An improved model for earth-space microwave attenuation distribution prediction
Article first published online: 7 DEC 2012
This paper is not subject to U.S. copyright. Published in 1982 by the American Geophysical Union.
Volume 17, Issue 6, pages 1360–1370, November-December 1982
How to Cite
1982), An improved model for earth-space microwave attenuation distribution prediction, Radio Sci., 17(6), 1360–1370, doi:10.1029/RS017i006p01360., , and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 23 JUN 1982
- Manuscript Received: 31 MAR 1982
The Dutton-Dougherty (DD) model for predicting microwave attenuation distribution on an annual basis on earth-space telecommunications links was first developed at the Institute for Telecommunication Sciences in 1973. The version for making predictions throughout the United States, with year-to-year variability allowance, was developed in 1977 and had been essentially unmodified until the present improvement efforts were undertaken. The refinements of the Dutton-Dougherty model discussed in this paper include an extension of the attenuation distribution prediction range to 0.001% of a year, whereas it had previously extended only to 0.01% of a year. This extension is accomplished in two alternative ways: empirically and analytically. Both extension procedures give nearly identical prediction results. An analysis is conducted of the pertinency of ‘effective path length’ models for evaluating rain attenuation at microwave frequencies to the DD model. It is determined that whereas effective path length methodologies may be useful in their own right, it would be difficult and unwieldy to incorporate this concept into the DD model, at present.