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Proceedings Paper

Deformation detecting algorithms with auxiliary GPS data in SAR interferogram
Author(s): Tao Li; Jingnan Liu
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Paper Abstract

Recently, SAR interferometry (InSAR) is popular in low-resolution DEM generation and high precision deformation measurement. There are many uncertain errors in InSAR processing that cannot be modeled and eliminated, such as tropospheric delay, phase unwrapping error, baseline error, and propagating noise. As we cannot decrease these errors just by SAR data processing, many other means have been presented to solve the problems. GPS signal and SAR signal are microwave of the same kind, and have the same attribute in propagation, so we can integrate GPS data into InSAR data to eliminate the same propagating errors in the aerosphere. What is more, GPS can observe high precision deformation better than differential InSAR has done. It is valuable to compare the results derived from these two methods. Researaches undertaken by some institutes on integration of GPS and InSAR have shown a prospective future. Therefore, this paper aims to analyze the methods of GPS and InSAR integration and apply them into the case study of city subsidence.

Paper Details

Date Published: 25 September 2003
PDF: 4 pages
Proc. SPIE 5286, Third International Symposium on Multispectral Image Processing and Pattern Recognition, (25 September 2003);
Show Author Affiliations
Tao Li, Wuhan Univ. (China)
Jingnan Liu, Wuhan Univ. (China)

Published in SPIE Proceedings Vol. 5286:
Third International Symposium on Multispectral Image Processing and Pattern Recognition
Hanqing Lu; Tianxu Zhang, Editor(s)

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