Abstract: In this paper, a method of determining the ground distance of the separate scattering sources from the HFbackscatter ionogram is given. It is assumed that the scattering traces of the source are in a parabola which is tangential to the minimum time-delay curve, the ground distance of a separate fixed scatterer can be calculated. It is based on the data of the minimum time delay curve and three pairs of the data of group path and frequency of the traces in the backscatter ionogram of a single backscatter sounding station. The results of the experimental test indicated that the errors of the results calculated with the method presented here are not more than 3%.