The Determination of the Coordination Area around Earth Stations

The current Appendix S7 (28) of the International Telecommunication Union Radio Regulations on the method(s) for the determination of the coordination area around an earth station has been in existence for over 20 years. In view of the many new frequency allocations and new systems, the ITU recognised that there is a need to update the Appendix and has therefore established Task Group (TG) 1/6 in early 1997 to establish the technical basis for the World Radio Conference to study this urgent matter. This paper reports the work conducted in TG 1/6 which was completed in November 1999.