초록 ▼

A precision approach capable dual differential global positioning system (DGPS) receiver avionics system. The system of the present invention includes a first and a second DGPS receiver. The first and second DGPS receivers are both adapted to interface with an autopilot in an aircraft. The DGPS rece

A precision approach capable dual differential global positioning system (DGPS) receiver avionics system. The system of the present invention includes a first and a second DGPS receiver. The first and second DGPS receivers are both adapted to interface with an autopilot in an aircraft. The DGPS receivers each determine the position of the aircraft as the aircraft proceeds along a flight path. Both DGPS receivers are further adapted to employ carrier aiding to smooth the code phase measurements used in determining the position of the aircraft. Within a predetermined range along the approach path of the aircraft and when the output of the first DGPS receiver and the output of the second DGPS receiver are proximate within a predetermined distance, the DGPS receivers determine a transition point. After the transition point, the DGPS receivers utilize DGPS carrier phase tracking to determine the position of the aircraft relative to its position at the transition point. The low noise characteristics of the carrier phase tracking allows the DGPS receivers to properly interface with the autopilot of the aircraft.

대표청구항 ▼

[ We claim:] [1.] A precision approach capable dual differential global positioning system (DGPS) receiver avionics system, comprising:a first DGPS receiver adapted to interface with an autopilot of an aircraft, said first DGPS receiver adapted to employ carrier aiding to smooth code-phase pseudoran

[ We claim:] [1.] A precision approach capable dual differential global positioning system (DGPS) receiver avionics system, comprising:a first DGPS receiver adapted to interface with an autopilot of an aircraft, said first DGPS receiver adapted to employ carrier aiding to smooth code-phase pseudorange measurements to determine a first position;a second DGPS receiver adapted to interface with an autopilot of an aircraft, said second DGPS receiver adapted to employ carrier aiding to smooth code-phase pseudorange measurements to determine a second position;said first DGPS receiver and said second DGPS receiver adapted to determine a transition point, wherein said first position and said second position are proximate within a predetermined distance at said transition point and said transition point is located within a predetermined range on an approach path; andsaid first position and said second position set to an initial position after said transition point, said first DGPS receiver and said second DGPS receiver further adapted to utilize carrier phase tracking based upon said initial position, such that said first position and said second position remain proximate within said predetermined distance and such that said first DGPS receiver and said second DGPS receiver properly interface with said autopilot.