CONTENTS

Recommendation ITU-R P.1812-8
Policy on Intellectual Property Right (IPR)
Annex
 1 Introduction
 2 Model elements of the propagation prediction method
 3 Input parameters
        3.1 Basic input data
        3.2 Radio path profile
                  3.2.1 Terrain and ground cover data
                  3.2.2 Terrain and surface data
        3.3 Radio-climatic zones
        3.4 Terminal distances from the coast
        3.5 Basic radio-meteorological parameters
        3.6 Incidence of ducting
        3.7 Effective Earth radius
        3.8 Parameters derived from the path profile analysis
 4 The prediction procedure
        4.1 General
        4.2 Line-of-sight propagation (including short-term effects)
        4.3 Propagation by diffraction
                  4.3.1 The Bullington part of the diffraction calculation
                  4.3.2 Spherical-Earth diffraction loss
                  4.3.3 First-term part of spherical-Earth diffraction loss
                  4.3.4 Complete “delta-Bullington” diffraction loss model
                  4.3.5 The diffraction loss not exceeded for p% of the time
        4.4 Propagation by tropospheric scatter
        4.5 Propagation by ducting/layer reflection
        4.6 Basic transmission loss not exceeded for p% time and 50% locations
        4.7 Location variability of losses
        4.8 Building entry loss
        4.9 Basic transmission loss not exceeded for p% time and p_L% locations
       4.10 The field strength exceeded for p% time and p_L% locations
Attachment 1 to the Annex  Path profile analysis
 1 Introduction
 2 Construction of path profile
 3 Path length
 4 Path classification
 5 Derivation of parameters from the path profile
        5.1 Transmitting antenna horizon elevation angle above the local horizontal, θ_t
        5.2 Transmitting antenna horizon distance, d_lt
        5.3 Receiving antenna horizon elevation angle above the local horizontal, θ_r
        5.4 Receiving antenna horizon distance, d_lr
        5.5 Angular distance θ (mrad)
        5.6 “Smooth-Earth” model and effective antenna heights
                  5.6.1 Deriving the smooth-Earth surface
                  5.6.2 Smooth-surface heights for the diffraction model
                  5.6.3 Parameters for the ducting/layer-reflection model
Attachment 2 to the Annex  An approximation to the inverse complementary cumulative  normal distribution function
Attachment 3 to the Annex  An alternative method to calculate the spherical earth diffraction loss L_bulls