Acta Geodaetica et Cartographica Sinica ›› 2016, Vol. 45 ›› Issue (10): 1192-1199.doi: 10.11947/j.AGCS.2016.20160033

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A Fast Multi-layer Subnetwork Connection Method for Time Series InSAR Technique

WU Hong'an, ZHANG Yonghong, KANG Yonghui, GUO Ming   

  1. Institute of Photogrammetry and Remote Sensing, Chinese Academy of Surveying and Mapping, Beijing 100830, China
  • Received:2016-01-19 Revised:2016-06-17 Online:2016-10-20 Published:2016-11-08
  • Supported by:

    The National Natural Science Foundation of China (No. 41304010);The National Basic Research Program of China (973 Program) (No. 2012CB719905);The Fundamental Research Funds of CASM (No. 7771610)

Abstract:

Nowadays, times series interferometric synthetic aperture radar (InSAR) technique has been widely used in ground deformation monitoring, especially in urban areas where lots of stable point targets can be detected. However, in standard time series InSAR technique, affected by atmospheric correlation distance and the threshold of linear model coherence, the Delaunay triangulation for connecting point targets can be easily separated into many discontinuous subnetworks. Thus it is difficult to retrieve ground deformation in non-urban areas. In order to monitor ground deformation in large areas efficiently, a novel multi-layer subnetwork connection (MLSC) method is proposed for connecting all subnetworks. The advantage of the method is that it can quickly reduce the number of subnetworks with valid edges layer-by-layer. This method is compared with the existing complex network connecting mehod. The experimental results demonstrate that the data processing time of the proposed method is only 32.56% of the latter one.

Key words: time series InSAR, discontinuous subnetwork, MLSC, ground deformation monitoring

CLC Number: