INTENDED to provide highly accurate three-dimensional position and velocity and precise time on a continual global basis, the NAVSTAR Global Positioning System (GPS) has been under development by the US Department of Defence since the early 1970's. It is a satellite based radio navigation system which, when it comes into operation in 1988, will consist of 18 satellites in six orbital planes inclined at 55°. Each plane will contain three satellites spaced 120° apart in 12 hour orbits, the relative phasing of the satellites from one plane to the next being 40°.
Satellite Based Navigation
Aircraft Engineering and Aerospace Technology ; 57 , 10 ; 6-15
1985-10-01
10 pages
Article (Journal)
Electronic Resource
English
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