LF/MF skywave propagation at daytime

Interference from the daytime skywave signal of one broadcasting station to the groundwave signal of a co-channel station located several hundred kilometers away has been observed in certain parts of the world. The need for a better of skywave propagation at daytime, the Radiocommunications Sector of the International Telecommunications Union (ITU-R, formerly known as the International Radio Consultative Committee, CCIR) adopted Question 215/3 at its 1993 Radio Assembly. This paper is in direct response to this Question. Daytime measurements of more than 30 paths are believed to be skywave and have been studied for detailed information of these paths. The purpose of this paper is twofold: to discuss daytime skywave propagation in a qualitative manner and to present a simple procedure for estimating daytime skywave field strength and interference levels.<
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