The a times R to the b relation in the calculation of rain attenuation
Abstract
The paper is concerned with the empirical relation A = a times R to the b, where A is the specific attenuation (or attenuation per unit distance), R is the rainrate, and a and b are frequencydependent parameters. Theoretical analysis shows that the relation is an approximation to a more general series relation in f and R, which reduces to the simpler form in the lowfrequency limit, as R approaches 0, or in the optical limit. A comprehensive and selfconsistent set of values for a and b is computed by applying logarithmic regression to Mie scattering calculations and is presented in both tabular and graphical form for the frequency range f = 11000 GHz. Empirical equations for some a(f) and b(f) curves are provided.
 Publication:

IEEE Transactions on Antennas and Propagation
 Pub Date:
 March 1978
 DOI:
 10.1109/TAP.1978.1141845
 Bibcode:
 1978ITAP...26..318O
 Keywords:

 Atmospheric Attenuation;
 Radio Attenuation;
 Rain;
 Asymptotic Methods;
 Drop Size;
 Microwave Attenuation;
 Mie Scattering;
 Particle Size Distribution;
 Regression Analysis;
 Temperature Effects;
 Thunderstorms;
 Communications and Radar