RECOMMENDATION ITU-R SF.1006* - Determination of the interference potential between earth stations ... ANNEX 1 - Determination of the interference potential between fixed satellite service earth stations and stations in the fixe 1. Preliminary elimination procedure 2. Determination of interference potential due to great-circle propagation mechanisms, mode (1) 2.1 Level of maximum permissible interference 2.2 Minimum permissible basic transmission loss 2.3 Available basic transmission loss 3. Determination of interference potential in the presence of precipitation scatter, mode (2) 4. Summary APPENDIX 1 TO APPENDIX 1 - Auxiliary contours associated with angular discrimination