(a) Graphical representation of the radio signal forward-scattered by a meteor trail. The optical path of the reflection is specular. Reflections of the emitted signal from other segments of the trail can result in diffraction patterns, which are accounted in Eq. (31) by the Fresnel integrals. (b) Two hypothetical detection points for Condition 1 and 2. The transmitter in Dourbes, Belgium emits a continuous radio wave at a frequency of 49.97 MHz and constant power of 150 W. The reflected signal is received by the radio station in Overpelt, Belgium. The ellipse defines the wave propagation plane, and the two entry trajectories are tangential to the ellipse at the reflection points. Moreover, we assume that the trajectories lie in the plane of propagation of the wave, having set β = 0 deg.