GPS Kinematic Positioning in AGMASCO Campaigns - Strategic Goals and Numerical Results

Guochang Xu, Ludger Timmen, Luisa Bastos

Abstract:	Within the AGMASCO (Airborne Geoid MApping System for Coastal Oceanography) project a two days initial test campaign and a ten days survey campaign were carried out in Germany, June 1996 and Denmark, September 1996, respectively. One main objective of these campaigns is static/kinematic GPS positioning for aerogravimetry. Multiple static GPS stations are used as reference stations and two airplane fixed GPS receivers with constant antenna distance were used for monitoring the kinematic movements of the airplane. To determine position, velocity and acceleration of the moving gravimeter at each sampling epoch, GPS kinematic data processing with high accuracy is required. The GFZ Kinematic/Static GPS Software KSGSoft and a commercial software were used for processing the data. In this presentation, accuracies (±1 cm and ±2 cm) of a 300 km and a 750 km static GPS network with repeatability tests of the static solutions will be given. Kinematic solutions using different static reference stations and multiple reference stations are compiled to show precision and accuracy. For survey area extensions of 150 km and 400 km, the kinematic positioning has a precision of ±1 cm and ±2-3 cm. Similar comparisons are also made for the kinematic velocity solutions (±0.3 cm/s). The derived distances of both airplane fixed antennas are checked in static and kinematic case, respectively. It reveals ambiguity problems and gives an additional assessment of consistency and precision in GPS positioning (solution module of multiple kinematic stations is used). Some GPS problems during flight monitoring in aerogravimetry will be shortly outlined.
Published in:	Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997) September 16 - 19, 1997 Kansas City, MO
Pages:	1173 - 1183
Cite this article:	Xu, Guochang, Timmen, Ludger, Bastos, Luisa, "GPS Kinematic Positioning in AGMASCO Campaigns - Strategic Goals and Numerical Results," Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997), Kansas City, MO, September 1997, pp. 1173-1183.
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