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Detection system

  • US 5,504,486 A
  • Filed: 12/02/1993
  • Issued: 04/02/1996
  • Est. Priority Date: 12/02/1993
  • Status: Expired due to Fees
First Claim
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1. A method for detecting targets against a fixed background wherein each of said targets emits a gaseous exhaust plume, said method comprising the steps of:

  • directing electromagnetic energy at a fixed background in an area of suspected target activity;

    detecting reflected electromagnetic energy from said fixed background;

    identifying anomalous variations in range to selected points within said fixed background within said area which occur as a result of refraction of said electromagnetic energy passing through a gaseous exhaust plume; and

    identifying a probable target location utilizing said selected points within said fixed background within said area.

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