SABRINA: A SAR bistatic receiver for interferometric applications

被引:77
|
作者
Sanz-Marcos, Jesus [1 ]
Lopez-Dekker, Paco
Mallorqui, Jordi J.
Aguasca, Albert
Prats, Pau
机构
[1] Univ Politecn Cataluna, Remote Sensing Lab, Signal Theory & Commun Dept, Barcelona 08034, Spain
[2] DLR, Microwave & Radar Inst, D-82234 Oberpfaffenhofen, Germany
关键词
bistatic synthetic aperture radar; interferometry; sensor of opportunity; synthetic aperture radar (SAR);
D O I
10.1109/LGRS.2007.894144
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
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..
引用
收藏
页码:307 / 311
页数:5
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