2009 13:09

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