August 1978 | NTIA Technical Report TR-78-8

Estimates of the Atmospheric Transfer Function at SHF and EHF

Evan J. Dutton; Harold T. Dougherty


Known theory is applied to examine the channel transfer function for earth/space propagation paths through the atmosphere and over t he frequency range from 10 to 350 GHz. The associated attenuation and phase-delay characteristics are separated into the contributions of the clear-sky, clouds, and rainfall. From the available meteorological data, the total path attenuation and phase-delay is estimated over the frequency range from 10 to 45 GHz for selected values of the initial elevation angles from a ground station near Washington, DC.

The associated attenuation coefficients (dB/km) and phase-delay coefficients (rad/km) attributable to the clear air, clouds, and rainfall are also described for frequencies up to 350 GHz.

Keywords: atmospheric attenuation; atmospheric phase delay; microwave frequencies; millimeter waves; clear-air effects; effects of clouds; effects of rainfall

To request a reprint of this report, contact:

Lilli Segre, Publications Officer
Institute for Telecommunication Sciences
(303) 497-3572

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.

Back to Search Results