Ultra Wide Swath Imaging with Multi-Channel ScanSAR
Ultra Wide Swath Imaging with Multi-Channel ScanSAR
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DOI：
10.1109/igarss.2008.4780017
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发表时间：
2008-07
期刊：
影响因子：
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通讯作者：
N. Gebert;G. Krieger;M. Younis;F. Bordoni;A. Moreira
中科院分区：
文献类型：
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作者：
N. Gebert;G. Krieger;M. Younis;F. Bordoni;A. Moreira
多通道合成孔径雷达（SAR）系统能够实现高分辨率宽测绘带成像，从而克服了传统SAR的固有局限性。文献[1]给出了一种基于方位向多孔径SAR信号重构与仰角接收数字波束形成相结合的可能实现方案。本论文将重点转向先进的概念，用于更宽扫描带的成像，同时仍然提供高方位分辨率[2]。在这方面，多通道合成孔径雷达系统在突发模式，如ScanSAR或TOPS的操作进行了介绍和应用多孔径重建算法突发模式数据的方面进行了分析。的数字处理网络的性能参数，如信号噪声比和方位模糊度信号比在多通道突发模式系统的影响被认为是嵌入在ScanSAR系统的设计实例，允许一个400公里宽的扫描带的成像与几何分辨率为5米。最后，给出了多通道TOPS系统的初步结果，并介绍了一种优化的TOPS处理方法。
Multi-channel synthetic aperture radar (SAR) systems enable high-resolution wide-swath imagery thus overcoming the inherent limitation of conventional SAR. A possible realization based on the combination of multi-aperture SAR signal reconstruction in azimuth with digital beamforming on receive in elevation is given in [1]. The present paper turns focus to advanced concepts for the imaging of even wider swaths while still providing high azimuth resolution [2]. In this regard, the operation of multi-channel SAR systems in burst modes like ScanSAR or TOPS is introduced and aspects of applying the multi-aperture reconstruction algorithm to burst mode data are analyzed. The influence of the digital processing network on performance parameters as signal-to-noise-ratio and azimuth ambiguity-to-signal-ratio in multi-channel burst mode systems is considered and embedded in the design example of a ScanSAR system that allows for the imaging of a 400 km wide swath with a geometric resolution of 5 m. Finally, first results for a multi-channel TOPS system are presented and an optimized TOPS processing approach is introduced.