International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / The SKYBRIDGE constellation will establish telecommunication and TTC links in Kuband, without any exclusive allocation of spectrum: jamming avoidance techniques are used in order to protect the geostationary satellites and associated ground stations that work in the same band. This paper presents the studies that have been carried out at system level.