HIGH ACCURACY OFF-SHORE POSITION FINDING USING THE GEOLE SATELLITE BASED SYSTEM
Market studies conducted in 1971 and 1974 show that the number of potential users for high-precision position-fixing systems (i.e. ones offering an open sea accuracy of 100 to 200 m) was limited. The total number of ships requiring such services in the early 1990's can be estimated at 400. These ships will be highly specialized and well equipped; on board equipment will clearly include sophisticated dead reckoning systems (Doppler sonar, inertial unit, etc.) and computers. The GEOLE was designed as a means of periodically updating dead reckoning calculations performed onboard ships. To provide updating every 2 hours would require 4 satellites, each weighing 250 kg. These would be placed in orbits at an altitude of 1500 km inclined at 75 deg to the equator, with the four ascending nodes separated from one another by 45 deg of longitude.
Centre National d'Etudes Spatiales18 avenue Edouard-Belin
31000 Toulouse, France
- Husson, J C
- Saint-Etienne, J
- Publication Date: 1977-4
- Pagination: 16 p.
- TRT Terms: Accuracy; Location; Minerals; Navigational satellites; Ocean bottom; Oceanography; Oil exploration; Position fixing; Satellite navigation systems; Ships; Sonar
- Old TRIS Terms: Geole satellites; Position finding
- Subject Areas: Marine Transportation; Operations and Traffic Management; Vehicles and Equipment;
- Accession Number: 00191994
- Record Type: Publication
- Source Agency: National Technical Information Service
- Files: TRIS
- Created Date: Jul 11 1979 12:00AM