ExoTerra’s propulsion module is an all-in-one iodine propulsion system. The module includes a Halo thruster, thrust vector controller, iodine storage and distribution system, and power processing unit. The system configuration (including propellant volume) can be tailored to meet mission specific mission requirements. The power processing unit handles not just power for the Halo thruster but all thruster, TVC, and propellant distribution system operations.