1. B. R. Bean and E. J. Dutton, Radio Meteorology, National Bureau of Standards, Washingron, D.C. (1966).
2. M. A. Kolosov and L. B. Shabel’nikov, Refraction of Electronagnetic Waves in the Atmospheres of the Earth, Venus, and Mars [in Russian], Sovetskoye Radio, Moscow (1976).
3. J. Saastamoinen, Proc. Int. Symp. on the Use of Artificial Satellite, Washington (1972), p. 247.
4. S. Hopfield, J. Geophys. Res., 74, No. 18, 4487 (1969).
5. A. P. Naumov and M. B. Zinicheva, Radiotekh. Élektron., 25, 919 (1980).