INSAR干涉图滤波处理

PHASE NOISE FILTERINGS IN INSAR INTERFEROGRAM

合成孔径雷达干涉测量中干涉图的信噪比一般较低,影响了干涉测量产品的精度,因此在后继处理前必须对干涉图作滤波处理。本文在分析干涉图噪声的基础上,探讨了4种有效抑制干涉图噪声的滤波方法。

There exist a lot of phase noises in interferogram, which will adversely affect the product precision of interferometric synthetic aperture radar (INSAR). It is therefore very important to reduce the phase noise before phase unwrapping. In this paper, the authors deal with four noise filtering methods, namely multi-look processing, medium filtering, gradient-based adaptive filtering and additive filtering. In practice, the combination of these filtering methods would yield even better result.