June 1959 | Other NBS Technical Note No. 12

Transmission Loss in Radio Propagation: II

Kenneth A. Norton


This Technical note was originally given limited distribution as NBS Report No. 5092, dated July 25, 1957. Since that time part of this report have been published in the following references:

(1) K. A. Norton, "Low and medium frequency radio propagation", Proc. of the International Congress on the Propagation of Radio Waves at Liege, Belgium, October, 1958, to be published by the Academic Press.

(2) K. A. Norton, "System loss in radio wave propagation", J. Research, NBS, _63D, pp. 53-73, July-August, 1959.

(3) K. A. Norton, "System loss in radio wave propagation", Letter to the Editor, Proc. I. R. E., to be published.

All of the material in reference (1) is included in this Technical Note. Some of the material in references (2) and (3) is new, particularly the definitions of the new terms "system loss" and "propagation loss". The transmission loss concept was adopted by the C. C. I. R. at its IXth Plenary Assembly in Los Angelos as is discussed more fully in reference (3) above.


In an earlier report with this title the concept of transmission loss was defined and its advantages explained. In this report a survey will be made of the transmission losses expected for a wide range of conditions, i.e., for distances from 10 to 10,000 statute miles; for radio frequencies from 10 kc to 100,000 Mc; for vertical or horizontal polarization; for ground waves, ionospheric waves, and tropospheric waves; over sea water or over land which may be either rough or smooth; and for various geographical and climatological regions.

Keywords: interference; radio propagation; transmission loss; radio noise

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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