A velocity change (V) thruster is operated on a spacecraft, which unavoidably
causes attitude error. A reaction wheel (RWA) corrects the attitude. At the beginning
of the thruster maneuver, the total attitude control momentum required to at least
correct for the V thruster attitude errors over the duration of the entire
maneuver is determined, and the RWA momentum may also be determined. Attitude control
thrusters (REAs) are operated. The REAs are operated to correct at least the net
V thruster induced attitude error, and preferably also to reset the RWA
to its nominal momentum. The maneuver may be stationkeeping.
