Science China Earth Sciences

, Volume 55, Issue 12, pp 1961–1971

Correcting ionospheric effects and monitoring two-dimensional displacement fields with multiple-aperture InSAR technology with application to the Yushu earthquake

  • Jun Hu
  • ZhiWei Li
  • Lei Zhang
  • XiaoLi Ding
  • JianJun Zhu
  • Qian Sun
  • Wei Ding
Research Paper

DOI: 10.1007/s11430-012-4509-x

Cite this article as:
Hu, J., Li, Z., Zhang, L. et al. Sci. China Earth Sci. (2012) 55: 1961. doi:10.1007/s11430-012-4509-x

Abstract

Differential synthetic aperture radar interferometry (D-InSAR) can only measure one-dimensional surface displacements along the line-of-sight (LOS) direction which greatly inhibits its development and application. In this paper, we introduce a novel approach to measuring two-dimensional (2-D) surface displacements by exploiting a single InSAR pair, which is called multi-aperture InSAR (MAI) technology. We study the effects of baseline errors and the ionosphere on MAI technology and develop a directional filter and interpolator to minimize the ionospheric effects. A PALSAR image pair covering the 2010 Yushu earthquake is used to estimate the 2-D displacement fields of the earthquake using the MAI approach. The experimental results show that MAI is superior to conventional Offset-Tracking and therefore has great potential in co-seismic displacement measurement and source parameter inversion.

Keywords

D-InSARMAIL-bandionospheric effectstwo-dimensional displacementsYushu earthquake

Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Jun Hu
    • 1
  • ZhiWei Li
    • 1
  • Lei Zhang
    • 2
  • XiaoLi Ding
    • 2
  • JianJun Zhu
    • 1
  • Qian Sun
    • 1
  • Wei Ding
    • 1
  1. 1.School of Geosciences and Info-PhysicsCentral South UniversityChangshaChina
  2. 2.Department of Land Surveying & Geo-InformaticsThe Hong Kong Polytechnic UniversityHong KongChina