DGPS via INMARSAT

Walter F. Blanchard

Abstract:	In a DGPS system it is essential that the data link matches GPS itself in reliability and availability, and can carry the data fast enough. Only links unaffected by anomalous propagation can do this; usually VHF links with only short ranges. To cover large areas satellite links must be used but they have not so far been generally used because of cost. NHL has developed a link that both meets the technical requirements and is not unduly expensive. It is capable of world-wide implementation and has been proved in extensive trials during the last two years. The paper describes how it works and gives some test results.
Published in:	Proceedings of the 3rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1990) September 19 - 21, 1990 The Broadmoor Hotel Colorado Spring, CO
Pages:	237 - 251
Cite this article:	Blanchard, Walter F., "DGPS via INMARSAT," Proceedings of the 3rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1990), Colorado Spring, CO, September 1990, pp. 237-251.
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