The work describes briefly the application of the complete solution oí the basic equations of meteoric physics, found in connection with solving the problems of photographic meteor theory, to the construction of theoretical Fresnel characteristics. It is shown how the meteoroid deceleration can be incorporated into concepts of radar physics. The corresponding equations are derived and the possibility of using these Fresnel characteristics for the evaluation of the ablation parameter^and the pre-atmospheric velocity v^ from the registered amplitudes is briefly discussed.