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US Patent 5627546 - Combined ground and satellite system for global aircraft surveillance guidance and navigation
US Patent Issued on May 6, 1997
Estimated Patent Expiration Date:
September 5, 2015Estimated 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.
Estimated Patent Expiration Date:
September 5, 2015Estimated 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.AbstractThe 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
| 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 equipmentField of Search342/32, Included in Secondary Surveilance Radar (SSR) or Air Traffic Control Radio Beacon System (ATCRBS)342/352, Including a satellite342/34, Ground control approach (GCA)342/49, With VOR/TACAN342/353, Having a signal repeater342/455, Having collision avoidance342/456Having traffic controlExaminersPrimary: Tarcza, Thomas H.Assistant: Phan, Dao US Patent References3678387, 4445118, Navigation system and methodIssued on: 04/24/1984 Inventor: Taylor , et al.4454510, Discrete address beacon, navigation and landing system (DABNLS) Issued on: 06/12/1984 Inventor: Crow4455651, Satellite communications system and apparatus Issued on: 06/19/1984 Inventor: Baran5099245, Vehicle location system accuracy enhancement for airborne vehicles Issued on: 03/24/1992 Inventor: Sagey5222099, Spread spectrum signal receiving apparatus Issued on: 06/22/1993 Inventor: Hori, et al.5311194, GPS precision approach and landing system for aircraft Issued on: 05/10/1994 Inventor: Brown5402442, Receiving device for receiving and demodulating spread spectrum-modulated GPS wave Issued on: 03/28/1995 Inventor: Ishigaki5467282GPS and satellite navigation system Issued on: 11/14/1995 Inventor: Dennis International ClassH04B 007/185 |
