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    Ground deformation monitoring of Zhengzhou city from 2012 to 2013 using an improved IPTA

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    Fulltext not available
    Authors
    Yang, H.
    Peng, J.
    Wang, B.
    Song, Yongze
    Zhang, D.
    Li, L.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Yang, H.-L. and Peng, J.-H. and Wang, B.-C. and Song, Y.-Z. and Zhang, D.-X. and Li, L. 2015. Ground deformation monitoring of Zhengzhou city from 2012 to 2013 using an improved IPTA. Natural Hazards. 80 (1): pp. 1-17.
    Source Title
    Natural Hazards
    DOI
    10.1007/s11069-015-1953-x
    ISSN
    0921-030X
    Faculty
    Faculty of Humanities
    School
    School of Design and the Built Environment
    URI
    http://hdl.handle.net/20.500.11937/77052
    Collection
    • Curtin Research Publications
    Abstract

    © 2015, Springer Science+Business Media Dordrecht. To address the low efficiency of interferometric point target analysis for processing high-resolution SAR data, this paper proposes a novel thinning method for interferometric point target and an improved filtering method to reduce the large-scale atmospheric phase delay. The thinning method is used to ensure the quality of PS point based on point density, by which points in low-density area are kept, while redundant points in high-density area are removed. Analyzing thinned PSs is helpful in quickly obtaining the initial atmospheric delay, which facilitates the temporal phase unwrapping and promotes the efficiency of parameter calculation. Meanwhile, this paper proposes a filtering method for large-scale atmospheric phase delay with the fusion of multi-looking, spatial filtering and spatial interpolation methods. This method is simple and quick, compared with traditional spatial filtering methods. The case study of Zhengzhou city from 2012 to 2013 verifies that this method doubles the efficiency of the traditional data processing methods. Also, the precision of deformation velocity in this case study is up to 3.16 mm/a based on the comparison with the ground leveling measurement.

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