MacDonald, Dettwiler and Associates Corporation|MacDonald, Dettwiler and Associates Corporation

Purpose

The use of electric orbit raising, instead of chemical propulsion, after launch and separation of the satellite from the launcher to reach the geostationary orbit allows reducing propellant mass, and therefore increasing the maximum allowable spacecraft dry mass. However, today's existing electric propulsion pointing systems are limited in their degrees of freedom and are available at a high price. MDA will develop the Three Axis Deployable Stationary Plasma Thruster Module (TSM), allowing an intensive and efficient use of electric propulsion on telecommunications satellites, both for the orbit-raising phase and the station-keeping manoeuvres. The TSM is a very versatile system, able to re-point thrusters continuously during multiple years of in-orbit life, and benefits from past developments of actuators qualified for constellation missions' antennas.