New configuration of a telecommunication multimission satellite system

The results of a preliminary study of an advanced configuration for a multimission multifrequency GEO spacecraft to be launched by the Ariane IV are presented. The multiple use of the platform requires multiple antennas and thereby redesign of the antenna booms, increases in the platform weight, long feeders from the electronics units to the antenna system, and upgraded control and stabilization systems. A possible solution is an antenna with a reflector feed system, one or two reflectors used for different functions, in-orbit servicing, and extensive use of dichroic surfaces. The communications packages would be modular to aid in on-orbit servicing. A payload with capabilities for L-, C-, X-, and K-band transmission/reception is described, as is a reflector compatible with Ariane IV configuration limitations.