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Detection and correction of phase unwrapping errors in InSAR time series analysis with discrete coherent points

Lookup NU author(s): Professor Zhenhong Li

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Abstract

Due to temporal and spatial decorrelation and other noise, the integer-cycle jumps always appear in the unwrapped phase. It is well known that phase unwrapping errors represent one of the major limitations of Interferometric SAR (InSAR). A phase closure method is presented to detect and correct phase unwrapping errors for discrete coherent points in InSAR time series analysis. Its application to ENVISAT Advanced Synthetic Aperture Radar (ASAR) data over the coastal zone of Cangzhou, Hebei Province showed a significant improvement in the InSAR time series results, with the number of valid coherent pixels increasing from 68 000 to 186 400 and the root mean square (RMS) decreasing from 13.1 mm to 5.3 mm and 17.5 mm to 4.3 mm for two deforming areas respectively.

Publication metadata

Author(s): Li Y, Zhang J, Li Z, Jiang W, Luo Y, Zhao Y

Publication type: Article

Publication status: Published

Journal: Geomatics and Information Science of Wuhan University

Year: 2014

Volume: 39

Issue: 10

Pages: 1199-1203

Print publication date: 01/10/2014

Acceptance date: 01/01/1900

ISSN (print): 1671-8860

Publisher: Wuhan University

URL: http://ch.whu.edu.cn/EN/abstract/abstract3095.shtml

DOI: 10.13203/j.whugis20130010

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