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首页> 外文期刊>IEEE Transactions on Aerospace and Electronic Systems >SAR data focusing using seismic migration techniques
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SAR data focusing using seismic migration techniques

机译：使用地震偏移技术聚焦SAR数据

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摘要

The focusing of synthetic-aperture-radar (SAR) data using migration techniques quite similar to those used in geophysics is treated. The algorithm presented works in the omega -k/sub x/ domain. Because time delays can be easily accommodated with phase shifts that increase linearly with omega , range migration poses no problem. The algorithm is described in plane geometry first, where range migration and phase history can be exactly matched. The effects of the sphericity of the Earth, of the Earth's rotation, and of the satellite trajectory curvature are taken into account, showing that the theoretically achievable spatial resolution is well within the requirements of present day and near future SAR missions. Terrestrial swaths as wide as 100 km can be focused simultaneously with no serious degradation. The algorithm has been tested with synthetic data, with Seasat-A data, and with airplane data (NASA-AIR). The experimental results fully support the theoretical analysis.
机译：使用与地球物理中使用的偏移技术非常相似的偏移技术对合成孔径雷达（SAR）数据进行了聚焦。提出的算法在omega -k / sub x /域中有效。因为时间延迟可以轻松地随随ω线性增加的相移而适应，所以范围迁移没有问题。首先在平面几何中描述该算法，其中可以精确匹配范围迁移和相历史。考虑到地球的球形度，地球的自转以及卫星轨迹曲率的影响，表明理论上可达到的空间分辨率完全在当今和不久的将来的SAR任务的要求之内。可以同时聚焦长达100公里的地面，而不会造成严重的退化。该算法已经过综合数据，Seasat-A数据和飞机数据（NASA-AIR）的测试。实验结果完全支持理论分析。

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