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Apparatus, method, and computer program product for generating terrain clearance floor envelopes about a selected runway

  • US 6,707,394 B2
  • Filed: 02/01/2000
  • Issued: 03/16/2004
  • Est. Priority Date: 02/01/1999
  • Status: Expired due to Term
First Claim
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1. An apparatus for generating a terrain clearance floor envelope for use in a ground proximity warning system that provides ground proximity alerts to an aircraft, wherein said apparatus comprises a processor that generates a terrain clearance floor envelope about a selected runway, wherein said processor defines the terrain clearance floor envelope dependent upon at least two boundaries, and wherein said processor defines at least one of the boundaries based on at least one of a runway position quality factor representing an uncertainty factor in the location of the selected runway and an altitude data quality factor representing an uncertainty factor in the altitude of the aircraft.

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