Transfer alignment of platform inertial navigation in the inertial coordinate

Due to high speed rotation of the missile, the internal slave platform inertial navigation system cannot be torqued to track the geographical coordinate, so it is necessary to make the slave navigation platform track the inertial coordinate before the missile launch, while the master platform inertial navigation system still tracks the geographical coordinate. To solve the transfer alignment problem of the situation, this paper puts forward the corresponding solutions. the principle of the platform inertial navigation system which tracks the inertial coordinate is introduced firstly, then the transfer alignment methods in two kinds of inertial coordinate (the platform inertial coordinate and the geocentric inertial coordinate) are proposed. The simulation results show that the precision of the azimuth misalignment angle in the platform inertial coordinate is not preferable, however, the misalignment angle in the geocentric inertial coordinate achieves an accuracy of less than 1', which shows that it is a feasible method of alignment.