Mission type | Crew rescue |
---|---|
Mission duration | 4 days |
Spacecraft properties | |
Spacecraft type | Space Shuttle |
Crew | |
Crew size | 4 |
Members | None assigned |
Start of mission | |
Launch date | Flight Day 45 Relative to original mission |
Launch site | Kennedy LC-39 |
End of mission | |
Landing date | Flight Day 49 |
Orbital parameters | |
Reference system | Geocentric |
Regime | Low Earth |
Inclination | 51.6 degrees |
Docking with ISS | |
Docking date | Flight Day 47 |
Undocking date | Flight Day 48 |
Time docked | < 1 day |
Space Shuttle missions designated STS-3xx (officially called Launch On Need (LON) missions) were rescue missions which would have been mounted to rescue the crew of a Space Shuttle if their vehicle was damaged and deemed unable to make a successful reentry. Such a mission would have been flown if Mission Control determined that the heat shielding tiles and reinforced carbon-carbon panels of a currently flying orbiter were damaged beyond the repair capabilities of the available on-orbit repair methods. These missions were also referred to as Launch on Demand (LOD) and Contingency Shuttle Crew Support. The program was initiated following loss of Space Shuttle Columbia in 2003. No mission of this type was launched during the Space Shuttle program.
The orbiter and four of the crew which were due to fly the next planned mission would be retasked to the rescue mission. The planning and training processes for a rescue flight would allow NASA to launch the mission within a period of 40 days of its being called up. During that time the damaged (or disabled) shuttle's crew would have to take refuge on the International Space Station (ISS). The ISS is able to support both crews for around 80 days, with oxygen supply being the limiting factor. [1] Within NASA, this plan for maintaining the shuttle crew at the ISS is known as Contingency Shuttle Crew Support (CSCS) operations. [2] Up to STS-121 all rescue missions were to be designated STS-300.
In the case of an abort to orbit, where the shuttle could have been unable to reach the ISS orbit and the thermal protection system inspections suggested that the shuttle could not have returned to Earth safely, the ISS may have been capable of descending to meet the shuttle. Such a procedure was known as a joint underspeed recovery. [3]
Flight | Rescue flight [2] [4] [5] [6] |
---|---|
STS-114 (Discovery) | STS-300 (Atlantis) |
STS-121 (Discovery) | STS-300 (Atlantis) |
STS-115 (Atlantis) | STS-301 ( Discovery ) |
STS-116 (Discovery) | STS-317 (Atlantis) |
STS-117 (Atlantis) | STS-318 (Endeavour [ citation needed ]) |
STS-118 (Endeavour) | STS-322 (Discovery) |
STS-120 (Discovery) | STS-320 (Atlantis) |
STS-122 (Atlantis) | STS-323 (Discovery*) [7] |
STS-123 (Endeavour) | STS-324 (Discovery) |
STS-124 (Discovery) | STS-326 (Endeavour) |
STS-125 (Atlantis) | STS-400 (Endeavour) |
STS-134 (Endeavour) | STS-335 (Atlantis) |
* – originally scheduled to be Endeavour, changed to Discovery for contamination issues. [7]
To save weight, and to allow the combined crews of both shuttles to return to Earth safely, many shortcuts would have to be made, and the risks of launching another orbiter without resolving the failure which caused the previous orbiter to become disabled would have to be faced.
A number of pieces of Launch on Need flight hardware were built in preparation for a rescue mission including:
This section needs to be updated.(February 2013) |
The Remote Control Orbiter (RCO), also known as the Autonomous Orbiter Rapid Prototype (AORP), was a term used by NASA to describe a shuttle that could perform entry and landing without a human crew on board via remote control. NASA developed the RCO in-flight maintenance (IFM) cable to extend existing auto-land capabilities of the shuttle to allow remaining tasks to be completed from the ground. The purpose of the RCO IFM cable was to provide an electrical signal connection between the Ground Command Interface Logic (GCIL) and the flight deck panel switches. The cable is approximately 28 feet (8.5 m) long, weighs over 5 lb (2.3 kg), and has 16 connectors. [9] [10] With this system, signals could be sent from the Mission Control Center to the unmanned shuttle to control the following systems:
The RCO IFM cable first flew aboard STS-121 and was transferred to the ISS for storage during the mission. The cable remained aboard the ISS until the end of the Shuttle program. Prior to STS-121 the plan was for the damaged shuttle to be abandoned and allowed to burn up on reentry. The prime landing site for an RCO orbiter would be Vandenberg Air Force Base in California. [11] Edwards Air Force Base, a site already used to support shuttle landings, was the prime RCO landing site for the first missions carrying the equipment; however Vandenberg was later selected as the prime site as it is nearer the coast, and the shuttle can be ditched in the Pacific should a problem develop that would make landing dangerous. White Sands Missile Range in New Mexico is a likely alternate site. [12] A major consideration in determining the landing site would be the desire to perform a high-risk re-entry far away from populated areas. The flight resource book, and flight rules in force during STS-121 suggest that the damaged shuttle would reenter on a trajectory such that if it should break up, it would do so with debris landing in the South Pacific Ocean. [2]
The Soviet Buran shuttle was also remotely controlled during its entire maiden flight without a crew aboard. Landing was carried out by an onboard, automatic system. [13]
As of March 2011 the Boeing X-37 extended duration robotic spaceplane has demonstrated autonomous orbital flight, reentry and landing. [14] [15] The X-37 was originally intended for launch from the Shuttle payload bay, but following the Columbia disaster, it was launched in a shrouded configuration on an Atlas V.
Had a LON mission been required, a timeline would have been developed similar to the following:
Mission type | Crew rescue |
---|---|
Mission duration | 7 days |
Spacecraft properties | |
Spacecraft | Space Shuttle Endeavour |
Crew | |
Crew size |
|
Members | |
Landing | |
Orbital parameters | |
Reference system | Geocentric |
Regime | Low Earth |
Inclination | 28.5 degrees |
STS-400 was the Space Shuttle contingency support (Launch On Need) flight that would have been launched using Space Shuttle Endeavour if a major problem occurred on Space Shuttle Atlantis during STS-125, the final Hubble Space Telescope servicing mission (HST SM-4). [17] [18] [19] [20]
Due to the much lower orbital inclination of the HST compared to the ISS, the shuttle crew would have been unable to use the International Space Station as a "safe haven", and NASA would not have been able to follow the usual plan of recovering the crew with another shuttle at a later date. [19] Instead, NASA developed a plan to conduct a shuttle-to-shuttle rescue mission, similar to proposed rescue missions for pre-ISS flights. [19] [21] [22] The rescue mission would have been launched only three days after call-up and as early as seven days after the launch of STS-125, since the crew of Atlantis would only have about three weeks of consumables after launch. [18]
The mission was first rolled out in September 2008 to Launch Complex 39B two weeks after the STS-125 shuttle was rolled out to Launch Complex 39A, creating a rare scenario in which two shuttles were on launch pads at the same time. [19] In October 2008, however, STS-125 was delayed and rolled back to the VAB.
Initially, STS-125 was retargeted for no earlier than February 2009. This changed the STS-400 vehicle from Endeavour to Discovery. The mission was redesignated STS-401 due to the swap from Endeavour to Discovery. STS-125 was then delayed further, allowing Discovery mission STS-119 to fly beforehand. This resulted in the rescue mission reverting to Endeavour, and the STS-400 designation being reinstated. [20] In January, 2009, it was announced that NASA was evaluating conducting both launches from Complex 39A in order to avoid further delays to Ares I-X, which, at the time, was scheduled for launch from LC-39B in the September 2009 timeframe. [20] It was planned that after the STS-125 mission in October 2008, Launch Complex 39B would undergo the conversion for use in Project Constellation for the Ares I-X rocket. [20] Several of the members on the NASA mission management team said at the time (2009) that single-pad operations were possible, but the decision was made to use both pads. [18] [19]
The crew assigned to this mission was a subset of the STS-126 crew: [18] [23]
Position | Launching Astronaut | Landing Astronaut |
---|---|---|
Commander | Christopher Ferguson | |
Pilot | Eric A. Boe | |
Mission Specialist 1 | Robert S. Kimbrough | |
Mission Specialist 2 | Stephen G. Bowen | |
STS-125 Commander | None | Scott D. Altman |
STS-125 Pilot | None | Gregory C. Johnson |
STS-125 Mission Specialist 1 | None | Michael T. Good |
STS-125 Mission Specialist 2 | None | Megan McArthur |
STS-125 Mission Specialist 3 | None | John M. Grunsfeld |
STS-125 Mission Specialist 4 | None | Michael J. Massimino |
STS-125 Mission Specialist 5 | None | Andrew J. Feustel |
Three different concept mission plans were evaluated: The first would be to use a shuttle-to-shuttle docking, where the rescue shuttle docks with the damaged shuttle, by flying upside down and backwards, relative to the damaged shuttle. [22] It was unclear whether this would be practical, as the forward structure of either orbiter could collide with the payload bay of the other, resulting in damage to both orbiters. The second option that was evaluated, would be for the rescue orbiter to rendezvous with the damaged orbiter, and perform station-keeping while using its Remote Manipulator System (RMS) to transfer crew from the damaged orbiter. This mission plan would result in heavy fuel consumption. The third concept would be for the damaged orbiter to grapple the rescue orbiter using its RMS, eliminating the need for station-keeping. [23] The rescue orbiter would then transfer crew using its RMS, as in the second option, and would be more fuel efficient than the station-keeping option. [22]
The concept that was eventually decided upon was a modified version of the third concept. The rescue orbiter would use its RMS to grapple the end of the damaged orbiter's RMS. [17] [24]
After its most recent mission (STS-123), Endeavour was taken to the Orbiter Processing Facility for routine maintenance. Following the maintenance, Endeavour was on stand-by for STS-326 which would have been flown in the case that STS-124 would not have been able to return to Earth safely. Stacking of the solid rocket boosters (SRB) began on 11 July 2008. One month later, the external tank arrived at KSC and was mated with the SRBs on 29 August 2008. Endeavour joined the stack on 12 September 2008 and was rolled out to Pad 39B one week later.
Since STS-126 launched before STS-125, Atlantis was rolled back to the VAB on 20 October, and Endeavour rolled around to Launch Pad 39A on 23 October. When it was time to launch STS-125, Atlantis rolled out to pad 39A. [20]
The Mission would not have included the extended heatshield inspection normally performed on flight day two. [17] [19] Instead, an inspection would have been performed after the crew was rescued. [17] [19] On flight day two, Endeavour would have performed the rendezvous and grapple with Atlantis. [17] [23] On flight day three, the first EVA would have been performed. [17] [19] [23] During the first EVA, Megan McArthur, Andrew Feustel and John Grunsfeld would have set up a tether between the airlocks. [18] [19] They would have also transferred a large size Extravehicular Mobility Unit (EMU) and, after McArthur had repressurized, transferred McArthur's EMU back to Atlantis. Afterwards they would have repressurized on Endeavour, ending flight day two activities. [17]
The final two EVA were planned for flight day three. [17] [19] During the first, Grunsfeld would have depressurized on Endeavour in order to assist Gregory Johnson and Michael Massimino in transferring an EMU to Atlantis. He and Johnson would then repressurize on Endeavour, and Massimino would have gone back to Atlantis. [17] He, along with Scott Altman and Michael Good would have taken the rest of the equipment and themselves to Endeavour during the final EVA. They would have been standing by in case the RMS system should malfunction. [24] The damaged orbiter would have been commanded by the ground to deorbit and go through landing procedures over the Pacific, with the impact area being north of Hawaii. [18] [19] On flight day five, Endeavour would have had a full heat shield inspection, and land on flight day eight. [17] [18] [19]
This mission could have marked the end of the Space Shuttle program, as it is considered unlikely that the program would have been able to continue with just two remaining orbiters, Discovery and Endeavour . [25]
On Thursday, 21 May 2009, NASA officially released Endeavour from the rescue mission, freeing the orbiter to begin processing for STS-127. This also allowed NASA to continue processing LC-39B for the upcoming Ares I-X launch, as during the stand-down period, NASA installed a new lightning protection system, similar to those found on the Atlas V and Delta IV pads, to protect the newer, taller Ares I rocket from lightning strikes. [26] [27]
STS-134 was the last scheduled flight of the Shuttle program. Because no more were planned after this, a special mission was developed as STS-335 to act as the LON mission for this flight. This would have paired Atlantis with ET-122, which had been refurbished following damage by Hurricane Katrina. [28] Since there would be no next mission, STS-335 would also carry a Multi-Purpose Logistics Module filled with supplies to replenish the station. [29]
The Senate authorized STS-135 as a regular flight on 5 August 2010, [30] followed by the House on 29 September 2010, [31] and later signed by President Obama on 11 October 2010. [32] However funding for the mission remained dependent on a subsequent appropriations bill.
Nonetheless NASA converted STS-335, the final Launch On Need mission, into an operational mission (STS-135) on 20 January 2011. [33] On 13 February 2011, program managers told their workforce that STS-135 would fly "regardless" of the funding situation via a continuing resolution. [34] Finally the U.S. government budget approved in mid-April 2011 called for $5.5 billion for NASA's space operations division, including the Space Shuttle and space station programs. According to NASA, the budget running through 30 September 2011 ended all concerns about funding the STS-135 mission. [35]
With the successful completion of STS-134, STS-335 was rendered unnecessary and launch preparations for STS-135 continued as Atlantis neared LC-39A during its rollout as STS-134 landed at the nearby Shuttle Landing Facility. [36]
For STS-135, no shuttle was available for a rescue mission. A different rescue plan was devised, involving the four crew members remaining aboard the International Space Station, and returning aboard Soyuz spacecraft one at a time over the next year. That contingency was not required.
Space Shuttle Atlantis is a retired Space Shuttle orbiter vehicle which belongs to NASA, the spaceflight and space exploration agency of the United States. Atlantis was manufactured by the Rockwell International company in Southern California and was delivered to the Kennedy Space Center in Eastern Florida in April 1985. Atlantis is also the fourth operational and the second-to-last Space Shuttle built. Its maiden flight was STS-51-J made from October 3 to 7, 1985.
STS-121 was a 2006 Space Shuttle mission to the International Space Station (ISS) flown by Space ShuttleDiscovery on its 32nd flight. 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.
STS-116 was a Space Shuttle mission to the International Space Station (ISS) flown by Space Shuttle Discovery. Discovery lifted off on December 9, 2006 for her 33rd flight at 20:47:35 EST. A previous launch attempt on December 7 had been canceled due to cloud cover. It was the first night launch of a Space Shuttle since STS-113 in November 2002.
STS-117 was a Space Shuttle mission flown by Space Shuttle Atlantis, launched from pad 39A of the Kennedy Space Center on June 8, 2007. Atlantis lifted off from the launch pad at 19:38 EDT. Damage from a hail storm on February 26, 2007, had previously caused the launch to be postponed from an originally-planned launch date of March 15, 2007. The launch of STS-117 marked the 250th orbital human spaceflight. It was also the heaviest flight of the Space Shuttle.
STS-118 was a Space Shuttle mission to the International Space Station (ISS) flown by the orbiter Endeavour. STS-118 lifted off on August 8, 2007, from launch pad 39A at Kennedy Space Center (KSC), Florida and landed at the Shuttle Landing Facility at KSC on August 21, 2007.
STS-122 was a NASA Space Shuttle mission to the International Space Station (ISS), flown by the Space ShuttleAtlantis. STS-122 marked the 24th shuttle mission to the ISS, and the 121st Space Shuttle flight overall.
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-126 was the one hundred and twenty-fourth NASA Space Shuttle mission, and twenty-second orbital flight of the Space Shuttle Endeavour (OV-105) to the International Space Station (ISS). The purpose of the mission, referred to as ULF2 by the ISS program, was to deliver equipment and supplies to the station, to service the Solar Alpha Rotary Joints (SARJ), and repair the problem in the starboard SARJ that had limited its use since STS-120. STS-126 launched on 15 November 2008 at 00:55:39 UTC from Launch Pad 39A (LC-39A) at NASA's Kennedy Space Center (KSC) with no delays or issues. Endeavour successfully docked with the station on 16 November 2008. After spending 15 days, 20 hours, 30 minutes, and 30 seconds docked to the station, during which the crew performed four spacewalks, and transferred cargo, the orbiter undocked on 28 November 2008. Due to poor weather at Kennedy Space Center, Endeavour landed at Edwards Air Force Base on 30 November 2008 at 21:25:09 UTC.
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.
STS-125, or HST-SM4, was the fifth and final Space Shuttle mission to the Hubble Space Telescope (HST). The launch of the Space Shuttle Atlantis occurred on May 11, 2009, at 2:01 pm EDT. Landing occurred on May 24 at 11:39 am EDT, with the mission lasting a total of just under 13 days.
STS-123 was a Space Shuttle mission to the International Space Station (ISS) which was flown by Space Shuttle Endeavour. STS-123 was the 1J/A ISS assembly mission. The original launch target date was February 14, 2008, but after the delay of STS-122, the shuttle was launched on March 11, 2008. It was the twenty-fifth shuttle mission to visit the ISS, and delivered the first module of the Japanese laboratory, Japanese Experiment Module (Kibō), and the Canadian Special Purpose Dexterous Manipulator, (SPDM) Dextre robotics system to the station. The mission duration was 15 days and 18 hours, and it was the first mission to fully utilize the Station-to-Shuttle Power Transfer System (SSPTS), allowing space station power to augment the shuttle power systems. The mission set a record for a shuttle's longest stay at the ISS.
STS-128 was a NASA Space Shuttle mission to the International Space Station (ISS) that launched on August 28, 2009. Space ShuttleDiscovery carried the Multi-Purpose Logistics Module Leonardo as its primary payload. It was Discovery's 37th flight. Leonardo contained a collection of experiments for studying the physics and chemistry of microgravity. Three spacewalks were carried out during the mission, which removed and replaced a materials processing experiment outside ESA's Columbus module, and returned an empty ammonia tank assembly.
STS-129 was a NASA Space Shuttle mission to the International Space Station (ISS). Atlantis was launched on November 16, 2009, at 14:28 EST, and landed at 09:44 EST on November 27, 2009, on runway 33 at the Kennedy Space Center's Shuttle Landing Facility. It was also the last Shuttle mission of the 2000s.
STS-130 was a NASA Space Shuttle mission to the International Space Station (ISS). Space ShuttleEndeavour's primary payloads were the Tranquility module and the Cupola, a robotic control station with six windows around its sides and another in the center, providing a 360-degree view around the station. Endeavour launched at 04:14 EST on February 8, 2010, and landed at 22:22 EST on February 21, 2010, on runway 15 at the Kennedy Space Center's Shuttle Landing Facility.
STS-131 was a NASA Space Shuttle mission to the International Space Station (ISS). Space ShuttleDiscovery launched on April 5, 2010, at 6:21 am from LC-39A, and landed at 9:08 am on April 20, 2010, on runway 33 at the Kennedy Space Center's Shuttle Landing Facility. The mission marked the longest flight for Space Shuttle Discovery and its 38th and penultimate flight.
STS-132 was a NASA Space Shuttle mission, during which Space Shuttle Atlantis docked with the International Space Station on May 16, 2010. STS-132 was launched from the Kennedy Space Center on May 14, 2010. The primary payload was the Russian Rassvet Mini-Research Module, along with an Integrated Cargo Carrier-Vertical Light Deployable (ICC-VLD). Atlantis landed at the Kennedy Space Center on May 26, 2010.
STS-400 was the Space Shuttle contingency support flight that would have been launched using Space ShuttleEndeavour if a major problem occurred on Space ShuttleAtlantis during STS-125, the final Hubble Space Telescope servicing mission.
STS-134 was the penultimate mission of NASA's Space Shuttle program and the 25th and last spaceflight of Space ShuttleEndeavour. This flight delivered the Alpha Magnetic Spectrometer and an ExPRESS Logistics Carrier to the International Space Station. Mark Kelly served as the mission commander. STS-134 was expected to be the final Space Shuttle mission if STS-135 did not receive funding from Congress. However, in February 2011, NASA stated that STS-135 would fly "regardless" of the funding situation. STS-135, flown by Atlantis, took advantage of the processing for STS-335, the Launch on Need mission that would have been necessary if the STS-134 crew became stranded in orbit.
STS-135 was the 135th and final mission of the American Space Shuttle program. It used the orbiter Atlantis and hardware originally processed for the STS-335 contingency mission, which was not flown. STS-135 launched on July 8, 2011, and landed on July 21, 2011, following a one-day mission extension. The four-person crew was the smallest of any shuttle mission since STS-6 in April 1983. The mission's primary cargo was the Multi-Purpose Logistics Module (MPLM) Raffaello and a Lightweight Multi-Purpose Carrier (LMC), which were delivered to the International Space Station (ISS). The flight of Raffaello marked the only time that Atlantis carried an MPLM.
The retirement of NASA's Space Shuttle fleet took place from March to July 2011. Discovery was the first of the three active Space Shuttles to be retired, completing its final mission on March 9, 2011; Endeavour did so on June 1. The final shuttle mission was completed with the landing of Atlantis on July 21, 2011, closing the 30-year Space Shuttle program.
The structure is built with allowance for three possible Orbiter's control modes: automatic, manual and under commands from the ground-based control complex (GBCC).