Development of wide range propagation model

The  aim of the study, a major two-year project, was to develop a unified propagation model for the prediction of signal levels on terrestrial paths in a frequency range of approximately 30MHz–50GHz, considering both availability and interference, which covers times from 0–100%. The work required a fundamental re-evaluation of the statistical relationship between different propagation mechanisms. The eventual model was contributed to ITU-R SG3 and is now adopted as Recommendation P.2001.