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The Columbia Accident Investigation Board (CAIB) was an internal commission convened by NASA to investigate the destruction of the Space Shuttle Columbia during STS-107 upon atmospheric re-entry on February 1, 2003. [1] [2] The panel determined that the accident was caused by foam insulation breaking off from the external fuel tank, forming debris which damaged the orbiter's wing, and that the problem of "debris shedding" was well known but considered "acceptable" by management. [3] The panel also recommended changes that should be made to increase the safety of future shuttle flights. The CAIB released its final report on August 26, 2003. [4] [5] [6]
The board found both the immediate physical cause of the accident and also what it called organizational causes.
82 seconds after launch a large piece of foam insulating material, the "left bipod foam ramp", broke free from the external tank and struck the leading edge of the shuttle's left wing, damaging the protective carbon heat shielding panels.
During re-entry into the Earth's atmosphere, this damage allowed super-heated gases to enter and erode the inner wing structure which led to the destruction of Columbia. It was the seventh instance of a piece of foam, from this particular area of the external tank, breaking free during launch, and the only instance of structural damage as a result of the breakage. [7]
The problem of debris shedding from the external tank was well known and had caused shuttle damage on every prior shuttle flight. The damage was usually, but not always, minor. Over time, management gained confidence that it was an acceptable risk. NASA decided that it did not warrant an extra EVA (extravehicular activity) for visual inspection, feeling that it would be like a car going down a highway and hitting a Styrofoam cooler.[ citation needed ]
The board made 29 specific recommendations to NASA to improve the safety of future shuttle flights. These recommendations include:
Only two further Space Shuttle missions were allowed to be flown before the implementation of these recommendations.
After the CAIB report came out, NASA implemented all recommended changes and flew its first post-Columbia mission in 2005. As part of the CAIB recommendations, the Shuttle carried a 50-foot inspection boom attached to the robot arm, which was used within 24 hours of launch to check the orbiter for damage. As all but one of the post-Columbia missions were concentrated on the International Space Station, primarily to provide a "safe haven" in the event an orbiter was damaged beyond the normal repair methods, NASA implemented a STS-3xx contingency mission program that could launch a rescue orbiter on short notice, similar to the Skylab Rescue that was planned during the Skylab program.
NASA retired the Space Shuttle fleet on July 21, 2011, after completing the ISS and the final flight and subsequent landing of Atlantis. The Shuttle's replacement, Orion, was to have consisted of an Apollo-derived spacecraft launched on the Ares I rocket, which would use a Space Shuttle Solid Rocket Booster as its first stage. Orion would not face the dangers of either an O-ring failure (due to the presence of a launch escape system [8] ) or shedding foam (as the spacecraft would be launched in a stack configuration). In addition to ferrying crews to the ISS, the Orion spacecraft was (as part of Project Constellation) to allow NASA to return to the Moon. [8] President Obama signed the NASA Authorization Act 2010 on October 11 which officially brought the Constellation program to an end, replacing it with the Space Launch System (SLS) and Multi-Purpose Crew Vehicle (MPCV) programs to develop the launch vehicle and spacecraft to enable human exploration missions beyond low-Earth orbit. [9]
Chairman of the board
Board members
Source: [11]
The Space Shuttle is a retired, partially reusable low Earth orbital spacecraft system operated from 1981 to 2011 by the U.S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. Its official program name was Space Transportation System (STS), taken from the 1969 plan led by U.S. Vice President for a system of reusable spacecraft where it was the only item funded for development, as nuclear shuttle in the plan was cancelled.
Space Shuttle Enterprise was the first orbiter of the Space Shuttle system. Rolled out on September 17, 1976, it was built for NASA as part of the Space Shuttle program to perform atmospheric test flights after being launched from a modified Boeing 747. It was constructed without engines or a functional heat shield. As a result, it was not capable of spaceflight.
Space Shuttle Columbia (OV-102) was a Space Shuttle orbiter manufactured by Rockwell International and operated by NASA. Named after the first American ship to circumnavigate the upper North American Pacific coast and the female personification of the United States, Columbia was the first of five Space Shuttle orbiters to fly in space, debuting the Space Shuttle launch vehicle on its maiden flight on April 12, 1981. As only the second full-scale orbiter to be manufactured after the Approach and Landing Test vehicle Enterprise, Columbia retained unique features indicative of its experimental design compared to later orbiters, such as test instrumentation and distinctive black chines. In addition to a heavier fuselage and the retention of an internal airlock throughout its lifetime, these made Columbia the heaviest of the five spacefaring orbiters; around 1,000 kilograms heavier than Challenger and 3,600 kilograms heavier than Endeavour. Columbia also carried ejection seats based on those from the SR-71 during its first six flights until 1983, and from 1986 onwards carried an imaging pod on its vertical stabilizer.
The Space Shuttle program was the fourth human spaceflight program carried out by the U.S. National Aeronautics and Space Administration (NASA), which accomplished routine transportation for Earth-to-orbit crew and cargo from 1981 to 2011. Its official program name was Space Transportation System (STS), taken from a 1969 plan for a system of reusable spacecraft where it was the only item funded for development, as a proposed nuclear shuttle in the plan was cancelled in 1972. It flew 135 missions and carried 355 astronauts from 16 countries, many on multiple trips.
STS-107 was the 113th flight of the Space Shuttle program, and the 28th and final flight of Space Shuttle Columbia. The mission ended on February 1, 2003, with the Space Shuttle Columbia disaster which killed all seven crew members and destroyed the space shuttle. It was the 88th post-Challenger disaster mission.
On Saturday, February 1, 2003, Space Shuttle Columbia disintegrated as it reentered the atmosphere over Texas and Louisiana, killing all seven astronauts on board. It was the second Space Shuttle mission to end in disaster, after the loss of Challenger and crew in 1986.
STS-1 was the first orbital spaceflight of NASA's Space Shuttle program. The first orbiter, Columbia, launched on April 12, 1981, and returned on April 14, 1981, 54.5 hours later, having orbited the Earth 37 times. Columbia carried a crew of two—commander John W. Young and pilot Robert L. Crippen. It was the first American crewed space flight since the Apollo–Soyuz Test Project (ASTP) in 1975. STS-1 was also the maiden test flight of a new American spacecraft to carry a crew, though it was preceded by atmospheric testing (ALT) of the orbiter and ground testing of the Space Shuttle system.
STS-5 was the fifth NASA Space Shuttle mission and the fifth flight of the Space Shuttle Columbia. It launched on November 11, 1982, and landed five days later on November 16, 1982. STS-5 was the first Space Shuttle mission to deploy communications satellites into orbit, and the first officially "operational" Space Shuttle mission.
On January 28, 1986, the Space Shuttle Challenger broke apart 73 seconds into its flight, killing all seven crew members aboard. The spacecraft disintegrated 46,000 feet (14 km) above the Atlantic Ocean, off the coast of Cape Canaveral, Florida, at 11:39 a.m. EST. It was the first fatal accident involving an American spacecraft while in flight.
The Rogers Commission Report was written by a Presidential Commission charged with investigating the Space Shuttle Challenger disaster during its 10th mission, STS-51-L. The report, released and submitted to President Ronald Reagan on June 9, 1986, both determined the cause of the disaster that took place 73 seconds after liftoff, and urged NASA to improve and install new safety features on the shuttles and in its organizational handling of future missions.
STS-112 was an 11-day Space Shuttle mission to the International Space Station (ISS) flown by Space ShuttleAtlantis. Space Shuttle Atlantis was launched on 7 October 2002 at 19:45 UTC from the Kennedy Space Center's launch pad 39B to deliver the 28,000 pound Starboard 1 (S1) truss segment to the Space Station. Ending a 4.5-million-mile journey, Atlantis landed at 15:44 UTC on 18 October 2002 on runway 33 at the Kennedy Space Center's Shuttle Landing Facility.
STS-70 was the 21st flight of the Space Shuttle Discovery, and the last of 7 shuttle missions to carry a Tracking and Data Relay Satellite (TDRS). This was the first shuttle mission controlled from the new mission control center room at the Johnson Space Center in Houston.
STS-114 was the first "Return to Flight" Space Shuttle mission following the Space Shuttle Columbia disaster. Discovery launched at 10:39 EDT, July 26, 2005. The launch, 907 days after the loss of Columbia, was approved despite unresolved fuel sensor anomalies in the external tank that had prevented the shuttle from launching on July 13, its originally scheduled date.
The Space Shuttle external tank (ET) was the component of the Space Shuttle launch vehicle that contained the liquid hydrogen fuel and liquid oxygen oxidizer. During lift-off and ascent it supplied the fuel and oxidizer under pressure to the three RS-25 main engines in the orbiter. The ET was jettisoned just over 10 seconds after main engine cut-off (MECO) and it re-entered the Earth's atmosphere. Unlike the Solid Rocket Boosters, external tanks were not re-used. They broke up before impact in the Indian Ocean, away from shipping lanes and were not recovered.
STS-121 was a 2006 NASA Space Shuttle mission to the International Space Station (ISS) flown by Space ShuttleDiscovery. The main purposes of the mission were to test new safety and repair techniques introduced following the Columbia disaster of February 2003 as well as to deliver supplies, equipment and German European Space Agency (ESA) astronaut Thomas Reiter to the ISS.
The Space Shuttle thermal protection system (TPS) is the barrier that protected the Space Shuttle Orbiter during the searing 1,650 °C (3,000 °F) heat of atmospheric reentry. A secondary goal was to protect from the heat and cold of space while in orbit.
STS-127 was a NASA Space Shuttle mission to the International Space Station (ISS). It was the twenty-third flight of Space ShuttleEndeavour. The primary purpose of the STS-127 mission was to deliver and install the final two components of the Japanese Experiment Module: the Exposed Facility, and the Exposed Section of the Experiment Logistics Module (ELM-ES). When Endeavour docked with the ISS on this mission in July 2009, it set a record for the most humans in space at the same time in the same vehicle, the first time thirteen people have been at the station at the same time. Together they represented all ISS program partners and tied the general record of thirteen people in space with the first such occurrence of 1995.
STS-133 was the 133rd mission in NASA's Space Shuttle program; during the mission, Space Shuttle Discovery docked with the International Space Station. It was Discovery's 39th and final mission. The mission launched on February 24, 2011, and landed on March 9, 2011. The crew consisted of six American astronauts, all of whom had been on prior spaceflights, headed by Commander Steven Lindsey. The crew joined the long-duration six person crew of Expedition 26, who were already aboard the space station. About a month before lift-off, one of the original crew members, Tim Kopra, was injured in a bicycle accident. He was replaced by Stephen Bowen.
Linda Ham is a former Constellation Program Transition and Technology Infusion Manager at NASA. She was formerly the program integration manager in the NASA Space Shuttle Program Office and acting manager for launch integration. In this position, she chaired the mission management team for all shuttle flights between 2001 and 2003, including shuttle mission STS-107 that ended with the catastrophic destruction of Columbia upon its planned reentry into the Earth's atmosphere.
Criticism of the Space Shuttle program stemmed from claims that NASA's Space Shuttle program failed to achieve its promised cost and utility goals, as well as design, cost, management, and safety issues. Fundamentally, it failed in the goal of reducing the cost of space access. Space Shuttle incremental per-pound launch costs ultimately turned out to be considerably higher than those of expendable launchers. In 2010, the incremental cost per flight of the Space Shuttle was $409 million, or $14,186 per kilogram to low Earth orbit (LEO). In contrast, the comparable Proton launch vehicle cost was $141 million, or $6,721 per kilogram to LEO and the Soyuz 2.1 was $55 million, or $6,665 per kilogram, despite these launch vehicles not being reusable.