ONE-WAY RADIO RANGE MEASUREMENTS FOR SURVEYING AND NAVIGATION

Dr. H. C. Freiesleben

Peer Reviewed

Abstract:	Atomic clocks did reach a perfection during the last years that it becomes likely to have position fixing by such clocks in the near future. Theoretically this was proposed sometimes in the past decades. Now we have two systems used for navigational purposes, the McDonnel Collision Avoidance System, well known to air navigation experts, using crystal clocks, and a geophusical surveying system, ANA, *developed by the "Gesellschaft fur praktische Lagerstattenforschung", Hannover, using Rubidium atomic clocks. Two ground statiions are equipped with such clocks, a third is installed in an aircraft for time comparison wiht the ground-based clocks. The difficulty to use the mentioned systems over longer periods as it would be necesary for maritime use, consists in the synchronization. These exist some proposals, till now not reaisitc and rather complicated, which would render possible to extend both methods to a general use for aircraft and ships. The further development of atomic clocks seems to be very promising.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 17, Number 1
Pages:	20 - 23
Cite this article:	Freiesleben, Dr. H. C., "ONE-WAY RADIO RANGE MEASUREMENTS FOR SURVEYING AND NAVIGATION", NAVIGATION: Journal of The Institute of Navigation, Vol. 17, No. 1, Spring 1970, pp. 20-23.
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