Vector gravimetry by a combination of inertial and GPS satellite measurements

Date
1990
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Abstract
Vector Gravimetry with inertial navigation systems has been successfully performed in semi-kinematic mode for several years. With advances in the kinematic use of GPS, also kinematic vector gravimetry has come within reach. The thesis deals with the problems of reducing the effects of INS sensor errors, determining the kinematic acceleration by means of GPS observations, and modelling the gravity vector in a state space setting. The requirements on INS and GPS observations are investigated in a covariance analysis. Different INS mechanizations, strapdown, platform, and rotating sensor unit, are compared. It is shown that only the last two are suited for vector gravimetry. Subject to the principal limitations of a simulation study, the quantitative results show that current INS and GPS hardware should allow the determination of deflections of the vertical with an accuracy of 1 arcsec. The determination of gravity anomalies with an accuracy of 10 ?ms-2, however, imposes very stringent requirements on the determination of the kinematic acceleration with GPS, which may possibly be met by high data rates and extensive filtering.
Description
Bibliography: p. 139-154.
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Citation
Knickmeyer, E. T. (1990). Vector gravimetry by a combination of inertial and GPS satellite measurements (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/15079
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