State-Space Models of Gravity Disturbance Gradients |
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Authors: | Jordan SK Moonan PJ Weiss JD |
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Institution: | Geospace Systems Corporation; |
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Abstract: | 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. |
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