TY JOUR TI CHARACTERISTICS OF UHF WAVES DISTRIBUTION IN LAND AND WATER SURFACE TROPOSPHERIC WAVEGUIDE KW radio waves KW tropospheric waveguide KW cellular communication systems KW ultra-long propagation of radio waves KW height of a waveguide JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Kalambatskaya, O.. AU Pishchin, O.. PY 2019 IS PB Astrakhan State Technical University