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Comparison of several multi-look processing procedures in INSAR processing for ERS-1&2 tandem mode

Comparison of several multi-look processing procedures in INSAR processing for ERS-1&2 tandem mode

ESA SP European Space Agency Special Publication

Multi-look processing, as a traditional method to reduce phase noise in SAR processing, has been used in INSAR processing since the INSAR techniques developed in the late 1970's. In INSAR processing, there are several possibilities to insert multi-look processing into the processing chain. The first method is to form an interferogram after two multi-look images have been obtained from two single-look images The second method is to obtain an interferogram by summing several multi-look processed interferograms. A third method is to produce an interferogram by filtering single-look interferometric image in the complex image domain. In this paper, we are aim to compare these multi-look processing procedures for ERS-1 and ERS-2 tandem mode data. The results will be evaluated by judging noise reduction in the interferogram and by the accuracy improvement in the 2-D phase unwrapping in INSAR processing.

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Accession: 018592650

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