Application of Symphonie experiences in follow-up projects at MBB

The technology of three axis stabilization and bipropellant propulsion systems for Symphonie as well as improvements in follow on projects are described. The three axis attitude control system of Intelsat V is a derivation of the Symphonie stabilization system, improved for higher accuracies and adapted to a heavy satellite with large flexible solar arrays. The Symphonie bipropellant technology is applied in the Galileo project, a joint US-German program for the exploration of Jupiter. The Symphonie 10 and 400 N engines are used with small modifications, but are now served by a common feed and tank system (unified system). The direct broadcasting satellite TV-SAT uses Symphonie technology to a large extent. Three axis attitude control, which has to assure very high antenna pointing accuracies, is still based on the Symphonie bias momentum principle with ball bearing supported flywheels. Optical sensor technology is also derived from Symphonie.