姿勢制御
The main propulsion unit was mounted above the orbiter bus. Propulsion was furnished by a bipropellant (monomethylhydrazine and nitrogen tetroxide) liquid-fueled rocket engine which could be gimballed up to 9 degrees. The engine was capable of thrust, providing a change in velocity of 1480 m/s. Attitude control was achieved by 12 small compressed-nitrogen jets.