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SABRINA: A SAR Bistatic Receiver for Interferometric Applications

机译：SABRINA：用于干涉测量应用的SAR双基地接收机

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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.
机译：这封信讨论了用于干涉测量应用的SABRINA（合成孔径雷达双基地接收机）的实现。研究了固定接收器双基地系统的地面分辨率，表明它与单基地系统的地面分辨率相当。由于目标到接收器的距离很短，因此可以获得较大的灵敏度。双基地系统的非合作性质迫使人们基于在预测的卫星越过时间周围的时间窗内连续采样散射信号而采取保守的数据采集策略。而且，为了能够在时间和频率上使系统同步，需要对通过指向卫星的天线获得的直接信号进行采样。除了将接收信号锁相所需的信号处理之外，双基地合成孔径雷达处理还需要考虑与方位角有关的相位历史。讨论了使用SABRINA-ENVISAT组合获得的第一个聚焦图像。

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