A method of high accuracy 3D location of airborne repeat pass InSAR

doi:10.7523/j.issn.2095-6134.2019.06.017

Abstract

Abstract: In realistic measurement of repeat pass interferometric synthetic aperture radar (RP-InSAR), two flight tracks do not coincide. The position shift and attitude of platforms keep changing. Irregular and obvious geomorphing is showed on interferometric complex images. It is difficult to calculate the 3D positioning of InSAR images. We analyzed the causes and effects of geometric distortions. A high precision positioning method is proposed, which is based on the high accuracy of InSAR imaging geometry. By correcting imaging parameters, the method achieves high accuracy 3D location of airborne RP-InSAR. InSAR image registration is achieved by extracting identical points. DEM with high accuracy is generated after interferometry. The high accuracy DEM is used to calculate the 3D positioning of InSAR images. Comparison between the measured positions and calculated positions of checkpoints shows that the proposed method is effective in solving the problem of 3D location of airborne RP-InSAR.

Key words: repeat pass, InSAR, 3D location, RD model

CLC Number:

TP751.1

DONG Xiaotong, HAN Chunming, YUE Xijuan, ZHAO Yinghui. A method of high accuracy 3D location of airborne repeat pass InSAR[J]. , 2019, 36(6): 844-850.

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