Relative guidance using the global positioning system

Aeronautics and astronautics – Missile stabilization or trajectory control – Remote control

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342 62, F41G 728

Patent

active

053441052

ABSTRACT:
A method for guiding a vehicle (30) to a target (28) includes furnishing a first vehicle (20) having a first global positioning system (GPS) receiver (24) fixed to receive global positioning signals from a selected constellation (46) of satellites in orbit above the earth and the second vehicle (30) having a second GPS receiver (32) fixed to receive global positioning signals from the same selected constellation (46) of GPS satellites. The first vehicle (20) locates the target (28) with an onboard sensor (26) and converts the location of the target (28) to the frame of reference of the selected constellation (46) of satellites of the GPS. The first vehicle (20) communicates this target position and the available set of GPS satellites to a navigation system of the second vehicle (30). The second vehicle (30) proceeds to the target location provided from the first vehicle (20 ) in the frame of reference of the GPS under control of its navigation system using the positioning signal derived from the second GPS receiver (32) fixed to receive positioning signals from the selected constellation (46) of satellites. In these operations, the second vehicle (30) remains within a sufficiently small operating distance of the position of the first vehicle (20) that variations in systematic bias errors between the first GPS receiver (24) and the second GPS receiver (32) are negligible.

REFERENCES:
patent: 4741245 (1988-05-01), Malone
patent: 4949089 (1990-08-01), Ruszkowski et al.
patent: 5131602 (1992-07-01), Linick

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