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

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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.

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Authors and Affiliations

  1. School of Geosciences and Info-Physics, Central South University, Changsha, 410083, China

    Jun Hu, ZhiWei Li, JianJun Zhu, Qian Sun & Wei Ding

  2. Department of Land Surveying & Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong, China

    Lei Zhang & XiaoLi Ding

Authors
  1. Jun Hu
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  2. ZhiWei Li
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  3. Lei Zhang
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  4. XiaoLi Ding
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  5. JianJun Zhu
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  6. Qian Sun
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  7. Wei Ding
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Correspondence to ZhiWei Li.

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Hu, J., Li, Z., Zhang, L. et al. Correcting ionospheric effects and monitoring two-dimensional displacement fields with multiple-aperture InSAR technology with application to the Yushu earthquake. Sci. China Earth Sci. 55, 1961–1971 (2012). https://doi.org/10.1007/s11430-012-4509-x

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  • DOI: https://doi.org/10.1007/s11430-012-4509-x

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