In allusion to solve the problem how to calculate the point of intersection between power range of radar and flight path in the three-dimensional space,on the base of air force visualization simulation production in existence,the relationship between power range of radar and flight path is studied, then the function expression for the power range of radar and the flight path equation which is based on the geographic coordinates are established. Meanwhile the parametric equation transform arithmetic is given, which converts the function expression and the flight path equation to the orthogonal coordinates and uses the numerical solution to solve the transcendental equations problem. Using Matlab to simulate and validate,the feasibility and validity is indicated.
