A Global Optimal Coherence Method for Multi-baseline InSAR Elevation Inversion

doi:10.11947/j.AGCS.2015.20140694

Abstract

Abstract: A global optimal coherence method for elevation inversion from multi-baseline polarimetric InSAR data is proposed. The multi-baseline polarimetric InSAR data used in experiments were obtained by Chinese X-SAR system and Germany's E-SAR system. Through combining several full polarimetric InSAR images, the proposed method constructs the multi-baseline polarimetric InSAR coherency matrix, and solves the optimal interferograms under global optimal coherence criterion. The optimal interferograms generated by global optimal coherence method were used to calculate the elevation of target with multi-baseline InSAR elevation inversion method. The proposed method reduces the influence of different scattering centers effectively using multi-baseline InSAR, which improves the accuracy and reliability of the interferometric phase and eventually improves the accuracy of DEM. The results verify the validity of the proposed method.

Key words: multibaseline, interferometric SAR, polarimetric coherence optimization, elevation inversion, scattering center

CLC Number:

P237

HUA Fenfen, ZHAO Zheng, WANG Mengmeng, ZHANG Jixian, HUANG Guoman. A Global Optimal Coherence Method for Multi-baseline InSAR Elevation Inversion[J]. Acta Geodaetica et Cartographica Sinica, 2015, 44(11): 1263-1270.

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