Radio pulse propagation by a reflection process at the lower ionosphere

The groundwa ve pu lse has bee n co nsidered i n detail by Johler [1962, 1963b].A t heor y was presented as a d irect numer ical an d analytic evaluation ot the Fourier transform integ ral.S uch a t heor y can be extended to treat pulsed ionospheric waves.The r efl ection process for va rious model a ni storopic io nospheres has been studied in detail in p revious pap ers by Johle r [1962] .The a na lysis of the reflec tion coefficient t hus de monstrated is e mployed to co nst ruct tran sfer fun ctions for the ionosp heri c wave.These t ra nsfer fun ction s a re t hen introduced into the Fo ur ier tran sform of the pulse, a nd the behav ior of LF pulses propagated by a refl ection process at t he ionosphe re is determined for t hree m od els for the lower ionosphere.The co mposite ground a nd io nospheri c pulse is for med , a nd a met hod of tagging a po int-in.time on the pulse is d etai led.