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Antenna pointing equipment

  • US 5,184,139 A
  • Filed: 08/27/1991
  • Issued: 02/02/1993
  • Est. Priority Date: 08/29/1990
  • Status: Expired due to Term
First Claim
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1. An antenna pointing equipment for directing an antenna carried on a space navigation satellite to a target comprising:

  • pointing mechanism angle detecting means for detecting a pointing mechanism angle of said antenna;

    reference angle estimating means for estimating a theoretical reference angle of said antenna on the basis of orbital elements of said space navigation satellite and said target;

    error estimating means for obtaining an error of said theoretical reference angle from a difference between said pointing mechanism angle of said antenna detected by said pointing mechanism angle detecting means and said reference angle estimated by said reference angle estimating means;

    correcting means for correcting said reference angle on the basis of said error obtained by said error estimating means;

    acquisition control means for controlling the direction of said antenna on the basis of said reference angle corrected by said correcting means to acquire said target;

    pointing error detecting means for detecting a pointing error of said antenna relative to said target in a state in which said target is acquired by said acquisition control means; and

    tracking control means for controlling the direction of said antenna so as to correct said pointing error obtained by said pointing error detecting means to thereby track said target.

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