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State-Space Models of Gravity Disturbance Gradients

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3 Author(s)
Jordan, S.K. ; Geospace Systems Corporation ; Moonan, P.J. ; Weiss, J.D.

State-space models of gravity disturbance gradients are needed to design the Kalman filters used for gradiometer-aided inertial navigation. However, the physics of the gravity field guarantee that many of the cross-spectral densities of gravity disturbance gradients are nonrational. A procedure is demonstrated for fitting gravity disturbance correlation functions with finite-dimensional state-space models.

Published in:

Aerospace and Electronic Systems, IEEE Transactions on  (Volume:AES-17 ,  Issue: 5 )