Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1995-08-11
1996-10-29
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
342408, 342424, 342156, H04B 7185, G01S 502
Patent
active
055700977
ABSTRACT:
A retransmitted Ground Positioning System (GPS) using retransmission of a GPS signal in combination with an interferometer for determining the angular deviations of an aircraft relative to a landing site in both vertical and horizontal planes, by using the accumulated phase of the GPS carrier signal. The system includes an aircraft and a landing site, wherein a first unit comprising one of the aircraft and the landing site includes a GPS retransmitter for retransmitting GPS signals to a second unit comprising the other of the aircraft and the landing site, which includes a GPS receiver/computer two spaced apart GPS antennas mounted on a rotating frame, the plane of rotation of which is normal to the landing strip. In a first general configuration, each GPS antenna in the interferometer comprises a GPS receiving antenna and a GPS transmitting antenna, and an amplifier connecting the GPS receiving antenna with the GPS transmitting antenna, and the aircraft includes a GPS receiver/computer. In a second general configuration, the landing site comprises an aircraft carrier, wherein the aircraft carrier includes two receive only GPS antennas, which are rotated in a plane perpendicular to the carrier deck, and a GPS receiver/computer. A single GPS retransmitting unit is mounted on the aircraft and comprises a GPS receiving antenna, a GPS transmitting antenna, and an amplifier connecting the GPS receiving antenna with the GPS transmitting antenna.
REFERENCES:
patent: 5359521 (1994-10-01), Kyrtsos et al.
patent: 5384574 (1995-01-01), Counselman, III
patent: 5438337 (1995-08-01), Aguado
patent: 5446465 (1995-08-01), Diefes et al.
Anderson Terry J.
Blum Theodore M.
Hoch Jr. Karl J.
Northrop Grumman Corporation
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