Abstract: For there are manufacture and installation error and transmutation of the launcher， the setting accuracy of the initial course and attitude will be affected by the course and attitude error between the relative azimuth reference of locating rail and the reference plane. A new method is presented for the accuracy measurement of locating rail of missile-in-container. The course and attitude test system with high accuracy is used for data acquisition, and the accuracy of locating rail is calculated through offline computed processing. It can help accomplish the accuracy measurement of the rail with moving base, and the initial setting of course and attitude can be compensated with the tested state parameter. So the setting accuracy of the initial course and attitude can be improved.

Key words: Moving base, Locating rail accuracy, Measurement