“…If the r eceiYer and/or trn,n smittel' are elevated, the integrand of I j is multiplied by G,_Y, (klr)G. _y, (kl b), where N ow, the effect of the earth's magnetic field is consider ed. Assuming that o~ = 0, and t he ionospher e is locally plan ar, (26) where (27) The planar anisotropic ionospheric reflection coefficients Tee, T em, Tme, and T mm [Johler and Walters, 1960] correspond to IIR II , IIR J.., J..R II , and J.. RJ.., respectiYely, in the notation of Wait [1962] and others. Explicit expressions [or the T's are given by Johler and Berry [1964].…”