An empirical comparison between absolute satellite positioning methods and differential methods in a maritime environment

Ola Ovstedal, Arne E. Ofstad, Kjell-Tore Haustveit and Oddgeir Kristiansen

Abstract:	The precise absolute (or point) positioning method determines coordinates in a global reference frame with high accuracy without simultaneous processing of data from points with known coordinates. In this approach accurate satellite orbit and clock parameters have been determined in a separate processing, by the International GPS Service (IGS), or any other organization, of data from a global network of stations. Except for this processing, the satellites carry all the information on the reference frame. In this paper the method of precise absolute positioning is applied to kinematic GPS observations from a seafloor mapping project in “Vesteraalfjorden” (68° N / 14° E). With the use of dual frequency observations from a state- of-the-art GPS receiver, the horizontal precision is approximately 0.2 m (95 %). A significant part of the project has been to develop a post processing software capable of precise absolute processing of kinematic GPS observations.
Published in:	Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002) September 24 - 27, 2002 Oregon Convention Center Portland, OR
Pages:	2679 - 2687
Cite this article:	Ovstedal, Ola, Ofstad, Arne E., Haustveit, Kjell-Tore, Kristiansen, Oddgeir, "An empirical comparison between absolute satellite positioning methods and differential methods in a maritime environment," Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002), Portland, OR, September 2002, pp. 2679-2687.
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