Development and Implementation of a Centimeter-Accurate Real-Time-Kinematic Positioning System

Herbert Landau, Christian Pagels, and Ulrich Vollath

Abstract:	There is no doubt that in the future centimeter- accurate GPS positioning systems will be real-time rather than post-processing systems. Processing algorithms providing these accuracies have been successfully implemented for years. The challenge today is to develop algorithms capable of working in real-time providing sufficient update rates on reasonable processors. Real-time systems are of interest for different application areas like static surveying, stop&go and on-the-fly positioning. Implementations for the specific applications are presented focusing on the different ambiguity resolution techniques to apply. The paper discusses the problematic areas with respect to processing speed in such a RTK system like ambiguity initialization, tropospheric modeling, ephemeris computation. Special emphasis is also made on the discussion of Selective Availability aspects related to latency problems in the radio link. Setting out is a special problem to be considered with respect to the man-machine interface. First it is necessary to provide sufficient updates for a convenient use. Second the position prediction in this mode has to provide a smooth and reliable user guidance. Besides the system development aspects the paper presents the real implementation into a survey system and results of system tests, too.
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:	1485 - 1491
Cite this article:	Landau, Herbert, Pagels, Christian, Vollath, Ulrich, "Development and Implementation of a Centimeter-Accurate Real-Time-Kinematic Positioning System," 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. 1485-1491.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In