1. V. P. Pashintsev, M. E. Solchatov, and R. P. Gakhov, Influence of the Ionosphere on Descriptions of Space Data Transmission Systems (Fizmatlit, Moscow, 2006) [in Russian].
2. E. L. Afraimovich and N. P. Perevalova, GPS Monitoring of the Upper Atmosphere of the Earth (GU NTs VSNTs SO RAMN, Irkutsk, 2006) [in Russian].
3. Ionospheric Radio Propagation, Ed. by K. Davies, (U.S. Government Printing Office, Washington, 1965; Mir, Moscow, 1973).
4. V. V. Dem’yanov, Yu. V. Yasyukevich, and S. Jin, Soln.-Zemnaya Fiz., No. 22, 35 (2013).
5. M. A. Kolosov, N. A. Armand, and O. I. Yakovlev, Propagation of Radio Waves in Space Communications (Svyaz’, Moscow, 1969) [in Russian].