You searched for: “ionospheric propagation
ionospheric propagation
1. The transmission of electromagnetic waves of frequencies up to 25 megahertz over great distances, by ionospheric reflection.
2. Propagation of radio waves over long distances by reflection from the ionosphere, useful at frequencies up to about 25 megahertz.
This entry is located in the following units: ion, ion- + (page 9) sphero-, spher-, -sphere- (page 9)