Читать книгу Global Navigation Satellite Systems, Inertial Navigation, and Integration - Mohinder S. Grewal - Страница 104

Because an INS operates in a world with gravitational accelerations it is unable to sense and unable to ignore, it must use a reasonably faithful model of gravity.

Gravity models for the Earth include centrifugal acceleration due to rotation of the Earth as well as true gravitational accelerations due to the mass distribution of the Earth, but they do not generally include oscillatory effects such as tidal variations.