Abstract: In this paper, a method to determine the radial track of a moving object in HFbackscat-ter study is given. In the method, the minimum time delay curve, the time delay of the signal and the Doppler frequency shift of the moving object are sufficient. There is no need to know the ionospheric characteristics of the middle point. Acomparison of the calculated data with experiments is discussed and the possible application of the method is also presented.