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Volume 26 Issue 3
Jun.  2013
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Journal of Southwest Jiaotong University  > 2013  >  26(3): 448-454.
NIE Yunju, LIU Guoxiang, SHI Jinfeng, YU Bing, CHENG Penggen, ZHANG Rui, LI Tao. Interferometric Combination for Persistent Scatterer Interferometry Considering Interferometric Phase Noise and Its Application to Subsidence Monitoring[J]. Journal of Southwest Jiaotong University, 2013, 26(3): 448-454. doi: 10.3969/j.issn.0258-2724.2013.03.009
Citation: NIE Yunju, LIU Guoxiang, SHI Jinfeng, YU Bing, CHENG Penggen, ZHANG Rui, LI Tao. Interferometric Combination for Persistent Scatterer Interferometry Considering Interferometric Phase Noise and Its Application to Subsidence Monitoring[J]. Journal of Southwest Jiaotong University, 2013, 26(3): 448-454. doi: 10.3969/j.issn.0258-2724.2013.03.009
shu

Interferometric Combination for Persistent Scatterer Interferometry Considering Interferometric Phase Noise and Its Application to Subsidence Monitoring

doi: 10.3969/j.issn.0258-2724.2013.03.009
  • Received Date: 16 Dec 2011
  • Publish Date: 25 Jun 2013
    Abstract
  • In order to improve the accuracy of persistent scatterer interferometric (PSI) synthetic aperture radar for monitoring ground deformation, an improved interferometric combination mode was proposed by considering the thresholds of both spatial and temporal baselines, and taking into account the noise level in interferometric phases of all interferometric pairs. Experiments of subsidence monitoring using the proposed interferometric mode were performed using 16 high resolution SAR images collected by the X-band radar sensor onboard the German satellite TerraSAR-X over Shanghai. The results show that the minimum interferometric pairs (92) and the maximum persistent scatterer (PS) points (27 026) can be obtained by the proposed method. Compared with the ground-based measurements, the subsidence rate derived by the PSI technique has an error of ?3.89 mm/a, with a precision being 1.86-3.00 times higher than that of other available modes. This demonstrates the effectiveness and reliability of the proposed interferometric mode.

     

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