power estimates for the operational phase. The elements in both tables include the pressurized modules which exist at phase I; i.e. one US habitation module, one US lab module, one European Columbus lab and one Japanese experiment module (JEM). The power estimates in both Tables are based on extrapolations of mission power requirements identified in the MUS [6] and element housekeeping power assumptions from the SSF Program office as of September 1988. In Table III, a second hab module is added to accommodate a crew of up to 16. The general science lab is the phase I US lab focused toward animal life science research as well as microgravity research. A second lab is added which is dedicated to human research and the development of zero-£ countermeasures. Much of the technology development occurs in the JEM which provides an exposed facility as well as pressurized volume for payloads. The closed experimental life support system or CELSS is a plant growth and food production test bed that supports future expeditions to distant planets. Both CELSS and the four meter centrifuge are housed in pocket labs which are planned as derivatives of the station common module (reduced length) and will be attached to a resource node port on the space station module pattern. The unpressurized servicing facility will support station-based servicing of free flying satellites such as the Hubble Space Telescope. A third hab module is added during the mature operational phase to accommodate the increased demand for crew driven by vehicle turn-around operations. A servicing/ assembly lab is also added that serves as a pressurized ‘workshop’ for vehicle operations. At this time, minimal microgravity research occurs in the labs due to frequent exploration mission disturbances to the low gravity environment. This explains the reduced power levels in Table IV. Attached pay loads, in the context of mature node operations, could be payloads destined for the Martian or lunar surface and/or science and technology payloads.
RkJQdWJsaXNoZXIy MTU5NjU0Mg==