Precise Velocity Estimation Using a Stand-Alone GPS Receiver

Frank van Graas and Andrey Soloviev

Peer Reviewed

Abstract:	Stand-alone GPS receiver velocity algorithms and flight test results are presented. A dual-frequency GPS receiver was subjected to aircraft dynamics of up to 1 g (9.8 m/s2), with aircraft bank angles of up to 45 deg. Velocity errors were determined for static and in-flight conditions. In-flight results were evaluated against a postprocessed, differential kinematic GPS solution and by an assessment of the velocity estimation residuals. Differences between the stand-alone velocity solution and the postprocessed differential velocity solution were found to be at the 2–4 mm/s level (1 ) for horizontal velocity components and 9.7 mm/s (1 ) for vertical velocity. Since these differences include noise contributions from three GPS receivers, stand-alone velocity errors are expected to be smaller than the results reported here. This is also indicated by the stand-alone velocity residual biases, which were found to be on the order of 0.1 mm/s or less, while residual standard deviations ranged from 0.8 to 3.2 mm/s.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 51, Number 4
Pages:	283 - 292
Cite this article:	van Graas, Frank, Soloviev, Andrey, "Precise Velocity Estimation Using a Stand-Alone GPS Receiver", NAVIGATION: Journal of The Institute of Navigation, Vol. 51, No. 4, Winter 2004-2005, pp. 283-292.
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