Geodetic Applications of Inertial Navigational Systems.
FAF UNIV AT MUNICH (GERMANY F R) INST OF ASTRONOMICAL AND PHYSICAL GEODESY
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A gradiometer-aided inertial navigation system is theoretically and statistically analysed to estimate its abilities to monitore geocentric cartesian coordinates. Having discussed the inertial instrumental units used on the moving platform and several reference coordinate frames applicable in all navigation systems, studies on the severe problem of the separability of the gravity gradients from the inertial disturbances are carried out. Simulation I presents how well the aided navigation system can produce inertial coordinates and how the newcomers of the inertial instrumentation, the gradiometers, perform on-board the moving vehicle. Quantization error studies are also analysed and presented for such a system. Simulation II includes besides the detailed analysis of the accelerometer and gradiometer error models used, the abilities of the system to estimate geocentric coordinates. Multipoint statistical analysis for the approximated inertial acceleration components shows that the navigation system under consideration behaves better as closer the reality is approached. Author