Acceleration Determination Using Kinematic GPS Measurements

Joseph Czompo

Abstract:	In the frame of a research project on airborne gravimetxy, with the participation of the Department of Surveying Engineering at The University of Calgary and Sander Geophysics Limited, a preliminary ground-experiment was set up with the aim of evaluating the achievable GPS-derived tieration accuracy under realistic operational conditions, corresponding to scalar airborne gravimetry. The experiment is based on the so-called “Vertical Motion Machine” (WvlM), a vertically movable platform, which position is controlled and measured with high accuracy. A GPS antenna is mounted on the platfm. thus sensing the generated dynamic environment The VMh4 height encoder reading provides independent position reference. Different waveforms for the vertical position were generated, one of them k-playing” actual airplane acceleration proftle. The noise of the VMM position and the GPS position is compared in the spectral and in the time domain. The comparison proves that the VMM is capable of serving as reference. Different regions in the spectrum are identified by examining the GPS noise spectral distribution. The effect of different sampling rates of the GPS and VMh4 data is discussed. GPS acceleration is computed by numerical differentiation. The noise is reduced by digital filtering. The GPS acceleration error behaviour after 20 seconds and 1 minute filtering is presented.
Published in:	Proceedings of the 4th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1991) September 11 - 13, 1991 Albuquerque, NM
Pages:	897 - 902
Cite this article:	Czompo, Joseph, "Acceleration Determination Using Kinematic GPS Measurements," Proceedings of the 4th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1991), Albuquerque, NM, September 1991, pp. 897-902.
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