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Initial alignment is one of the key technologies of Strap down Inertial Navigation System (SINS). The accuracy of initial alignment directly affect the accuracy of the work of SINS and the time of initial alignment are important tactical targets reflecting the rapid reaction capability of weapons systems. In this paper, the development and method of SINS initial alignment technology are reviewed from three aspects which include coarse alignment, fine alignment and transfer alignment.

Overview of Initial Alignment Method for Strap down Inertial Navigation System