According to ITU-R Rec. P.452-5 the median path loss between transmitter and receiver is given by the following equation:
(Eq. 216)
where:
is the basic loss in dB as function of the time percentage in %
is the frequency in GHz
is the distance in km
is the diffraction loss in dB as function of the time percentage in %
is the attenuation due to atmospheric gas and water in dB