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The Coast Guard's Differential GPS Programme

Published online by Cambridge University Press:  21 October 2009

D. H. Alsip ,
J. M. Butler  and
J. T. Radice
D. H. Alsip
Affiliation:
(United States Coast Guard)
J. M. Butler
Affiliation:
(United States Coast Guard)
J. T. Radice
Affiliation:
(United States Coast Guard)
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Abstract

The US Coast Guard has a project to provide a differential global positioning system service for harbour and harbour approach (HHA) areas of the coastal United States. The Great Lakes, Puerto Rico and most of Alaska and Hawaii will also be covered by the service. The Coast Guard's DGPS system will fulfil the 8–20 metre navigation accuracy requirement for HHA with an availability of up to 999 percent. The Coast Guard intends to provide this service to the general public and other government agencies, as well as use the system for its own missions. This capability is expected to enhance maritime safety in keeping with the National Transportation Policy by providing an all-weather radionavigation service to supplement existing radar and visual techniques, as well as a highly accurate position sensor for future electronic chart displays. This paper describes the Coast Guard's programme. Background and historical information on the development of pseudorange differential GPS is presented first, followed by a description of currently available technology. Various aspects of the Coast Guard's plan for implementing DGPS are then described, concluding with a rough project time line and a statement concerning Federal DGPS policy.

Keywords

Satellite systems.Marine navigation.Differential systems.
Type
Research Article
Information
The Journal of Navigation , Volume 46 , Issue 1 , January 1993 , pp. 78 - 94
Copyright
Copyright © The Royal Institute of Navigation 1993

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