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Phase center measurement of electronic warfare antennas using GPS signals

  • US 6,967,615 B1
  • Filed: 04/02/2004
  • Issued: 11/22/2005
  • Est. Priority Date: 04/02/2004
  • Status: Expired due to Fees
First Claim
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1. The electronic warfare method of determining a location of a distant electromagnetic energy emitter with respect to an aircraft, an aircraft carrying a plurality of segregated electronic warfare antennas and receiving signals from said emitter via an extended emitter to aircraft path and said plurality of antennas, said method comprising the steps of:

  • determining an angle of arrival vector for signals received at said aircraft and said aircraft carried electronic warfare antennas from said distant electromagnetic energy emitter;

    said step of determining an angle of arrival vector including pre calibrating selected angle of arrival accuracy-determining dimensional and location characteristics of said plurality of electronic warfare antennas using known standard signals of compatible frequency with that of said distant electromagnetic energy emitter signals;

    said pre calibrating of selected angle of arrival accuracy-determining dimensional and locational characteristics of said plurality of electronic warfare antennas including calibration to a phase center location in each of said electronic warfare antennas; and

    deriving from said angle of arrival vector a range and angle vector connecting said distant electromagnetic energy emitter with a calibrated location of said electronic warfare antennas.

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