Diffraction of a radio-wave pulse in the ionosphere
The problem of the VHF radio-wave pulse propagation in the ionosphere is considered. The radio-wave pulse field estimation technique for paraxial region of far zone is developed on the basis of parabolic equation technique. The approach proposed takes into account the diffraction, the dispersion and the radio wave absorption. An analytical expression for the superwide-band radio-wave pulse field on the axis of parabolic antenna is obtained on the basis of the Green function technique. It is shown that the temp dependence of the field on the axis of parabolic antenna is determined by the derivative of an initial temporal pulse form, while for the one-dimensional problem solution this dependence is determined by an initial temporal pulse form.