DETERMINATION OF GRAVITY DATA SPACING REQUIRED FOR INERTIAL NAVIGATION

R. C. Anderson, J. A. Davenport, and C. Jekeli

Peer Reviewed

Abstract:	Many modern navigation systems use an inertial navigation system INS , often integrated with GPS. The largest uncompensated source of error in an INS is the unknown horizontal components of the gravity vector. Thus, it is critical to know where and at what spacing resolution additional gravity data should be collected to support INS operation to within specifications. This paper details a method for determining gravity spacing requirements. The technique is based on the total error variance equation of least-squares collocation and uses a Gaussian covariance function that is valid over the survey grid area. The resulting matrix equation is inverted symbolically and then solved for the gravity grid spacing.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 47, Number 1
Pages:	1 - 6
Cite this article:	Anderson, R. C., Davenport, J. A., Jekeli, C., "DETERMINATION OF GRAVITY DATA SPACING REQUIRED FOR INERTIAL NAVIGATION", NAVIGATION: Journal of The Institute of Navigation, Vol. 47, No. 1, Spring 2000, pp. 1-6.
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