Statistics of a radio wave diffracted by a random ionosphere

For some purposes, partic ul arly in connection with the study of the random structure of t he lower ionosphere, usin g very low fr equencies, i t is necessary to find t he detail ed statistical proper ties of a r a ndom s ignal diffracting in free sp ace. Mathe matical too ls for evaluatin g these parameters have bee n developed, and are applied in th is p aper. All owance is made for t he effcet of spheri city of t he wave incident on the ionosphere, a nd anisotropy of the irregular variations of signal is permitted . The case of oblique incidence of a wave on t he ionosphere is also considered.