ION Technical Content
Floating Differential GPS (FDGPS)
| Abstract: | The subject of this paper is the control and tracking of vehicles that are Over The Horizon (OTH) and maintain positional accuracies of less than 8 meters by using a floating differential GPS “All-in-view” Reference Receivers. Various existing methods that are in different stages of development/implementation that can solve part of the problem are the Extended Differential GPS, Coast Guard Harbor control, Wide Area Differential GPS (WDGPS) and Radio Data System(RDS). They all use networks of differential and/or monitor stations and FM radio station subcarriers to augment the differential solutions and require monitor and/or ground network stations to function properly. The situation that will be discussed in this paper involves remotely controlled vehicles all OTH with no terrestrial base station Line of Site (LOS). The vehicles can be air, ground, sea vehicles or combinations of each. The remote vehicles of course must be controlled and tracked from a Master Ground Station (MGS) and the Vehicle Control Commands and Time Space Position Information (TSPI) must be passed (datalinked) to and from the vehicles under control. It is defined, for this paper, that all OTH vehicles fall into the category of there is no LOS between the OTH vehicle and the MGS. This could be a vehicle hundreds of nautical miles from the MGS at some altitude or it could be a vehicle in close proximity of the MGS, but because of the terrain no LOS is possible. In both situations, the OTH vehicle will need a relay to transmit and receive the appropriate differential and trajectory control information. This is illustrated in Figure 1. |
| Published in: |
Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995) September 12 - 15, 1995 Palm Springs, CA |
| Pages: | 481 - 490 |
| Cite this article: | Brown, James L., "Floating Differential GPS (FDGPS)," Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995), Palm Springs, CA, September 1995, pp. 481-490. |
| Full Paper: |
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