In order to improve reliability and accuracy of impact point positioning in the last stage of missile range, a fusion positioning method of measurement data is presented in this paper.

In this paper, the feasibility of impact point positioning based on single phototheodolite is analyzed firstly, then the underlying principle and practical computing algorithm are presented correspondingly.

A series of landing information of helicopter, include weather influence, pilot influence, ship movement influence and so on, were reflected by landing position.

At present, the landing position of helicopter is measured by the method of eye-measurement, which has a low precision and a bad measurement environment.

Some conceptions involved in the collimator method are introduced and the point displacement and figure deformation are deduced in theory.

Three solution metbods for node displacement of tension and pressure member system in material mechanics were presented and compared.

By using this relations,we can calculate node displacement of the statically indeterminate structure of bar system and to build compatibility equation of deformation of the statically indeterminate structure of bar system which possesses conventional and general features,to avoid painting di.