RECOMMENDATION ITU-R P.620-5 - Propagation data required for the evaluation of coordination distances ... Annex 1 1 Introduction 2 Structure of the Recommendation 3 General considerations 3.1 Assumptions 3.2 Overview of propagation models 4 Radio-climatic information 4.1 Radio-climatic data 4.2 Radio-climatic zones 4.3 Use of radio-climatic information from other Recommendations 5 Distance limits 5.1 Minimum distance limits 5.2 Maximum distance limits 5.3 Use of distance limits for iterative calculations Determination of the coordination distance for propagation mode (1) … Great circle propagation mechanisms 6.1 Coordination distances based on worst-month time percentages 6.2 Calculation of the coordination distance for propagation mode (1) 7 Determination of the coordination distance for propagation mode (2) - Scattering from hydrometeors 7.1 General 7.2 Coordination distances based on worst-month time percentages 7.3 Calculation of contours for propagation mode (2) 8 Auxiliary contours 8.1 General 8.2 Hydrometeor scatter (propagation mode (2)) Appendix 1 to Annex 1 Appendix 2 to Annex 1 … Calculation of the coordination distance for propagation mode (1) 1 Site shielding 2 Frequencies from 100 MHz up to and including 790 MHz 3 Frequencies between 790 MHz and 60 GHz 4 Frequencies between 60 GHz and 105 GHz Appendix 3 to Annex 1 … Calculation of the coordination distance for propagation mode (2) 1 Overview 2 Maximum calculation distance 3 Calculation of the propagation mode (2) coordination contour 4 Determination of auxiliary contours for propagation mode (2) 4.1 The step-by-step algorithm Appendix 4 to Annex 1 … Reference radiation patterns for line-of-sight radio-relay system antennas for use in ... Appendix 5 to Annex 1 … Input and derived parameters