Title :
Status of marine high-precision GPS navigation system
Author :
Welshe, Robert G. ; Wong, Richard V C ; Rochester, Dennis L. ; Fischer, Robert E.
Author_Institution :
Western Geophys. Co., Houston, TX, USA
Abstract :
Western Geophysical has been developing a proprietary high-precision differential GPS (Global Positioning System) marine navigation system with the goal of providing submeter real-time positioning of a marine seismic survey vessel located up to 1000 km from a land-based reference station. The system measures L1 and L2 group delay observables without knowledge of the P code and uses them to derive the ionospheric corrections. Various land-based tests have been run on a prototype system, demonstrating the capability of obtaining real-time accuracies of 1 m and post-fit submeter absolute accuracies at distances up to 650 km, with average errors consistently less than 0.5 m. Results of the tests are reported
Keywords :
electronic equipment testing; marine systems; radionavigation; satellite relay systems; seismology; surveying; 1000 km; 650 km; GPS navigation system; Global Positioning System; Western Geophysical; average errors; group delay observables; high-precision differential GPS; ionospheric corrections; land-based reference station; land-based tests; marine navigation system; marine seismic survey vessel; real-time accuracies; real-time positioning; Delay estimation; Dual band; Geophysical measurements; Global Positioning System; Kinematics; Marine navigation; Phase measurement; Prototypes; Real time systems; System testing;
Conference_Titel :
Position Location and Navigation Symposium, 1992. Record. 500 Years After Columbus - Navigation Challenges of Tomorrow. IEEE PLANS '92., IEEE
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-0468-3
DOI :
10.1109/PLANS.1992.185873
