RECENT PROGRESS IN NAVIGATION SATELLITES

L. M. Keane

Peer Reviewed

Abstract:	LATEST STUDIES of navigation by satellite have emphasized the pa,ssive or one-way approach, i.e., designing the satellite system so that a user may navigate without the requirement for a transmitter on-board. Compared to a totally active or transponding system, this approach offers the advantages of increased numbers of potential users and increased resistance to interference. Independent measurements of position for North Atlantic ATC can be made simultaneously by incorporating transmitters in aircraft and relaying the position measurement data on ground command. The results of recent studies of hyperbolic ranging systems and long baseline interferometer approaches are presented. Spectrum occupancy, satellite power, lane ambiguities and computational procedures are discussed. Modes of operation which show promise for improving SST operation are described.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 15, Number 4
Pages:	415 - 423
Cite this article:	Keane, L. M., "RECENT PROGRESS IN NAVIGATION SATELLITES", NAVIGATION: Journal of The Institute of Navigation, Vol. 15, No. 4, Winter 1968-1969, pp. 415-423.
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