RECOMMENDATION ITU-R S.1526-1 - Definition of a non-geostationary-satellite orbit fixed-satellite service system ... ANNEX 1 - Methodology to assess the interference environment generated by a non-GSO FSS system 1 Introduction 2 Example for the sharing between non-GSO FSS systems: Impact of modifications to LEOSAT-1 on USAMEO-1 2.1 LEOSAT-1 system parameters and assumptions 2.2 USAMEO-1 system parameters and assumptions 2.3 Simulation results 3 Example for the sharing with a GSO FSS system: Impact of modifications to LEOSAT-1 on GSO FSS System P 3.1 System P parameters and assumptions 3.2 Simulation results based on limiting interference in all four cases to the Recommendation ITU-R S.1323 levels 3.3 Simulation results based on only limiting interference in Cases 1 and 2 to Recommendation ITU-R S.1323 levels ANNEX 2 - Rain degradation modelling for convolutions 1 Introduction 2 Rain fade and rain degradation relationship in downlink 3 Rain fade and rain degradation relationship in uplink 4 Power control modelling