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Synthetic aperture radar system and platform position measuring apparatus used in the same

  • US 6,208,283 B1
  • Filed: 06/28/1999
  • Issued: 03/27/2001
  • Est. Priority Date: 07/03/1998
  • Status: Expired due to Term
First Claim
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1. A synthetic aperture radar system fluctuation compensating apparatus comprising:

  • a synthetic aperture radar mounted on a flying unit;

    a data acquiring unit for acquiring reception data by said synthetic aperture radar;

    a position measuring unit for measuring a position of said flying unit to generate position data; and

    a position determining unit for determining a correct position of said flying unit based on said reception data and said position data to generate compensated position data, said position determining unit including;

    a compression processing unit for performing a range compressing process on said position data to generate range compression data;

    an extracting unit for extracting a reflection signal from said range compression data;

    an error calculating unit for performing an unlapping process and a smoothing process on said reflection signal in phase to generate an unlapped signal, and then calculating said range error based on said unlapped signal; and

    a position calculating unit for calculating said compensated position data indicative of a position of said flying unit from said range error.

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