Abstract: A spacecraft system is provided, including a measurement device configured to measure information associated with position of a spacecraft, a filter configured to process the measured information and to provide estimated pre-maneuver information associated with position of the spacecraft and estimated post-maneuver information associated with position of the spacecraft, a propagator configured to predict post-maneuver information associated with position of the spacecraft based upon the estimated pre-maneuver information associated with position of the spacecraft and a model of a maneuver of the spacecraft, an error calculator configured to calculate an acceleration error based upon the estimated post-maneuver information associated with position of the spacecraft and the predicted post-maneuver information associated with position of the spacecraft, and a maneuver archive configured to store the acceleration error for updating the model of the maneuver.

Abstract: A cooling structure for the body of a crystal-growing furnace includes an upper body and a lower body. The upper body includes an outer upper shell and an inner upper shell, wherein an upper enclosing space is formed between the outer upper shell and the inner upper shell. The lower body includes an outer lower shell and an inner lower shell, wherein a lower enclosing space is formed between the outer lower shell and the inner lower shell. A plurality of water pipes are arranged, respectively, around the upper and the lower enclosing spaces, wherein plural spraying holes are provided on each of the water pipes. With the help of a pump, water from an outside water source is drawn through the spraying holes of the water pipes so as to cool down the body of the crystal-growing furnace. In adding an exhaust fan, warm air in the upper enclosing spaces can be driven out speedily.

Abstract: A cooling structure for the body of a crystal-growing furnace includes an upper body and a lower body. The upper body includes an outer upper shell and an inner upper shell, wherein an upper enclosing space is formed between the outer upper shell and the inner upper shell. The lower body includes an outer lower shell and an inner lower shell, wherein a lower enclosing space is formed between the outer lower shell and the inner lower shell. A plurality of water pipes are arranged, respectively, around the upper and the lower enclosing spaces, wherein plural spraying holes are provided on each of the water pipes. With the help of a pump, water from an outside water source is drawn through the spraying holes of the water pipes so as to cool down the body of the crystal-growing furnace. In adding an exhaust fan, warm air in the upper enclosing spaces can be driven out speedily.