GPS Accuracy Test for Airborne Gravimetry

Joseph Czompo

Abstract:	The paper assesses the GPS performance for airborne gravimetry applications using results of a test conducted in the Lake Ontario area. The airborne test configuration consisted of a GPS receiver. au inertial system (INS), a laser altimeter and a gravimeter. mounted in a Cessna 402- B airplane. A GPS receiver on the ground was used for GPS differential processing. The measured lake surface, derived from the GPS-determined trajectory and the INS- rectified laser ranges, were compared to the lake height above the ellipsoid using the orthometric lake height and the best geoid model available in that area. The agreement between the measured and the model lake surface proved to be a good indicator of the GPS error behaviour. The GPS error characteristics and other error sources, their magnitude and their possible effects on gravimetry are discussed. The “inverse” problem, airborne altimetry, where a good GPS solution is assumed and the geoid is to be determined, is also discussed.
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:	805 - 810
Cite this article:	Czompo, Joseph, "GPS Accuracy Test for Airborne Gravimetry," 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. 805-810.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In