A. A. Khrustalev, V. Y. Koltzov, S. N. Egorov

Results of investigation of the flying vehicle for autonomous navigation system on base of mathematical modelling of surface and variation of navigation system parameters is obtained. The basic principle of autonomous navigation system building is method with three probe beams and correlated-extreme methods (CEM) of measuring results processing. CEM is realized with difference algorithms using the measured altitude elementwise difference calculating. This is provides the increase of navigation system performance.