GPS MAPS BY ETHAN HARGARTHER. HISTORY OF GPS & SATELLITE NAVIGATION Sputnik 1 launched in 1957 by the USSR Learned by manipulating satellite orbit that. - ppt download
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An Expurgated History of the GPS Revolution on the occasion of the 50th anniversary of its initial approval in December of 1973" By Bradford Parkinson - (There at the beginning), 63rd CGSIC
GPS HISTORY | PPT
The history and science behind GPS - British Sub-Aqua Club