Modified method of geometric electromagnetics for the analysis of radio field in marine tropospheric waveguides

Interest in the practical use of tropospheric waveguides (TWG) above the sea surface remains high. This is because there are many new tools for remote sensing of the atmosphere boundary layer and efficient methods for calculation of radiowave fields. An efficient method for such calculations is the method of geometric electromagnetics (GE) based on the Brillouin concept. The authors discuss a modified GE method that enables a more complete account of TWG effects. The evaluation of frontier conditions by the "low wall" TWG above the Black Sea shows that radio waves with length about 10 cm experience almost specular reflection. The absolute value of the reflection coefficient is in the range of 0.87 to 0.95.