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Journal of University of Chinese Academy of Sciences ›› 2013, Vol. 30 ›› Issue (2): 228-232.DOI: 10.7523/j.issn.1002-1175.2013.02.013

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Antenna structural design based on phase center error analysis of airborne ATI-SAR

WANG Xin1,3,4, HONG Jun2,4   

  1. 1. Key Laboratory of Spatial Information Processing and Application System Technology, Chinese Academy of Sciences, Beijing 100190, China;
    2. China National Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    3. Graduate University, Chinese Academy of Sciences, Beijing 100190, China;
    4. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2012-03-06 Revised:2012-04-19 Online:2013-03-15
  • Supported by:

    Supported by NSFC(60890070)

Abstract:

Along-track interferometric synthetic aperture radar (ATI-SAR) detects ground moving objects and measures their velocities. Phase center error is a major error source of ATI-SAR. Not only does the constant offset need external calibration, but also the rigidity of antennas should prohibit the drifting errors. We analyzed the drifting errors caused by antenna's mechanical deformation and proposed requirements for structural design of antenna to meet the velocity measuring requirements, providing theoretical foundation for airborne ATI-SAR antenna structure design.

Key words: airborne ATI-SAR, phase center error, mechanical deformation, antenna system structural design

CLC Number: