itu838.rst

Recommendation ITU-R P.838

This Recommendation provides a method to compute the specific attenuation for rain for use in prediction methods.

Introduction

The specific attenuation γ_R (dB/km) is obtained from the rain rate R : math: (mm/h) using the power-law relationship:

γ_R = kR^α

Values for the coefficients k and α are determined as functions of frequency, f (GHz), and this recommendation provides value valid in the range from 1 to 1 000 GHz. The models from Recommendation ITU-R P.838 have been developed from curve-fitting to power-law coefficients derived from scattering calculations:

Module description

itur.models.itu838