SABRINA

A SAR bistatic receiver for interferometric applications

Journal article (2007)

Authors

Jesus Sanz-Marcos Universitat Politecnica de Catalunya
Paco López-Dekker Signal Theory and Comm. Dept., Mathematical Geodesy and Positioning - CEG , Universitat Politecnica de Catalunya
Jordi J. Mallorqui Universitat Politecnica de Catalunya
Albert Aguasca Universitat Politecnica de Catalunya
Pau Prats-Iraola Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)
Research Group
Mathematical Geodesy and Positioning (CEG) (TU Delft)
Interferometry Bistatic synthetic aperture radar Synthetic aperture radar (SAR) Sensor of opportunity
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Published Date

2007-4

Language

English

Reuse Rights

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Faculty

Civil Engineering & Geosciences

Department

Geoscience and Remote Sensing

Research Group

Mathematical Geodesy and Positioning

Abstract

This letter discusses the implementation of SABRINA, Synthetic Aperture radar Bistatic Receiver for Interferometric Applications. The ground resolution of a fixed-receiver bistatic system is studied, showing that it is comparable to that of a monostatic system. Due to the short distance from target to receiver, large sensitivity is obtained. The noncooperative nature of the bistatic system forces a conservative data-acquisition strategy based on continuously sampling the scattered signal during a temporal window around the predicted satellite overpass time. Also, to be able to synchronize the system in time and in frequency, sampling of a direct signal obtained through an antenna pointed at the satellite is required. Besides the signal processing required to phase-lock the received signal, the bistatic synthetic aperture radar processing needs to take into account the azimuth-dependent phase history. First focused images obtained with the SABRINA-ENVISAT combination are discussed.