Another Name:- ISS-12A2006 American crewed spaceflight 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.
The mission is also referred to as ISS-12A.1 by the ISS program. The main goals of the mission were delivery and attachment of the International Space Station's P5 truss segment, a major rewiring of the station's power system, and exchange of ISS Expedition 14 personnel. The shuttle landed at 17:32 EST on December 22, 2006, at Kennedy Space Center 98 minutes off schedule due to unfavorable weather conditions. This mission was particularly notable to Sweden, being the first spaceflight of a Scandinavian astronaut (Christer Fuglesang).
STS-116 was the final scheduled Space Shuttle launch from Pad 39B as NASA reconfigured it for Ares I launches. The only remaining use of Pad 39B by the shuttle was as a reserve for the STS-400 Launch on Need mission to rescue the crew of STS-125, the final Hubble Space Telescope servicing mission, if their shuttle became damaged.
After STS-116, "Discovery" entered a period of maintenance. Its next mission would be STS-120 starting on October 23, 2007.
Crew.
Crew notes.
Originally this mission was to carry the Expedition 8 crew to the ISS. The original crew was to be:
Mission highlights.
Mission notes.
As one of the main goals of STS-116 was to exchange ISS Expedition 14 crew members, the crew of STS-116 changed mid-flight. ISS Flight Engineer Sunita "Suni" Williams was part of the STS-116 crew for the first portion of the mission. She then replaced ISS Flight Engineer Thomas Reiter on the Expedition 14 crew and Reiter joined the STS-116 crew for the return to Earth.
Final Assembly Power Converter Unit mission for "Discovery".
During planned orbiter upgrades that took place subsequent to this mission, "Discovery"'s "Assembly Power Converter Units" (APCUs) were removed and replaced with the shuttle-side components of the Station-Shuttle Power Transfer System (SSPTS). The APCUs converted 28VDC orbiter main bus power to 124VDC, compatible with the ISS's 120VDC main bus power. During initial station assembly missions, orbiter APCU power was used to augment the power available from the Russian service segment. With the operation of permanent main electrical systems (e.g. P4 array and SARJ, MBSUs, DDCUs, Ammonia cooling systems), orbiter power was no longer needed by the ISS.
After STS-118, "Discovery" and "Endeavour" drew power from the ISS, although "Atlantis" was never upgraded with the SSPTS. This system slowed the orbiters' consumption of hydrogen and oxygen used by their onboard electricity-generating fuel cells. The hydrogen and oxygen supplies, stored cryogenically in tanks aboard the orbiter, limited the duration of Space Shuttle missions. As a result of the changeover to SSPTS, "Discovery" and "Endeavour" gained approximately 50% of the time that would have been spent docked otherwise. This resulted in 2–4 extra days for each ISS-docked mission.
Mission payloads.
The primary payload for the STS-116 mission was the P5 Truss segment of the International Space Station. The shuttle also carried a Spacehab Logistics Module to resupply the ISS, and an Integrated Cargo Carrier with four sub-satellites, which were deployed after undocking from the ISS: the ANDE technology demonstrator (OSCAR 61 and 62), developed by the Naval Research Laboratory, and three CubeSats (RAFT-1 (OSCAR 60) and MARScom for the United States Naval Academy, and MEPSI 2A/2B for DARPA). It was the first Shuttle mission to deploy satellites since STS-113 in 2002.
Mission background.
STS-116 was planned (post return-to-flight) to launch on December 14, 2006. But on November 29, 2006 NASA announced that the launch team had been asked to aim for a launch on December 7, 2006, rather than the original target date of December 14. The launch window for the STS-116 mission opened on December 7 and extended through December 17. The seven-member flight crew arrived for launch at Kennedy's Shuttle Landing Facility on December 3, 2006, in the afternoon.
Primary payloads on the 13-day mission were the P5 integrated truss segment, SPACEHAB single logistics module, and an integrated cargo carrier. The STS-116 mission was the 20th Shuttle flight to the station.
Launch on the new, earlier date required a night-time launch. Subsequent to the "Columbia" disaster, NASA had imposed rules requiring shuttle launches to be conducted during the day, when light would be sufficient for cameras to observe falling debris. With the redesign of shuttle tank foam having minimized the amount of falling debris and the availability of in-orbit inspection procedures, the daylight-launch requirement was relaxed.
Rollover of "Discovery" to the Vehicle Assembly Building (VAB) occurred on October 31, and on November 1 the orbiter was raised into a vertical orientation and moved into High Bay 3 to be mated with the external tank and solid rocket boosters. Rollout to Launch Complex 39B was completed on Thursday November 11.
The crew for the mission arrived at Kennedy Space Center on November 13 to begin their final four-day prelaunch training for the mission, which included familiarization activities, rehearsal of emergency procedures and practice on NASA's Shuttle Training Aircraft, along with a simulated countdown, which took place on the morning of November 16, 2006. The astronauts then traveled to Johnson Space Center in Houston, Texas, and returned to Kennedy Space Center on December 3, 2006, four days before the planned launch date.
The payloads for the mission, including a SPACEHAB module and the P5 truss, were loaded from the payload canister into "Discovery's" payload bay on November 16, and, with the sealing of the payload bay doors, all that remained was to fill the external fuel tank before the "Discovery" shuttle stack was in full launch configuration. With the completion of the Flight Readiness Review over November 28–29 (which evaluated all activities and elements necessary for the safe and successful performance of the shuttle during the mission, including the Orbiter itself, the payload and flight crew), "Discovery" was given her Certificate of Flight Readiness, the launch date was officially set to December 7, 2006, and the mission officially given the "Go" for launch.
Mission timeline.
December 7 (Launch attempt 1).
Following the completion of the pre-launch preparations, all eyes were on the Florida skies, due to a forecast low cloud ceiling for the night of the launch. The mission's seven astronauts were loaded into "Discovery" ready for the scheduled launch at 21:37 EST, with hopes high for a break in the clouds, but as the scheduled launch time approached it became apparent that the cloud would not break, and the launch attempt was scrubbed, with the next attempt scheduled for December 9, 2006.
Prior to the initial attempt on December 7, NASA had determined that they would not attempt a launch on Friday because of a cold front moving in that eventually scrubbed Thursday's launch attempt.
December 9 (Flight day 1 – Launch).
"Discovery" lifted off successfully at 8:47 pm EST (01:47 UTC), lighting up the Florida's coastline. Weather conditions – in particular crosswinds at the launch and landing sites – continued to trend positively in the hours approaching the launch window Saturday night. The fueling process for Discovery's external tanks began at 12:46 EST (17:46 UTC) and was completed at approximately 15:45 EST (20:45 UTC). If a transatlantic abort landing (TAL) had been required during ascent, the shuttle had three possible landing sites: Zaragoza or Morón Air Base in Spain, or Istres, France.
The launch was the third shuttle mission in five months, being preceded by STS-121 in July and STS-115 in September, and was the first night launch in four years since STS-113 and first night launch following the Columbia accident during STS-107. It is also the last time a shuttle launched from LC-39B.
December 10 (Flight day 2).
Flight day 2 began for the astronauts at 15:47 UTC. The first order of business for the day was a thorough inspection of the Shuttle. Using sensors and cameras attached to a fifty-foot boom, which was in turn connected to a fifty-foot robotic arm, Nicholas Patrick inspected the leading edge of the wings and the nose cap. The process, which took five and a half hours, suffered a minor glitch that required Patrick to order the arm to manually grab the boom. During this time, the crew also inspected the upper surface of the orbiter. Astronauts also completed a check of the spacesuits to be used during the mission, along with preparation for docking with the International Space Station.
December 11 (Flight day 3 – Docking to ISS).
Flight day 3 began for the astronauts at 15:18 UTC. Following the rendezvous pitch maneuver, docking to the International Space Station occurred at 22:12 UTC. The hatch between the International Space Station and "Discovery" was opened at 23:54 UTC. The joint ISS/Shuttle crew then worked to undertake some further detailed inspection of the orbiter and unloaded the P5 truss segment from the payload bay, handing it off successfully from the shuttle robotic arm to the station arm. The astronauts scheduled for Day 4's EVA, Robert Curbeam and Christer Fuglesang, ended their day by entering the airlock for a "campout" sleep session to prepare for the EVA by purging their bodies of nitrogen in a lower-pressure environment. Such a practice is common in order for the astronauts to avoid getting decompression sickness.
December 12 (Flight day 4 – EVA #1).
Flight day 4 began for the astronauts at 15:47 UTC. During the first EVA of the mission, the astronauts of STS-116 brought the ISS one step closer to completion with the addition of the P5 truss segment.
The EVA began at 20:31 UTC, with Curbeam and Fuglesang removing launch restraints from the P5 truss and Mission Specialist Joan Higginbotham making use of the station's robotic arm (the "Canadarm2") to move the truss segment to within inches of its new position on the P4 truss. The spacewalkers then guided Higginbotham with visual cues as the precise operation to finalize the attachment of the truss was completed.
After the P5's attachment, Curbeam and Fuglesang finalized the installation with power, data and heater cable connections. They also replaced a faulty video camera attached to the S1 truss. Since they worked ahead of the time-line, the two astronauts were also able to complete some get-ahead tasks.
At the end of the spacewalk, Curbeam congratulated the Nobel Prize winners, including scientist Dr. John C. Mather at NASA's Goddard Space Flight Center in Greenbelt, Maryland. Mather was honored for his work on the big-bang theory. Christer Fuglesang also held a short speech in Swedish, encouraging Swedes and others to aspire to become future astronauts. The EVA concluded at 03:07 UTC on the morning of December 13, and lasted for 6 hours and 36 minutes in total.
During the spacewalk, after taking a close look at imagery gathered on the first three days of the flight, mission managers determined that the shuttle's heat shield would support a safe return to Earth. They also decided a more detailed inspection that had been scheduled for later in the mission would not be necessary.
Three more spacewalks, one of which was unplanned, were required to reconfigure and redistribute power on the station, so that the solar arrays installed during STS-115 could be used. The first step of reconfiguring the power took place Wednesday when the port solar array on the P6 truss was retracted, which allowed the activation and rotation of the Solar Alpha Rotary Joint on the P4. The rotary joint allows the solar arrays on the P4 to track the Sun.
The astronauts were required to spend the night sleeping in protected areas in order to avoid radiation from a solar flare eruption.
December 13 (Flight day 5 – Solar Array Reorganization).
Flight day 5 began for the astronauts at 15:21 UTC. The most high-profile activity was the attempted retraction of the P6 port-side solar array. The process began at 18:28 UTC, but problems with the array folding due to 'kinks' and 'billows' led the controllers to redeploy the array (from about 40% retracted). There then followed a series of more than 40 commands to furl and unfurl the arrays in an effort to get them properly aligned and folded.
At 00:50 UTC, the retraction efforts were abandoned for the day. The problems, which appear to have been caused by a loss of tension in the solar array guide wires, had still not been solved,