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SYSTEMS AND METHODS FOR PERFORMING HIGH ACCURATE DISTANCE MEASURING FOR RADAR ALTIMETERS

  • US 20060089759A1
  • Filed: 02/11/2005
  • Published: 04/27/2006
  • Est. Priority Date: 10/22/2004
  • Status: Abandoned Application
First Claim
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1. A method performed on an aircraft, the method comprising:

  • simultaneously transmitting a signal having different two or more modulating frequencies;

    receiving returns of the signal with two modulating frequencies;

    determining the phase of the return of the first modulating signal;

    determining the phase of the returned second modulating signal; and

    determining a distance value based on the determined phase of the first and second return modulating signals.

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