ITU R S 1589:2002 Continuous Curves Of Epfddown Versus Geostationary Fixed-satellite Service Earth Station Antenna Diameter And Epfdup Versus Geostationary Fixed-satellite Service Space Station Antenna Beamwidth To Indicate The Protection Afforded By Systems Complying With The Limits To Antennas With Diameters Other Than Those In Article 22 Of The Radio Regulations