GPS precision approach and landing system for aircraft
September 15, 2012. 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 ReferencesSatellite-based vehicle position determining system Method for positioning moving vehicles and exchanging communications between the vehicles and a central station Navigation system for automotive vehicle including feature of updating vehicle position at selected points along preset course Vehicle monitoring arrangement and system Road navigation system Advanced instrument landing system Landing assistance system using navigation satellites Tracking system System and method for monitoring and reporting out-of-route mileage for long haul trucks Patent #: 5068656 InventorApplicationNo. 945300 filed on 09/15/1992US Classes:342/357.06, Using Global Positioning Satellite (GPS or Glonass)342/357.03, Using differential correction342/410Glide slope transmitter or receiverExaminersPrimary: Blum, Theodore M.Attorney, Agent or FirmForeign Patent References
International ClassesH04B 007/185G01S 005/02 AbstractA GPS precision approach and landing system for aircraft employs a fixed ground facility and a single satellite navigation receiver on board the aircraft. The fixed ground facility includes a reference receiver that measures differential corrections to the satellite code and carrier measurements and a pseudolite that is employed to transmit these corrections to a broadband GPS receiver on board the aircraft and to provide an additional code and carrier measurement to assist in the navigation solution. The pseudolite signal is broadcast at a frequency offset from the L1 GPS frequency in order to prevent interference with the satellite navigation system. The broadband GPS receiver on board the aircraft is capable of making phase coherent measurements from the GPS satellites, the pseudolite signal, and the GLONASS satellites. These phase coherent measurements are combined to form a precise differential carrier ranging (DCR) solution that is used to provide three-dimensional position guidance of the aircraft throughout a precision approach and landing procedure.Other References
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