AP4 – 85 – Items in Appendix B _ CHARACTERISTICS TO BE PROVIDED FOR EACH SATELLITE ANTENNA BEAM OR EACH EARTH STATION OR RADIO ASTRONOMY ANTENNA Advance publication of a geostationary- satellite network Advance publication of a non-geostationary-satellite network subject to coordination under Section II of Article 9 Advance publication of a non-geostationary-satellite network not subject to coordination under Section II of Article 9 Notification or coordination of a geostationary-satellite network (including space operation functions under Article 2A of Appendices 30 or 30A) Notification or coordination of a non- geostationary-satellite network Notification or coordination of an earth station (including notification under Appendices 30A or 30B) Notice for a satellite network in the broadcasting-satellite service under Appendix 30 (Articles 4 and 5) Notice for a satellite network (feeder-link) under Appendix 30A (Articles 4 and 5) Notice for a satellite network in the fixed-satellite service under Appendix 30B (Articles 6 and 8) Items in Appendix Radio astronomy B.3.b.1 the co-polar antenna gain contours plotted on a map of the Earth’s surface, preferably in a radial projection from the satellite onto a plane perpendicular to the axis from the centre of the Earth to the satellite The space station antenna gain contours shall be drawn as isolines of the isotropic gain, at least for −2, −4, −6, −10 and −20 dB and at 10 dB intervals thereafter, as necessary, relative to the maximum antenna gain, when any of these contours is located either totally or partially anywhere within the limit of visibility of the Earth from the given geostationary satellite Whenever possible, the gain contours of the space station antenna should also be provided in a numerical format (e.g. equation or table) Where a steerable beam (see No. 1.191) is used, if the effective boresight area (see No. 1.175) is less than the global service area, the contours are the result of moving the boresight of the steerable beam around the limit defined by the effective boresight area and are to be provided as described above but shall also include the 0 dB relative gain isoline. In addition, for a steerable beam, except for the case of Appendix 30B, see also No. 21.16 (and its associated Rules of Procedure) The antenna gain contours shall include the effects of the planned inclination excursion, longitudinal tolerance and the planned pointing accuracy of the antenna Note – Taking due account of applicable technical restrictions and allowing some reasonable degree of flexibility for satellite operations, administrations should, to the extent practicable, align the areas the satellite steerable beams could cover with the service area of their networks with due regard to their service objectives. In the case of Appendix 30, 30A or 30B, required only for non-elliptical beams X + + + B.3.b.1