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Determining transmit location of an emitter using a single geostationary satellite

  • US 8,462,044 B1
  • Filed: 01/26/2011
  • Issued: 06/11/2013
  • Est. Priority Date: 04/21/2010
  • Status: Active Grant
First Claim
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1. A method of determining the transmit location of an emitter using a single geostationary satellite, the method comprising:

  • receiving a signal from the emitter and relayed by the geostationary satellite, the signal being received at a ground station at first and second time instances;

    determining a first line of position based on a first difference in frequency for the received signal between the first and second time instances;

    receiving the signal from the emitter and relayed by the geostationary satellite, the signal being received at the ground station at third and fourth time instances;

    determining a second line of position based on a second difference in frequency for the received signal between the third and fourth time instances; and

    determining the transmit location of the emitter based on the first line of position and the second line of position.

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