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Individual Sky Wave Mode Loss Statistics Measured on a North–South Path
Author(s) -
Shepelavey Bohdan
Publication year - 1969
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs004i011p01029
Subject(s) - decile , statistics , mode (computer interface) , mathematics , path length , path loss , hop (telecommunications) , cumulative distribution function , statistical physics , physics , probability density function , optics , telecommunications , computer science , wireless , operating system
The HF propagation loss behavior, in general, and the observed losses over the north‐south path reported here, in particular, can be explained in terms of a deterministic and a random component. Thus, the results are presented as the cumulative distributions of loss by frequencies and by modes in terms of their median and decile values. The most significant aspect of these data and the accompanying statistics is that the propagation losses were observed and analyzed strictly on the individual mode basis. Among these propagation modes are included 2‐hop E , 1‐hop F 2 , 2‐hop F 2 , 2‐hop E 8 , and N. From the medians and the deciles of the loss distributions of these various modes, it is quite apparent that propagation losses are mode dependent, day and night dependent, and sometimes high‐ and low‐ray dependent. The E ‐mode losses also appear to be dependent on the ratio of the operating frequency and the maximum observed frequency of the path.