Recommendation ITU-R P.618-14
Policy on Intellectual Property Right (IPR)
Annex 1
1 Introduction
2 Propagation loss
2.1 Attenuation due to atmospheric gases
2.2 Attenuation by precipitation and clouds
2.2.1 Prediction of attenuation statistics for an average
year
2.2.2 Seasonal variations – worst month
2.2.3 Variability in space and time of statistics
2.2.4 Site diversity
2.2.5 Characteristics of precipitation events
2.3 Clear-air effects
2.3.1 Decrease in antenna gain due to wave-front
incoherence
2.3.2 Beam spreading loss
2.4 Scintillation and multipath fading
2.4.1 Calculation of monthly and long-term statistics of
amplitude scintillations at elevation angles greater than 5 degrees
2.4.2 Calculation of the deep fading part of the
scintillation/multipath fading distribution of elevation angles less than 5°
2.4.3 Calculation of the shallow fading part of the
scintillation/multipath fading distribution at elevation angles less than 5°
2.5 Estimation of total attenuation due to multiple sources of
simultaneously occurring atmospheric attenuation
2.6 Attenuation by sand and dust storms
3 Noise temperature
4 Cross-polarization effects
4.1 Calculation of long-term statistics of hydrometeor-induced
cross-polarization
4.2 Joint statistics of XPD and attenuation
4.3 Long-term frequency and polarization scaling of statistics of
hydrometeor-induced cross‑polarization
4.4 Data relevant to cross-polarization cancellation
5 Propagation delays
6 Bandwidth limitations
7 Angle of arrival
8 Calculation of long-term statistics for non-GSO paths