![]() ![]() Mission Director: Kepler spacecraft is go. LC: Prop 1, vehicle fuel tank press open. Launch Control (LC): OSM, third stage S&A arm permit to close. For example, dialogue heard during the launch of a Delta II rocket carrying the Kepler Space Telescope on March 8, 2009, included: All Firing Room console positions are assigned unique 'call signs' that are used by the team for quick and positive identification of who is talking. ĭuring communications for a countdown, the launch team uses acronyms to keep channels open as much as possible. When that happens, launch personnel begin following the countdown checklist from the earlier point. Under some circumstances, a countdown may be recycled to an earlier time. Some holds are planned: they are done so the launch-support computers can run automatic checks on the rocket. This can be done to investigate a technical process that has gone wrong, or because of marginal weather at the launch pad. Ī hold is the suspension of the normal countdown process. ![]() The launch window is a precise time during which aerospace personnel launch a rocket so the payload can reach the proper orbital destination. A formal prelaunch weather briefing was held on Launch minus 1 day, which was a specific weather briefing for all areas of Space Shuttle launch operations. These included weather trends and their possible effects on launch day. ![]() Air Force Range Weather Operations Facility at Cape Canaveral began at Launch minus 5 days in coordination with the NOAA National Weather Service Spaceflight Meteorology Group at the Johnson Space Center in Houston. For the Space Shuttle, weather "outlooks" provided by the U. The criteria are broadly conservative and assure avoidance of possibly adverse conditions. The launch weather guidelines involving the Space Shuttle and expendable rockets are similar in many areas, but a distinction is made for the individual characteristics of each. Proceeding with the countdown depends on several factors, such as the proper launch window, weather that permits a safe launch, and the rocket and payload working properly.Ĭountdown clock at NASA's Kennedy Space Center at L-11 hours (28 April 2011) of STS-134, Space Shuttle Endeavour. Each mission requires approximately 100 procedure books. These documents are living documents, which reflect new issues and solutions as they develop. Rosie Carver, a technical writer for United Launch Alliance, has created at least 15,000 procedures for more than 300 missions since the Solar Maximum Mission, which launched Feb. For the Space Shuttle, a five-volume set, Shuttle Countdown (KSC S0007), often referred to as "S0007", was used. The procedures for each launch are written carefully.
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