Testing a Lightweight GPS/GIS Terminal for Sub-Meter DGPS Positioning

M. Elizabeth Cannon, Edward Berry and Michael King

Abstract:	The use of GPS for georeferencing is an expanding area with many users currently requiring positional accuracies at the sub-meter level. This paper focuses on testing the Motorola LGT 1000TM GPS receiver on various baseline separations to assess its achievable accuracy in post-processing mode. This receiver is a standard 6 channel Motorola PVT6 core C/A code unit with custom user interfaces and software specifically designed for GIS data acquisition. It also measures and outputs the GPS carrier phase observable which is required to reach sub-meter accuracies using standard C/A code technology. A series of post-processed DGPS tests were carried out with this system on baselines ranging from a few meters to about 100 km. Data was processed using The University of Calgary’s SEMIKINrM program in order to establish accuracy as a function of baseline separation and site occupation time. A description of the system as well as the tests are given. Results achieved for the various scenarios are discussed and conclusions regarding the use of such a system for sub-meter georeferencing are made.
Published in:	Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993) September 22 - 24, 1993 Salt Palace Convention Center Salt Lake City, UT
Pages:	1011 - 1020
Cite this article:	Cannon, M. Elizabeth, Berry, Edward, King, Michael, "Testing a Lightweight GPS/GIS Terminal for Sub-Meter DGPS Positioning," Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993), Salt Lake City, UT, September 1993, pp. 1011-1020.
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