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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Using Multibaseline InSAR to Recover Layovered Terrain Considering Wideband Array Problem
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Using Multibaseline InSAR to Recover Layovered Terrain Considering Wideband Array Problem

机译：考虑宽带阵列问题，使用多基线InSAR恢复覆盖的地形

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摘要

This letter deals with the problems of retrieving height and synthetic aperture radar (SAR) reflectivity of layovered terrain using multibaseline SAR interferometry (InSAR). In particular, we focus on the wideband array problem caused by practically large InSAR arrays and high-resolution SAR images, i.e., the problem of signal envelope misalignment, which is neglected in the work by Gini We propose two methods to eliminate or mitigate the effect of envelope misalignment, one called the aligning method and the other called the joint range cell processing method. In the aligning method, we align each signal envelope for each searched height of the layovered components (i.e., ground resolution cells with different altitudes) during searching procedure. The joint range cell processing method jointly processes the neighboring cells in range to estimate the parameters of layovered components so that the effect of the envelope misalignment can be mitigated. Theoretical analysis and computer simulation results show that both methods have the ability to provide accurate estimation of the heights and radar reflectivities of multiple layovered resolution cells in the presence of large envelope misalignments.
机译：这封信涉及使用多基线SAR干涉测量法（InSAR）来检索上空地形的高度和合成孔径雷达（SAR）反射率的问题。特别是，我们着重研究了由实际上很大的InSAR阵列和高分辨率SAR图像引起的宽带阵列问题，即信号包络失准问题，这在Gini的工作中被忽略了。我们提出了两种消除或减轻影响的方法包络未对准的问题，一种称为对准方法，另一种称为联合范围像元处理方法。在对齐方法中，我们在搜索过程中将每个信号包络对齐到每个经过搜索的上覆组件（即具有不同高度的地面分辨率单元）的高度。联合范围单元格处理方法联合处理范围内的相邻单元格，以估计上电组件的参数，从而可以减轻包络未对准的影响。理论分析和计算机仿真结果表明，在存在较大包络未对准的情况下，这两种方法均能够准确估计多个下分辨率分辨率单元的高度和雷达反射率。

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