RECOMMENDATION ITU-R P.681-6 - Propagation data required for the design of Earth-space ... Annex 1 1 Introduction 2 Tropospheric effects 2.1 Attenuation 2.2 Scintillation 3 Ionospheric effects 4 Shadowing 4.1 Roadside tree-shadowing model 4.2 Roadside building-shadowing model 4.3 Special consideration of hand-held terminals (user blockage) 4.4 Modelling building blockage effects using street masking functions (MKF) 5 Multipath models for clear line-of-sight conditions 5.1 Multipath in a mountain environment 5.2 Multipath in a roadside tree environment 6 Statistical model for mixed propagation conditions 6.1 Prediction of fading statistics for a single satellite link 6.2 Prediction of state duration statistics for a single link 7 Satellite diversity 7.1 Uncorrelated case 7.2 Correlated case 7.3 Modelling satellite diversity effects using MKFs