Resident Crews of the International Space Station (ISS)

ISS: Expedition 26

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alternate crew photo

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Crew, launch- and landing data

No.: 1 2 3 4 5 6
Nation:
Surname:  Kelly  Kaleri  Skripochka  Kondratiyev  Coleman  Nespoli
Given names:  Scott Joseph  Aleksandr Yuriyevich  Oleg Ivanovich  Dmitri Yuriyevich  Catherine Grace "Cady"  Paolo Angelo
Position:  ISS-CDR  Flight Engineer  Flight Engineer  Flight Engineer  Flight Engineer  Flight Engineer
Spacecraft (Launch):  Soyuz TMA-01M  Soyuz TMA-01M  Soyuz TMA-01M  Soyuz TMA-20  Soyuz TMA-20  Soyuz TMA-20
Launch date:  07.10.2010  07.10.2010  07.10.2010  15.12.2010  15.12.2010  15.12.2010
Launchtime:  23:10 UTC  23:10 UTC  23:10 UTC  19:09 UTC  19:09 UTC  19:09 UTC
Spacecraft (Landing):  Soyuz TMA-01M  Soyuz TMA-01M  Soyuz TMA-01M  Soyuz TMA-20  Soyuz TMA-20  Soyuz TMA-20
Landingdate:  16.03.2011  16.03.2011  16.03.2011  24.05.2011  24.05.2011  24.05.2011
Landingtime:  07:54 UTC  07:54 UTC  07:54 UTC  02:26 UTC  02:26 UTC  02:26 UTC
Mission duration:  159d 08h 44m  159d 08h 44m  159d 08h 44m  159d 07h 17m  159d 07h 17m  159d 07h 17m
Orbits:  2509  2509  2509  2508  2508  2508

unofficial Backup Crew

No.: 1 2 3 4 5 6
Nation:
Surname:  Volkov  Kononenko  Garan  Ivanishin  Fossum  Furukawa
Given names:  Sergei Aleksandrovich  Oleg Dmitriyevich  Ronald John, Jr.  Anatoli Alekseyevich  Michael Edward  Satoshi
Position:  ISS-CDR  Flight Engineer  Flight Engineer  Flight Engineer  Flight Engineer  Flight Engineer

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Expedition Report

Launch from the Baikonur Cosmodrome (Dmitri Kondratiyev, Paolo Nespoli and Catherine Coleman with Soyuz TMA-20). Scott Kelly, Aleksandr Kaleri and Oleg Skripochka were onboard since October 10, 2010 (arrival with Soyuz TMA-01M).

ESA astronaut Paolo Nespoli's mission to the space station was named MagISStra. The name combines the word magistra, meaning "female teacher" in Latin, with the acronym "ISS", as suggested by Antonella Pezzani of Italy.

The first EVA by Dmitri Kondratiyev and Oleg Skripochka occurred on January 21, 2011 (5h 23m) to complete installation of a new high-speed data transmission system, remove an old plasma pulse experiment, install a camera for the new Rassvet docking module and retrieve a materials exposure package.

On January 27, 2011 the Japanese cargo module HTV-2 "Kounotori 2" arrived at the International Space Station and was attached by Catherine Coleman and Paolo Nespoli using the station's Canadarm2 robotic arm.
Kounotori 2 was initially scheduled to launch on January 20, 2011, but this was postponed for two days due to a bad weather forecast. The H-IIB rocket with Kounotori 2 onboard was successfully launched from Tanegashima Space Center on January 22, 2011, 05:37:57 UTC. It made its rendezvous with the space station for a subsequent docking to the Harmony node's nadir port on January 27, 2011.
Kounotori 2 carried 5.3 tons of cargo to ISS, consisting of 4 tons in the Pressurized Logistics Carrier (PLC) and 1.3 tons in the Unpressurized Logistics Carrier (ULC). Cargo in the PLC consists of spare system components (51% of cargo weight), food (24%), science experiment materials (10%), crew commodities (8%), and water (7%). It included the Kobairo (Gradient Heating Furnace) rack and a Multipurpose Small Payload Rack (MSPR). The Gradient Heating Furnace is a high-temperature electrical furnace that will be used to generate large scale, high-quality crystals from melting materials. The MSPR is a multipurpose rack that will be used for many different functions. The rack consists of three main components - a Work Volume, a Work Bench, and a Small Experiment Area. One experiment that is already planned for the Work Volume, to be launched on a later flight, is the Aquatic Habitat, which will be used to breed small fish in order to study their responses to microgravity and cosmic radiation. Once Kounotori 2 was berthed to the ISS, both Kobairo and the MSPR were transferred into the Japanese Pressurized Module. The installation and commissioning of these racks will initiate the 2nd phase of the Japanese Experiment Module (JEM) utilization. Kounotori 2's Unpressurized Logistics Carrier (ULC) carried an EP (Exposed Pallet) with two US ORUs (Orbital Replacement Units) attached: an FHRC (Flex Hose Rotary Coupler) and CTC-4 (Cargo Transportation Container-4). Both the FHRC and CTC-4 were transferred from Kounotori 2's EP to the space station's ELC-4 using the ISS's manipulator "Dextre".
Space shuttle mission STS-133 arrived while Kounotori 2 was berthed to ISS. To avoid interference with the payload bay of the shuttle, Kounotori 2 was relocated from Harmony Nadir port to Zenith port. This was done on February 18, 2011, before the launch of STS-133. After space shuttle Discovery departed the International Space Station and the STS-133 mission was completed, on March 10, 2011, the ISS crew robotically relocated Kounotori 2 back to the nadir port of the Harmony module. The moving operation began at 11:49 UTC. The spacecraft was attached to the Common Berthing Mechanism (CBM) at Harmony's Earth facing nadir port at 16:19 UTC.
After an extended two-month stay, on March 28, 2011, Kounotori 2 was detached from the docking port by robotic hand at 15:29 UTC and released at 15:46 UTC. It reentered to the Earth atmosphere at around 03:09 UTC on March 30, 2011.

Progress M-09M was launched on January 28, 2011 at 01:31:39 UTC. The Progress spacecraft maneuvered to rendezvous with the space station. It arrived at the ISS on January 30, 2011, successfully docking to the nadir port of the Pirs at 02:39 UTC.
Progress M-09M was carrying 2,666 kilograms (5,878 lb) of cargo to the space station, consisting of 1,444 kilograms (3,183 lb) of dry cargo, 752 kilograms (1,658 lb) of propellant, 50 kilograms (110 lb) of oxygen and 420 kilograms (930 lb) of water. Of the fuel aboard the spacecraft, 250 kilograms (550 lb) are reserved for orbital maneuvers whilst docked, such as raising or lowering the station's orbit, whilst the remaining 502 kilograms (1,107 lb) will be used for refueling the station itself. The dry cargo aboard Progress M-09M includes parts for the oxygen and water supply systems and the thermal control system, as well as equipment for hardware control and the station's electrical and telemetry systems. Also aboard the spacecraft is 147 kilograms (324 lb) of equipment for conducting scientific research aboard the station. For the crew, food, medical and hygiene equipment will also be delivered, as well as documentation and personal items including books by Konstantin Tsiolkovsky and a birthday present for station commander Scott Kelly. The Kedr miniaturised satellite was delivered to the ISS aboard Progress M-09M. It is an amateur radio satellite which will be deployed from the station during an EVA on February 16, 2011. The satellite will be operated by RSC Energiya, and is part of the RadioSkaf program. It is intended to commemorate the fiftieth anniversary of the Vostok 1 mission.
Progress M-09M was undocked from the Pirs module at 11:41 UTC on April 22, 2011. After departing the space station, the spacecraft was used for Radar-Progress scientific experiment to investigate a reflection feature of the plasma generated by operations of the Progress propulsion. Upon the completion of this experiment the spacecraft was deorbited, and reentered over the "spacecraft cemetery" in the South Pacific ocean. The deorbit maneuver was performed on April 26, 2011, with debris falling into the ocean at 13:23 UTC.

The second and final EVA was performed again by Dmitri Kondratiyev and Oleg Skripochka on February 16, 2011 (4h 51m) to install two experiments. One will collect information useful in seismic forecasts and earthquake predictions, and the second will look at gamma splashes and optical radiation during terrestrial lightning and thunderstorms. The spacewalkers also retrieved a pair of panels exposed to space as part of an experiment to identify the best materials for building long-duration spacecraft. The cosmonauts also deployed an experiment called ARISSat-1, or Radioskaf-V, a boxy 57-pound nanosatellite that houses congratulatory messages commemorating the 50th anniversary of Yuri Gagarins launch to become the first human in space.

The Johannes Kepler ATV, or Automated Transfer Vehicle 002 (ATV-002), was an unmanned cargo spacecraft built to resupply the International Space Station (ISS). It was launched on February 16, 2011 by the European Space Agency (ESA). Johannes Kepler carried propellant, air and dry cargo weighing over 7,000 kilograms (15,000 lb), and had a total mass of over 20,000 kilograms (44,000 lb), making it, at the time, the heaviest payload launched by the ESA. The spacecraft was named after the 17th-century German astronomer Johannes Kepler. Johannes Kepler delivered the GeoFlow II hydrodynamics experiment container to the ISS. This experiment was designed to observe liquid movements in microgravity, and compare them with computer simulations, thus helping scientists to understand convection currents within the Earth's mantle.
Johannes Kepler was the second ATV cargo resupply vehicle to be launched, following the Jules Verne mission of 2008. Johannes Kepler carried around five tons more cargo than Russia's Progress-M resupply spacecraft, and about 1.5 tons more than the Japanese HTV. The ATV used 4,500 kilograms (9,900 lb) of fuel to boost the ISS's altitude from 350 to 400 km.
Docking with the ISS was completed on February 24, 2011 at 15:59 UTC, after a 15-minute delay. The spacecraft traveled over eight days to catch up with the space station, and arrived at the aft port of the station's Zvezda service module. During the rendezvous operations, ATV-2 traveled a total of 2.5 million miles. The docking occurred as ATV-2 and the ISS flew over the coast of Liberia in western Africa. Hooks and latches engaged a few minutes later to firmly attach ATV-2 to the ISS. It undocked from the ISS on June 20, 2011. Johannes Kepler performed a destructive re-entry as intended on June 21, 2011, with its remains impacting the Pacific Ocean.


On February 26, 2011 Space Shuttle STS-133 docked with the International Space Station.
The mission STS-133 (ISS-ULF-5 / ELC-4) transported several items to the space station, including the Permanent Multipurpose Module Leonardo, which was left permanently docked to one of the station's ports. The shuttle also carried the third of four ExPRESS Logistics Carriers to the ISS, as well as a humanoid robot called Robonaut.

The Permanent Multipurpose Module (PMM) is a large, reusable pressurized element, carried in the space shuttle's cargo bay, originally used to ferry cargo back and forth to the station. For STS-133, the PMM, known as Leonardo, was modified to become a permanent module attached to the International Space Station. Once in orbit, the PMM will offer 2,472 additional cubic feet of pressurized volume for storage and for scientific use. The module is carried in the cargo bay of Discovery and will be connected to the Unity node on the station.
To transform an existing logistics carrier used for 10 years into a permanent module able to stay an additional 10 years in orbit, modifications consisted of the following:
Enhance the module shielding with an improved micrometeoroid debris protective shield design to satisfy the new penetration requirements.
Provide the in-orbit maintenance capability by changing the internal harness routing and brackets layout to allow the crew accessibility to the internal equipment.
Provide easy interfaces for future exploitation of the retained resources.
Provide a certified life extension for all equipments and subsystems.
Develope a software update to eliminate faulty alarms.
The Italian Space Agency contracted with Thales Alenia Space, which also designed and built the three multi-purpose logistic modules, to make the modifications. This module flew seven times as Leonardo, the multipurpose logistics module. As the PMM module, this will be its final flight and the last pressurized element to be added to the U.S. operating segment (USOS) of the station.
On the STS-133 mission, the PMM will carry 14 racks to the station - one experiment rack, six resupply stowage platforms (RSPs), five resupply stowage racks (RSRs), and two integrated stowage platforms (ISPs).

The Express Logistics Carrier (ELC) is a platform designed to support external payloads mounted to the International Space Station starboard and port trusses with either deep space or Earth-ward views. Each pallet spans the entire width of the shuttle's payload bay, can carry science experiments and serves as a parking place for spare hardware that can be replaced robotically once in space. For STS-133, Discovery will carry the ELC-4 to the station to be positioned on the starboard 3 (S3) truss lower inboard passive attachment system (PAS). ELC-1 and ELC-2 were placed on the station's truss structure during STS-129. ELC-1 is mounted on the port 3 (P3) truss element unpressurized cargo carrier attachment system (UCCAS) while ELC-2 is placed on the S3 truss upper outboard PAS.
The weight of ELC-4 is approximately 8,161 pounds. Remmele Engineering, based in Minneapolis, built the integral aluminum ELC decks for NASA. Engineers from NASA Goddard Space Flight Center's carriers development office developed the lightweight ELC design, which incorporates elements of both the express pallet and the unpressurized logistics carrier. Orbital Science Corporation built the ELC.
The ELC is designed to be carried in the space shuttle cargo bay to the station, fully integrated with cargo. Four ELCs will be attached to the station before the scheduled retirement of the space shuttle. Two ELCs will be attached to the S3 and two ELCs will be mated to the P3. By attaching at the S3/P3 sites, a variety of views such as deep space or Earthward directions with a combination of forward or aft pointing allows for many possible viewing opportunities. Cargo stationed on the ELC will be exposed to the microgravity and vacuum environments of space for extended periods of time while docked to the station, unshielded from incident radiation and orbital debris.

Robonaut 2, the latest generation of the Robonaut astronaut helpers, is set to launch to the space station aboard space shuttle Discovery on the STS-133 mission. It will be the first humanoid robot in space, and although its primary job for now is teaching engineers how dexterous robots behave in space, the hope is that through upgrades and advancements, it could one day venture outside the station to help spacewalkers make repairs or additions to the station or perform scientific work. R2, as the robot is called, will launch inside the Leonardo Permanent Multipurpose Module, which will be packed with supplies and equipment for the station and then installed permanently on the Unity node. Once R2 is unpacked - likely several months after it arrives - it will initially be operated inside the Destiny laboratory for operational testing, but over time, both its territory and its applications could expand. There are no plans to return R2 to Earth.

Space Shuttle Discovery also carried the Developmental Test Objective (DTO) 701B payload using Advanced Scientific Concepts, Inc.'s DragonEye 3D Flash light intensification detection and ranging (LIDAR) sensor. The addition of the pulsed laser navigation sensor was the third time a space shuttle has provided assistance to the commercial space company SpaceX, following STS-127 and STS-129. The DragonEye on STS-133 incorporated several design and software improvements from the version flown on STS-127 to provide increased performance. Its inclusion on STS-133 was part of a final test run ahead of being fully implemented on SpaceX's Dragon spacecraft, which had its maiden flight in December 2010.
The navigation sensor provides a three-dimensional image based on the time of flight of a single laser pulse from the sensor to the target and back. It provides both range and bearing information from targets that can reflect the light back such as the pressurized mating adapter 2 (PMA-2) and those on the station's Japanese Kibo laboratory.
The DragonEye DTO was mounted onto Discovery's existing trajectory control system carrier assembly on the orbiter's docking system. SpaceX took data in parallel with Discovery's Trajectory Control Sensor (TCS) system. Both the TCS and DragonEye "looked" at the retroreflectors that are on the station. After the mission, SpaceX compared the data DragonEye collected against the data collected by the TCS to evaluate DragonEye's performance.

Following docking the hatches were finally opened at 21:16 UTC, and the Expedition 26 crew greeted the crew of STS-133.
Later this day Michael Barratt and Nicole Stott used the station's robotic arm to pluck Express Logistic Carrier 4 from the shuttle cargo bay and hand it off to the shuttle's arm, operated by Alvin Drew and Eric Boe. After moving the base of Canadarm2, the shuttle arm was to hand ELC-4 back for installation on the Earth-facing side of the station's starboard truss. There it will be used for stowage of spare parts, including a spare radiator launched aboard Discovery.
ELC-1 and 2 were placed on the station's truss structure during STS-129. ELC-1 is mounted on the lower inboard position on the port side of the station. ELC-2 is on the upper outboard side of the starboard truss, right next to where the Alpha Magnetic Spectrometer will be installed on STS-134. That mission also will deliver ELC-3, which will be the final logistics carrier installed on the station. It will be positioned on the upper outboard attachment point on the port side.

On flight day 4, Nicole Stott and Michael Barratt grappled the Orbiter Boom Sensor System (OBSS) using the Canadarm2 and removed it from the starboard sill of Discovery's payload bay. Once it was grappled and out of the payload bay, the Shuttle Remote Manipulator System (SRMS) grappled the end of the OBSS and took a hand off from the Canadarm2. The OBSS was grappled by the space station arm, because the SRMS could not reach it due to clearance issues, and it needed to be moved out of the way so that the Permanent Multipurpose Module (PMM) could be removed from the payload bay. After the OBSS hand off, the entire STS-133 crew was joined by ISS Expedition 26 Commander Scott Kelly and Flight Engineer Paolo Nespoli for a series of in-flight media interviews. The crew also completed more cargo transfers to and from the ISS. Throughout the day, Alvin Drew and Steve Bowen prepared tools that they would use on their spacewalk on flight day 5. Later in the day, they were joined by the shuttle crew and ISS Commander Scott Kelly and Flight Engineer Paolo Nespoli, for a review of the spacewalk procedures. After the review, Stephen Bowen and Alvin Drew donned oxygen masks and entered the crew lock of the Quest airlock for the standard pre-spacewalk campout. The airlock was lowered to 10.2 psi for the night. This was done to help the spacewalkers purge nitrogen from their blood and help prevent decompression sickness, also known as the bends.

The first EVA by Stephen Bowen and Alvin Drew occurred on February 28, 2011 (6h 34m). They installed a power extension cable between the Unity and Tranquility nodes to provide a contingency power source should it be required. The spacewalkers moved the failed ammonia pump module that was replaced in August 2010 from an attachment bracket to a stowage platform adjacent to the Quest airlock. Alvin Drew and Stephen Bowen installed a piece of hardware that will go under a camera on the truss. The hardware will tilt the camera to provide clearance for a spare part to be installed on a future mission. They next replaced a guide for the rail cart system used for moving cargo along the truss. The guides were removed when the astronauts were performing work on the station's starboard Solar Alpha Rotary Joint, which rotates the solar arrays to track the sun.
Of course, one of the primary goals of STS-133 was to deliver the new Permanent Multipurpose Module (PMM), to the space station. But before it could be attached to the Unity node, an extension cable must be installed on the J612 cable. The cable, which powers secondary airlock heaters, was inaccessible after the PMM is installed in its current state. The extension cable will make any future replacements of the system that might be necessary easier.
Installing the extension cable took Stephen Bowen and Alvin Drew about 30 minutes. To do so, Stephen Bowen removed dust caps from the cable and released some wire ties currently holding the J612 cable in place. Then, he disconnected the original cable from the Unity node and connected the extension cable in its place, before tying down the extension cable. Alvin Drew, meanwhile, connected the extension cable to the original cable, which runs to the Quest airlock. He also worked to secure the cables in place.
From there, Stephen Bowen moved to the external stowage platform 2, where a foot restraint was waiting for him to attach it to the space station's robotic arm. On it, Stephen Bowen moved to the payload orbital replacement unit accommodation (POA), which is basically one of the robotic arm "hands" without the arm, used to temporarily store equipment. In this case, the equipment was the pump module that failed over the summer 2010. To remove the pump module from the POA, Stephen Bowen installed a handle on the module and then had the robotics officers release the POA's hold on it. He carried the module back to the external stowage platform, which was its long-term storage location.
While Stephen Bowen retrieved the module, Alvin Drew retrieved from the port truss' crew equipment and translation aid, (CETA), cart a tool that was used to remove remaining ammonia from the pump module.
Stephen Bowen and Alvin Drew worked together to secure the pump module. Four bolts were installed to hold it in place. They also installed the tool Alvin Drew retrieved - called the vent tool - for use on the second spacewalk.
Once that task was over, Stephen Bowen climbed off of the robotic arm. While he did so, Alvin Drew moved to a piece of the station's truss near the center of the system - the Z1 segment - where he folded back two flaps of insulation on a remote power control module, relocated a tool stanchion and retrieved another foot restraint, this one to store inside the airlock.
Afterward, Stephen Bowen and Alvin Drew came back together to install a camera wedge on a video camera on the first starboard segment of the station's truss. The wedge gave the camera added clearance that it will need once the ExPRESS Logistics Carrier 4 that Discovery delivered is installed nearby.
To install the wedge, Alvin Drew removed the camera's stanchion by removing one bolt. The wedge was secured to the truss using a bolt, and then the stanchion bolted back onto the wedge.
The spacewalkers then moved together further down the starboard truss to the solar alpha rotary joint at the starboard three segment. There, they were installing two extensions to the station's mobile transporter track, which will allow the mobile transporter to travel the entire length of the track with the CETA cart and still reach all the worksites. Each extension (one on either rail of the track) was secured by two bolts.
Alvin Drew and Stephen Bowen wrapped up their work at S3 by pushing two "stops" out of the way on the rails - one meant to keep the mobile transporter from passing and one meant to keep a spacewalker's tether from passing.
The last task for the first spacewalk of the mission was for Stephen Bowen and Alvin Drew to participate in the Japan Aerospace Exploration Agency activity called Message in a Bottle. They opened and filled a metal cylinder that was signed by other astronauts who have flown in space. The bottle then was returned to the ground for public display.

On March 01, 2011 Michael Barratt and Nicole Stott inched the 58-foot-long space station robotic arm onto a grapple fixture on the Permanent Multipurpose Module (PMM). The arm lifted the fully-loaded 28,353 pound PMM from space shuttle Discovery's cargo bay and carry it to the Earth-facing port on the Unity node, where it will be permanently attached.

The second and final EVA was performed by Stephen Bowen and Alvin Drew on March 02, 2011 (6h 14m). The astronauts removed thermal insulation from a platform, while Stephen Bowen swapped out an attachment bracket on the Columbus module. Stephen Bowen then installed a camera assembly on the Dextre robot then removed insulation from Dextre's electronics platform. Alvin Drew installed a light on a cargo cart and repaired some dislodged thermal insulation from a valve on the truss then removed other insulation from Tranquility. The final task was to "fill" a special bottle with space for a Japanese education payload. The bottle will be part of a museum exhibit for public viewing.
The second spacewalk of the mission included one more task to finish up the work with the failed pump module. That task - removing the remaining ammonia from the pump module - took Alvin Drew about an hour. The balance of the two spacewalker's six and a half hours scheduled outside the station was spent on the assorted tasks originally assigned to the STS-133 mission.
The pump module work was first up on Alvin Drew's timeline. As the vent tool was been installed on the first spacewalk, Alvin Drew simply had to open the vent and wait about two minutes for ammonia to be vented out to space. (The tool allows it to vent without contaminating Alvin Drew's spacesuit with ammonia.) Once it was done, he removed the tool and took it back to the Quest airlock.
Meanwhile, Stephen Bowen was climbing back into the foot restraint on the station's robotic arm. He rode the robotic arm to the end of that module to pick up a lightweight adapter plate assembly, which was used to attach experiments to the exterior of Columbus. Stephen Bowen stored it on the sidewall carrier in the shuttle's cargo bay to return home with Discovery. This task was originally scheduled for STS-131, but canceled due to time constraints. Stephen Bowen needed to remove one bolt to retrieve the plate and install one bolt to secure it in the cargo bay.
Alvin Drew removed some insulation from the avionics assembly on the new ExPRESS Logistics Carrier 4 and retrieved three sets of stowage bags from the CETA cart on the port side of the station's truss system.
The spacewalkers continued to work separately throughout the rest of the spacewalk. The robotic arm flew Stephen Bowen to the special purpose dexterous manipulator, or Dextre. There, he installed a second camera (using one bolt) on the robot and removed an unnecessary insulation blanket, while Alvin Drew installed a light on the port CETA cart. To install the light, Alvin Drew disconnected a cable on a stanchion on the CETA cart and connected it to the new light, then drove one bolt to hold it in place.
From there, Alvin Drew travelled to a radiator beam on the first port segment of the truss and installed insulation on its valve module fluid line. He also spent some time troubleshooting a radiator grapple fixture stowage beam. The beam, which was originally installed on STS-131, was used temporarily to store handles that would be necessary if a radiator ever needed to be replaced. However, during its installation, the astronauts noticed the beam was looser than they expected. Experts on the ground think this might be because the two bolts securing it did not seat properly or were misaligned.
So, to fix that, Alvin Drew was releasing the two bolts and redriving them.
Afterward, Alvin Drew moved to the Tranquility node to remove some insulation covering electrical connectors. In the meantime, Stephen Bowen had gotten off the robotic arm. Since he was in the vicinity, his next task was to install a lens cover on the camera on the arm's elbow joint. The cover will protect the lens from any erosion that might be caused by the thruster plume of visiting vehicles that the arm is used to dock. It is attached using a lever that locks it into place.
The rest of the spacewalk was spent installing similar covers on other cameras. Stephen Bowen installed one of Dextre's cameras (the one he did not install earlier in the spacewalk). And Alvin Drew's last tasks were to install a lens cover on the POA's camera.

On March 07, 2011 STS-133 undocked and moved to a distance of about 450 feet, where Eric Boe began to fly around the station. Discovery circled the shuttle around the station at a distance of 600-700 feet.
Once the shuttle completed 1.5 revolutions of the complex, Eric Boe fired Discovery's jets to leave the area. The shuttle began to increase its distance behind the station with each trip around the earth while the crew conducted one last inspection of the heat shield using the Orbiter Boom Sensor System.
The distance was close enough to allow the shuttle to return to the station in the unlikely event that the heat shield is damaged, preventing the shuttle's safe re-entry.


During the stay on board of the ISS the crews of Expeditions 25 / 26 carried out the following scientific experiments:
3D-Space (Mental Representation of Spatial Cues During Space Flight),
ALTEA-Dosi (Anomalous Long Term Effects in Astronauts' - Dosimetry),
ALTEA-Shield (Anomalous Long Term Effects in Astronauts' Central Nervous System - Shield),
ARISS (Amateur Radio on the International Space Station),
Bar (Choice and Development of Methods and Instruments to Detect the Location of a Loss of Pressurization of a Module on ISS),
BCAT-5-3D-Melt (Binary Colloidal Alloy Test - 5: Three-Dimensional Melt),
BCAT-5-Compete (Binary Colloidal Alloy Test - 5: Compete),
BCAT-5-PhaseSep (Binary Colloidal Alloy Test-5: Phase Separation),
BCAT-5-Seeded Growth (Binary Colloidal Alloy Test - 5: Seeded Growth),
BCAT-6-Colloidal Disks (Binary Colloidal Alloy Test - 6 - Colloidal Disks),
BCAT-6-Phase Separation (Binary Colloidal Alloy Test - 6 - Phase Separation),
BCAT-6-PS-DNA (Binary Colloidal Alloy Test - 6: Polystyrene - Deoxyribonucleic Acid),
BCAT-6-Seeded_Growth (Binary Colloidal Alloy Test - 6: Seeded Growth),
Biodegradation (Initial stage of Biodegradation and Biodeterioration in Space),
Biological Rhythms (The Effect of Long-term Microgravity Exposure on Cardiac Autonomic Function by Analyzing 24-hours Electrocardiogram),
Bisphosphonates (Bisphosphonates as a Countermeasure to Space Flight Induced Bone Loss),
CCF (Capillary Channel Flow),
CEO (Crew Earth Observations),
CFE-2 (Capillary Flow Experiment - 2),
CFS-A (Growth and Survival of Colored Fungi in Space),
CVB (Constrained Vapor Bubble),
DECLIC-ALI (DEvice for the study of Critical LIquids and Crystallization - Alice Like Insert),
DECLIC-DSI (DEvice for the study of Critical LIquids and Crystallization - Directional Solidification Insert),
DOSIS-DOBIES (Dose Distribution Inside ISS - Dosimetry for Biological Experiments in Space),
DTN (Disruption Tolerant Networking for Space Operations),
EarthKAM (Earth Knowledge Acquired by Middle School Students),
EKE (Assessment of Endurance Capacity by Gas Exchange and Heart Rate Kinetics During Physical Training),
EPO-Demos (Education Payload Operation - Demonstrations),
FLEX (Flame Extinguishment Experiment),
FLEX-2 (Flame Extinguishment Experiment - 2),
Functional Task Test (Physiological Factors Contributing to Changes in Postflight Functional Performance),
Hair (Biomedical Analyses of Human Hair Exposed to a Long-term Space Flight),
HREP-HICO (HICO and RAIDS Experiment Payload - Hyperspectral Imager for the Coastal Ocean),
HREP-RAIDS (HICO and RAIDS Experiment Payload - Remote Atmospheric and Ionospheric Detection System (RAIDS)),
HydroTropi (Hydrotropism and Auxin-Inducible Gene expression in Roots Grown Under Microgravity Conditions),
Hypersole (Cutaneous Hypersensitivity and Balance Control in Humans),
Impuls (Impulse),
Integrated Cardiovascular (Cardiac Atrophy and Diastolic Dysfunction During and After Long Duration Spaceflight: Functional Consequences for Orthostatic Intolerance, Exercise Capability and Risk for Cardiac Arrhythmias),
Integrated Immune (Validation of Procedures for Monitoring Crewmember Immune Function),
ISS Ham Radio (International Space Station Ham Radio),
Izgib (Effect of Performance of Flight and Science Activities on the Function of On-Orbit Systems on ISS (Mathematical Model)),
JAXA EPO 6 (Japan Aerospace Exploration Agency Education Payload Observation 6),
Kids In Micro-g-2 (Kids In Microgravity-2 (2010-2011)),
Kontur (Development of a System of Supervisory Control Over the Internet of the Robotic Manipulator in the Russian Segment of ISS),
Kristallizator (Crystalization of Biological Macromolecules and Generation of Biocrystal Film in the Conditions of Microgravity),
Lactolen (Influence of Factors of Space Flight on Lactolen Producer Strains),
MABE (Microheater Array Boiling Experiment),
MAI-75 (Space Devices and Modern Technology for Personal Communication),
Matryeshka-R (Matryeshka-R),
MAUI (Maui Analysis of Upper Atmospheric Injections),
MAXI (Monitor of All-sky X-ray Image),
MISSE-7 (Materials International Space Station Experiment - 7),
Mouse Immunology-2 (Effect of Space Flight on Innate Immunity to Respiratory Viral Infections),
Myco-2 (Mycological Evaluation of Crew Exposure to ISS Ambient Air - 2),
NanoRacks-CubeLabs Module-10 (NanoRacks-CubeLabs_Module-10),
NanoRacks-CubeLabs Module-1 and -3 (NanoRacks-CubeLabs Module-1 and -3),
NanoRacks-CubeLabs Module-9 (NanoRacks-CubeLabs Module-9),
Neurospat (Effect of Gravitational Context on EEG Dynamics: A Study of Spatial Cognition, Novelty Processing and Sensorimotor Integration),
NLP-Cells-6 (National Laboratory Pathfinder - Cells - 6: Jatropha - 3),
NLP-Vaccine-MRSA (National Laboratory Pathfinder - Vaccine - Methicillin-resistant Staphylococcus aureus),
Nutrition (Nutritional Status Assessment),
Otolith (Otolith Assessment During Postflight Re-adaptation),
PACE (Preliminary Advanced Colloids Experiment: 100X Oil Test Target),
PACE-LMM-Bio (Preliminary Advanced Colloids Experiment - Light Microscopy Module: Biological Samples),
PADIAC (PAthway DIfferent ACtivators),
Passages (Scaling Body-Related Actions in the Absence of Gravity),
Photosynth (PhotosynthTM Three-Dimensional Modeling of ISS Interior and Exterior),
Pilot (Individual Characteristics of Psychophysiological Regulatory Status and Reliaility of Professional Activities of Cosmonauts in Long Duration Space Flight),
Plasma Crystal (Dusty and Liquid Plasma Crystals in Conditions of Microgravity),
Pro K (Dietary Intake Can Predict and Protect Against Changes in Bone Metabolism during Spaceflight and Recovery),
Radioskaf (Creation of Preparation and Launch in the Prcess of Mini -Satellites),
RAMBO-2 (Ram Burn Observations - 2),
Reaction Self Test (Psychomotor Vigilance Self Test on the International Space Station),
Relaksatia (Processes of Relaxation in the Ultraviolet Band Spectrum by High Velocity Interaction of Exhaust Products on ISS),
Repository (National Aeronautics and Space Administration Biological Specimen Repository),
Rusalka (Development of Methods to Determine the Carbon Dioxide and Methane (Greehouse Gases) Content in the Earths Atmosphere from On-Board ISS),
SEDA-AP (Space Environment Data Acquisition Equipment - Attached Payload),
SEITE (Shuttle Exhaust Ion Turbulence Experiments),
SIMPLEX (Shuttle Ionospheric Modification with Pulsed Localized Exhaust Experiments),
Sleep-Long (Sleep-Wake Actigraphy and Light Exposure During Spaceflight-Long),
Sleep-Short (Sleep-Wake Actigraphy and Light Exposure During Spaceflight-Short),
SMILES (Superconducting Submillimeter-Wave Limb-Emission Sounder),
SNFM (Serial Network Flow Monitor),
SODI-Colloid (Selectable Optical Diagnostics Instrument - Aggregation of Colloidal Solutions),
Solar-SOLACES (Sun Monitoring on the External Payload Facility of Columbus - SOLar Auto-Calibrating EUV/UV Spectrophotometers),
Solar-SOLSPEC (Sun Monitoring on the External Payload Facility of Columbus -Sun Monitoring on the External Payload Facility of Columbus -SOLar SPECtral Irradiance Measurements),
SOLO (SOdium LOading in Microgravity),
Sonokard (Physiological Functions (cardio-respiratory) of Humans Using Contactless Methods During Sleep in Long Duration Space Flight),
SPHERES (Synchronized Position Hold, Engage, Reorient, Experimental Satellites),
SPHERES-Zero-Robotics (Synchronized Position Hold, Engage, Reorient, Experimental Satellites-Zero-Robotics),
Spinal Elongation (Spinal Elongation and its Effects on Seated Height in a Microgravity Environment),
Sreda (Examination of the Features of IS as an Environment for Conducting Research),
Ten'-Mayak (Study of Transmit/Receive Radio Signal Conditions in the Russian Segment of ISS Using the World-Wide Ham Radio Network),
Thermolab (Thermoregulation in Humans During Long-Term Spaceflight),
Tipologia (Study of the Typological Characteristis of ISS Crew Operators Activity at the Stages of Long Term Space Flight),
Uragan (Hurricane: Experimental Development of Groundbased System of Monitoring and Predicting the Progression of a Naturally Occurring Technogenic Catastrophe),
Vascular (Cardiovascular Health Consequences of Long-Duration Space Flight),
VCAM (Vehicle Cabin Atmosphere Monitor),
Vektor-T (Study of a High Precision System for Prediction Motion of ISS),
Vessel ID System (Vessel ID System),
Vessel Imaging (Vascular Echography),
VO2max (Evaluation of Maximal Oxygen Uptake and Submaximal Estimates of VO2max Before, During, and After Long Duration International Space Station Missions),
Vzaimodeystviye (Interactions: Monitoring of Space Crew Interactions During Extended Space Flight),
Zag (Ambiguous Tilt and Translation Motion Cues After Space Flight).

ISS Assembly

 

Assembly animation (external link)

Photos

more Earth observation photos

more EVA photos


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Last update on July 05, 2014.