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Air traffic surveillance and communication system

  • US 5,798,726 A
  • Filed: 01/24/1997
  • Issued: 08/25/1998
  • Est. Priority Date: 02/03/1995
  • Status: Expired due to Term
First Claim
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1. Air traffic surveillance and communication system for air traffic controllers, comprising:

  • a plurality of around based first digital radio transceiver means, each first digital radio transceiver means being located in specific geographic sectors, respectively, and having a first frequency channel for supporting party-line digital voice, and a second frequency channel dedicated to supporting a digital data channel for down-linking dependent surveillance data and for both up-link and down-link data communications, said first and second frequency channels being paired such that each time a frequency change is commanded by the ground both the first and second frequency channels will be automatically tuned to a new air-ground frequency pair,a plurality of aircraft based second digital radio transceiver means, one located in each aircraft, each second radio transceiver having corresponding first and second frequency channels, a navigational data source on each aircraft, said navigational data source including GPS receiver means for producing aircraft navigation data selected from aircraft latitude, longitude, altitude, speed, heading and glide, and means coupling said navigational data source to the respective aircraft transceiver for transmission on said second channel to at least one of said plurality of around based first radio transceiver means,each said ground based first radio transceiver means having a communication controller for formatting up-link data and separating down-linked surveillance data and disseminating same to air traffic controllers in the sectors of said aircraft wherein each said digital radio transceiver means includes means for causing said digital radio transceiver to operate with a 10 kHz spacing.

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