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Carrier phase-based relative positioning apparatus

  • US 6,611,228 B2
  • Filed: 07/24/2001
  • Issued: 08/26/2003
  • Est. Priority Date: 07/24/2000
  • Status: Active Grant
First Claim
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1. A carrier phase-based relative positioning apparatus comprising:

  • a plurality of antennas of which at least one is installed on a mobile unit;

    means for determining the relative positions of the multiple antennas by receiving radio signals transmitted from a plurality of position-fixing satellites with the multiple antennas, observing a single phase difference or a double phase difference, and calculating an integer ambiguity of the single phase difference or the double phase difference; and

    means for judging whether the integer ambiguity has been correctly determined based on whether the relative positions of the antennas fall in a preset range in which the relative positions will fall under normal conditions.

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