Combined ground and satellite system for global aircraft surveillance guidance and navigation
September 5, 2015. 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 3678387 Navigation system and method Discrete address beacon, navigation and landing system (DABNLS) Satellite communications system and apparatus Vehicle location system accuracy enhancement for airborne vehicles Spread spectrum signal receiving apparatus GPS precision approach and landing system for aircraft Receiving device for receiving and demodulating spread spectrum-modulated GPS wave GPS and satellite navigation system Patent #: 5467282 InventorApplicationNo. 523348 filed on 09/05/1995US Classes:342/352, Including a satellite342/32, Included in Secondary Surveilance Radar (SSR) or Air Traffic Control Radio Beacon System (ATCRBS)342/49, With VOR/TACAN342/353, Having a signal repeater342/456, Having traffic control701/120, Traffic analysis or control of aircraft701/218Using R-O (D.M.E. and path) or Tacan equipmentExaminersPrimary: Tarcza, Thomas H.Assistant: Phan, Dao International ClassH04B 007/185AbstractThe present invention provides a combined ground and satellite system for global aircraft surveillance, navigation, landing guidance and collision avoidance which comprises a satellite subsystem consisting of both a satellite constellation and associated ground stations, and a ground subsystem consisting of a network of ground stations, together with an airborne subsystem comprised of a transponder unit located in each of the aircraft using the system. A high speed two-way data link is provided between each of the subsystems using spread spectrum technology to permit overlaying and operation of the system in an existing band of narrow channels with minimum mutual interference. The system of the invention is reliable because of the redundant subsystems, and is not subject to failure. Also, the system provides for computations to be made on the ground, rather than in the aircraft, thereby reducing the size and complexity of the airborne equipment. The system also achieves a high degree of precision, as compared with the prior art systems. The system also provides air/ground data communication.Other References
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