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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: Icon_subject 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.
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Abstract

The 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

  • Paper -Robert P. Crow -"Integrated Global Surveillance and Navigation System" -presented to Institute of Navigation Convention (Jun. 4, 1994) -(copy attached

Inventor

Application

No. 523348 filed on 09/05/1995

US 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 equipment

Field of Search

342/32, 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 control

Examiners

Primary: Tarcza, Thomas H.
Assistant: Phan, Dao

US Patent References

3678387, 4445118, Navigation system and method
Issued on: 04/24/1984
Inventor: Taylor ,   et al.
4454510, Discrete address beacon, navigation and landing system (DABNLS)
Issued on: 06/12/1984
Inventor: Crow
4455651, Satellite communications system and apparatus
Issued on: 06/19/1984
Inventor: Baran
5099245, Vehicle location system accuracy enhancement for airborne vehicles
Issued on: 03/24/1992
Inventor: Sagey
5222099, 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: Brown
5402442, Receiving device for receiving and demodulating spread spectrum-modulated GPS wave
Issued on: 03/28/1995
Inventor: Ishigaki
5467282GPS and satellite navigation system
Issued on: 11/14/1995
Inventor: Dennis

International Class

H04B 007/185

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