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Method and apparatus for sensing and displaying targets within a preset zone

  • US 4,777,489 A
  • Filed: 12/23/1985
  • Issued: 10/11/1988
  • Est. Priority Date: 12/27/1984
  • Status: Expired due to Fees
First Claim
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1. A method of sensing radar-detected targets within a preset guard zone comprising the steps of:

  • providing information representing the preset guard zone;

    storing pixel elements, representing radar echo signals, in a frame store having multiple addressable storage locations;

    reading out of said frame store the contents of at least selected ones of the addressable storage locations within said guard zone;

    detecting pixel elements of pre-established value stored in the read out selected storage locations;

    verifying that at least one of said detected pixel elements of pre-established value is a target pixel element; and

    indicating the presence of a target within said preset guard zone when at least one of the detected pixel elements read out from said selected storage locations is verified as a target pixel element.

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