A system for providing attitude control with respect to a spacecraft is
provided. The system includes a reaction wheel control module configured
to control a number of reaction wheel assemblies associated with the
spacecraft in order to control attitude, and a maneuver control module
configured to use a number of gimbaled Hall Current thrusters (HCTs) to
control the total momentum associated with the spacecraft during an orbit
transfer. The total momentum includes the momentum associated with the
reaction wheel assemblies and the angular momentum of the spacecraft.
Using the gimbaled HCTs to control the momentum associated with the
reaction wheel assemblies during the orbit transfer results in minimal
HCT gimbal stepping.