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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Interferometry With ALOS-2 Full-Aperture ScanSAR Data
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Interferometry With ALOS-2 Full-Aperture ScanSAR Data

机译：ALOS-2全孔径ScanSAR数据的干涉测量

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摘要

Advanced Land Observing Satellite-2 (ALOS-2) is designed to routinely acquire both scanning synthetic aperture radar (ScanSAR) and stripmap data. In this paper, we present a special multiband bandpass filter (MBF) to remove azimuth nonoverlap spectra for the interferometric processing of ALOS-2 full-aperture ScanSAR product. As required by the MBF, we estimate the important ScanSAR system parameters and the start times of raw bursts using ALOS-2 full-aperture ScanSAR image. The resulting MBF can remove the nonoverlap spectra caused by both Doppler centroid frequency difference and burst misalignment. It can be used in ScanSAR-ScanSAR interferometry, as well as ScanSAR-stripmap interferometry. Based on the MBF, we propose a single processing workflow that is able to implement both ScanSAR-ScanSAR interferometry and ScanSAR-stripmap interferometry. Finally, we present example interferograms of the 2015 Gorkha earthquake in Nepal processed using the proposed processing workflow. The interferograms are greatly improved after applying the MBF to remove the significant amount of nonoverlap spectra in the data.
机译：Advanced Land Observing Satellite-2（ALOS-2）旨在定期采集扫描合成孔径雷达（ScanSAR）和带状图数据。在本文中，我们提出了一种特殊的多带通滤波器（MBF），以去除方位角非重叠谱，用于ALOS-2全孔径ScanSAR产品的干涉处理。根据MBF的要求，我们使用ALOS-2全孔径ScanSAR图像估算重要的ScanSAR系统参数和原始脉冲串的开始时间。所得的MBF可以消除由多普勒质心频率差和猝发未对准引起的非重叠频谱。它可以用于ScanSAR-ScanSAR干涉测量以及ScanSAR-stripmap干涉测量。基于MBF，我们提出了一个单一的工作流程，该流程能够同时实现ScanSAR-ScanSAR干涉测量和ScanSAR-stripmap干涉测量。最后，我们展示了使用拟议的处理工作流程处理的尼泊尔2015年Gorkha地震的干涉图示例。应用MBF去除数据中大量的非重叠光谱后，干涉图得到了极大的改善。

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