Positioning method utilizing artificial satellites in geosynchro

Details Positioning method utilizing artificial satellites in geosynchro Positioning method utilizing artificial satellites in geosynchro

1991-11-27

1992-11-03

Barron, Jr., Gilberto

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

G01S 512, H04B 7185

Patent

active

051609355

ABSTRACT:
A method of positioning an observation point utilizing artificial satellites. In order to make it possible to make a range measurement in areas within the latitude of 65 degrees where almost all people in the world reside, a predetermined first number of satellites, for example, ten satellites are placed in geosynchronous orbits, the inclination angle thereof being set to about six degrees. The respective satellites are placed so that the mean anomalies thereof are equally separated. A control station, which keeps track of a predetermined second number of satellites, monitors signals indicating times and frequencies generated from the satellites and compares the times and frequencies with national standard time and frequency obtained in a ground station, thereby enabling the position of the observation point to be determined. The control station frequently transmits commands for compensating clocks mounted in the satellites whereby each satellite generates a highly accurate signal for range measurement.

REFERENCES:
patent: 4918609 (1990-04-01), Yamawaki
patent: 4987420 (1991-01-01), Inamiya
patent: 5017926 (1991-05-01), Ames et al.
Milliken et al., "Principle of Operation of NAVSTAR and System Characteristics", Navigation: Journal of the Institute of Navigation, vol. 25, No. 2, Summer, '78.

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