Fig. 5. Perspective view of array wake with active surface backwards. control of the experiment operators boarding STS. Most of the experiments will be conducted in a semiautomatic sequence. The operator will initialize each experiment and select a required flight mode determined by relative position, attitude mode, etc. The operator can change the time-line of experiments when any trouble occurs. Long-Term Mission There are experiments which do not require an operator. A mission consisting of this type of experiment will be categorized as a long-term mission. When the mission lasts more than the nominal mission period of the STS flight, the platform will be left in orbit to be retrieved by another flight of the STS. Experiments for microgravity material science and astronomical observation would be of this category. 5. GROUND OPERATION There are three phases of the ground operation of the SFU platform, the integration phase, the flight phase and the deintegration phase. Integration Phase A flight mission will include several experiments compatible with each other in terms of the flight operation and resources allocation. After a basic configuration is determined by the project coordinator, the PLU boxes will be delivered to each investigator or developer of the instruments for their work to install the instruments and to verify the function of the assembled unit.
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