refuse and other waste products including draining of the potable water system were offloaded.high pressure gases were vented from the environmental control and life support systems.The oxygen system was rendered inert with gaseous nitrogen and the hydrogen system with gaseous helium. fuel cells tanks were drained of remaining cryogenic reactants.payload bay doors were opened and any hazardous payloads were processed for safety.The orbiter's main engines were purged to remove the moisture that was a by-product of liquid oxygen and liquid hydrogen combustion.Any remaining payloads from the previous mission were removed and the vehicle was fully inspected, tested, and refurbished. Discovery inside OPF-3 following the completion of mission STS-114 When a shuttle mission was completed, the orbiter was towed from the Shuttle Landing Facility to its assigned OPF where it spent several months (typically less than 100 days) being prepared for the next mission. OPF-3 was previously called the Orbiter Maintenance & Refurbishment Facility (OMRF), but was upgraded to a fully functioning OPF. OPF-1 and OPF-2 were connected with a low bay between them, while OPF-3 is across the street. They were located west of the Vehicle Assembly Building, where the orbiter was mated with its External Tank and Solid Rocket Boosters before transport to the launch pad. All three such facilities, OPF-1, OPF-2 and OPF-3, were located at NASA's Kennedy Space Center in Florida at Launch Complex 39. space shuttle orbiters underwent maintenance between flights. Orbiter Processing Facility This page uses Creative Commons Licensed content from Wikipedia ( view authors).Īn Orbiter Processing Facility ( OPF) was one of three hangars where U.S.
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