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A simple implementation of multi-baseline INSAR

Multi-baseline INSAR is a kind of technology that obtains terrain height information using multiple SAR images, therefore, it has a better performance than single-baseline INSAR. There are primarily two methods to increase the accuracy of terrain height estimation. One increases the quality of the interferometric absolute phase image by utilizing several single-look complex images. The other decreases the errors of the terrain height estimation through iterative ways. Integrating the former method and noise-immune phase unwrapping method, this paper presents a realistic method to implement multi-baseline INSAR. This method mainly includes two steps; the first one is about how to obtain multi-baseline interferometric absolute phase image whereas the second one is the unwrapping mechanism. Then, through simulation, the achieved results not only demonstrate the validity and practicability of the method, but also prove that the performance of the multi-baseline INSAR is much better than single-baseline INSAR.