• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 30 Issue 1
Jan.  2017
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Article Contents
HUANG Qihuan, YUE Jianping. GBSAR Atmospheric Turbulence Calibration Based on Weighted Stable Points[J]. Journal of Southwest Jiaotong University, 2017, 30(1): 202-208. doi: 10.3969/j.issn.0258-2724.2017.01.028
Citation: HUANG Qihuan, YUE Jianping. GBSAR Atmospheric Turbulence Calibration Based on Weighted Stable Points[J]. Journal of Southwest Jiaotong University, 2017, 30(1): 202-208. doi: 10.3969/j.issn.0258-2724.2017.01.028

GBSAR Atmospheric Turbulence Calibration Based on Weighted Stable Points

doi: 10.3969/j.issn.0258-2724.2017.01.028
  • Received Date: 06 Feb 2015
  • Publish Date: 25 Feb 2017
  • Atmospheric disturbance is one of the key factors affecting the accuracy of ground based synthetic aperture radar (GBSAR) interferometry for deformation monitoring. Considering the correlation of atmosphere delay with azimuth direction, a new GBSAR atmospheric turbulence calibration method based on distance-weighted stable points is proposed. In this method, the atmospheric disturbance factor is first calculated from the stable points, and the images which are severely affected by atmospheric disturbance are removed using the length of the atmospheric disturbance factor. Then, the atmospheric disturbance factor of unstable pixels are obtained by distance-weighting of stable points to calibrate the atmospheric disturbance on unstable pixels and derive the final product of deformation information. As a case study, the proposed method was applied to the deformation monitoring of Geheyan dam using the IBIS-L GBSAR system. The results show that the maximum deformation affected by the atmospheric disturbance along the radar line of sight (LOS) reaches 75 mm, but the influence is significantly reduced after the calibration with the presented method. The accuracy of the deformation monitoring was improved to 1 mm, and the monitored deformation trend has a good agreement with the plummet measurements.

     

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