Integrated terminal area surveillance system
Patent 4060805 Issued on November 29, 1977. Estimated Expiration Date: 
November 29, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 29, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3665464 3766552 3775767 3900846 InventorAssigneeApplicationNo. 05/700433 filed on 06/28/1976US Classes:342/38, With altitude information342/44, Unique identity342/455Having collision avoidanceExaminersPrimary: Tubbesing, T. H.Attorney, Agent or FirmAbstractAn integrated airport terminal area surveillance system, including a plurality of spaced apart interrogating and receiving stations and central equipment for controlling the stations operates in search and track modes by transmitting interrogation messages and receiving resulting replies. In the search mode the stations interrogate by directional beams all aircraft operating within the entire terminal area and enrolling the position and identification of replying aircraft into a system memory. In the track mode those aircraft enrolled in the system memory are individually interrogated. A system map is divided into memory cells corresponding to predetermined geographical cells. The means by which an aircraft is interrogated is determined by the geographical cell in which the aircraft is located. | |
