Читать книгу Global Navigation Satellite Systems, Inertial Navigation, and Integration - Mohinder S. Grewal - Страница 146

The essential performance metric for any navigation system is accuracy, commonly specified in terms of position accuracy. However, because inertial navigation also provides attitude and velocity information, those may also be factors in performance assessments. In the case of integrated GNSS/INS systems, there may be an additional performance metric related to how fast navigational accuracy degrades when GNSS signal reception is lost. INS‐only navigation is called free inertia navigation, and we will start there. Integrated GNSS/INS performance is addressed in Chapter 12.