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BIT Achieved Latest Results in Inversion Technology of Interference Synthetic Aperture Radar Deformation Based on Navigation Satellite

release date :2019-07-23 12:11:00  |   [ close window ]ViewCount:

    News Source: School of Information and Electronics

    Translator: News Agency of BIT, Li Jiaying

  

  “GNSS-Based SAR Interferometry for 3-D Deformation Retrieval: Algorithms and Feasibility Study”, the recent research result carried out by academician Mao Erke and professor Long Teng's innovation team of BIT School of Information and Electronics, was published in the top-rated journal in the field IEEE Transactions on Geoscience and Remote Sensing(IEEETGRS). Associate professor Liu Feifeng is the first author of the article and the corresponding author is associate professor Liu Quanhua.

Pic1 System Topological Configuration Diagram

  Inversion technology of interference synthetic aperture radar deformation based on navigation satellite(pic1) have advantages in spatio-temporal dual continuous monitoring, high accuracy and low cost, moreover, and it has wide application prospects in the field of earthquake monitoring such as landslide, surface subsidence and so forth.

Pic2 Radar image of a high-speed railway bridge area

  In the previous research result, the research team had already solved the problem of system imaging, however, there were still existence of difficulties in theory and algorithms in high precision inversion of three-dimensional deformation, accuracy evaluation model and so on. In this research, by introducing bistatic permanent scattering point (PS Point) technology, the group targeted proposed a multi-dimensional PS point association processing method, fused the multi-satellite observation data thus solved the problem of high precision inversion of three-dimensional deformation. Furthermore, by expanding geometric divergence factor model of traditional navigation and location accuracy, the group built a new extended GDOP model for interferometric synthetic aperture radar deformation inversion based on navigation satellite, and settled the problem of accurate accuracy assessment of Three-Dimensional deformation measurement in this technology.

Pic3 3-D Deformation Measurement Curve of Strong Point

  Furthermore, the measured three-dimensional deformation curve based on transponder is consistent with the real deformation curve, therefore verified the effectiveness of the proposed algorithm and the accuracy of measured three-dimensional deformation reached millimeter scale which coincided with the theoretical expectation.

  This research achievement was awarded the Excellent Paper Award of the Year in the Journal of IEEE Geoscience and Remote Sensing Association (GRSS)(TPPA: Transactions Prize Paper Award), and it lays a technical foundation for the practical application of this technology as well as provides a new idea and technology for the field of land disaster monitoring.

 

Paper links: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp="&arnumber=8353745

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