ITU-R P.527-5 PDF

This Recommendation gives methods to model the electrical characteristics of the surface of the Earth, including pure water, sea water, ice, soil and vegetation cover, for frequencies up to 1 000 GHz, in a systematic manner based on the evaluation of complex relative permittivity. In all cases conductivity can be calculated as a function of frequency and temperature from these evaluations. Previous information on electrical characteristics below 30 MHz in terms of permittivity and conductivity is retained in the Attachment to Annex 1 in view of its association with Recommendations ITU-R P.368 and ITU-R P.832. The new modelling method is fully compatible with this earlier information.