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Space station "cable guys" venture out for spacewalk

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One of two spacewalking astronauts can be seen floating upside down at the center of this view showing the forward end of the International Space Station. The astronauts installed power and data cables to support new docking mechanisms that will be used by commercial crew capsules starting in 2017. NASA TV

Last Updated Feb 21, 2015 3:20 PM EST

Astronauts Barry "Butch" Wilmore and Terry Virts floated outside the International Space Station Saturday and installed wiring needed for two new docking mechanisms that will be attached later this year for use by new Boeing and SpaceX crew capsules.

The Boeing-built International Docking Adapters, or IDAs, will allow the commercially developed ferry craft to dock at the front and top of the forward Harmony module starting in 2017. Two other ports on the Earth-facing side of the station will be available for use by U.S. cargo ships.

Floating in the station's Quest airlock module, Wilmore and Virts switched their spacesuits to battery power at 7:45 a.m. EST (GMT-5) to officially begin EVA-29, the 185th spacewalk devoted to station assembly and maintenance since construction began in 1998.

This was the first of three spacewalks by Wilmore and Virts to install more than 760 feet of cabling and to attach new antennas to prepare the space station for eventual dockings by commercial crew capsules. The two additional spacewalks are planned for Wednesday and March 1.

During Saturday's excursion, the spacewalkers spent most of their time working at the front of the station at the forward end of the Harmony module where a docking port extension known as Pressurized Mating Adapter No. 2 is attached. PMA-2 is where visiting space shuttles once docked and where one of the new IDAs will be attached later this year.

After removing micrometeoroid shields from the forward end cone of Harmony, Wilmore and Virts unplugged no-longer-needed cables and installed new power and data lines to support IDA-1. All in all, Wilmore and Virts deployed about 340 feet of cable.

The astronauts also disconnected four cables from the end cone of the Destiny laboratory module that were once used to deliver power to docked space shuttles. New cables will be plugged in later to support the new docking adapters.

With all of their primary objectives completed, Wilmore and Virts returned to the airlock, ending the spacewalk at 2:26 p.m. for a duration of six hours and 41 minutes.

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Space station "cable guys" venture out for spacewalk

Spacewalkers Get Station Ready for New U.S. Spaceships

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Spacewalking astronauts routed more than 300 feet of cable outside the International Space Station on Saturday to prepare for the arrival of new American-made crew capsules. It was the first of three spacewalks planned for NASA astronauts Butch Wilmore and Terry Virts over the coming week.

Altogether, Wilmore and Virts have 764 feet (233 meters) of cable to run outside the space station. They got off to a strong start Saturday, rigging eight power and data lines, or about 340 feet (105 meters). The longest single stretch was 43 feet (13 meters). "Broadening my resume," Virts observed.

NASA considers this the most complicated cable-routing job in the 16-year history of the space station. Equally difficult will be running cable on the inside of the complex.

The extensive rewiring is needed to prepare for NASA's next phase in spaceflight: the 2017 arrival of the first commercial spacecraft capable of transporting astronauts to the orbiting lab. NASA is paying the Boeing Co. and SpaceX to build the capsules and fly them from Cape Canaveral, Florida, which hasn't seen a manned launch since the shuttles retired in 2011. Instead, Russia is doing all the taxi work for upwards of $70 million a seat.

The first of two docking ports for the Boeing and SpaceX vessels still under development is due to arrive in June. Even more spacewalks will be needed to set everything up.

Spacesuit concerns stalled the work by a day. NASA wanted to make certain that the suits worn by Wilmore and Virts had reliable fan and pump assemblies. Two other fan-pump units failed aboard the space station in recent months and were returned to Earth earlier this month for analysis. Corrosion was discovered, the result of water intrusion from testing. The spacewalkers' suits seemed to work fine Saturday.

First published February 21 2015, 8:23 AM

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Spacewalkers Get Station Ready for New U.S. Spaceships

NASA preparing to reassemble International Space Station

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On Friday, astronauts aboard the International Space Station will initiate the station's first reassembly in several years. The station will be reconfigured to create two new docking ports for the space taxis NASA hopes to have launched by the end of 2017 as part of its Commercial Crew program.

The first of three assembly spacewalks will be conducted on Friday by NASA astronauts Barry Wilmore and Terry Virts. While outside the station, they will begin work installing cables and communications equipment for the two new berthing slips.

Wilmore and Virts won't be able to ready the two new ports without new equipment, however. Two International Docking Adapters are needed to turn what were once parking spots for NASA's Space Shuttles into docks capable of accepting future U.S. commercial crew vehicles. The two adapters will be launched by SpaceX resupply missions later this year.

"This is quite a bit of work," Mike Suffredini, NASA's ISS program manager, told Discovery News. "Our plan has always been to have a docking capability in place and operational by the end of 2015 and we're on track to do that."

NASA is anxious to have its space taxis up and operational. Since the Space Shuttle program ended in 2011, NASA has had to rely on Russia to ferry its astronauts to and from the space station. Last year, NASA awarded major contracts to Boeing and SpaceX to construct space taxis.

The combination of space taxis and reconfigured ports will not only make NASA's ISS missions more autonomous, but also bolster their size and scope.

"They will permit the standard station crew size to grow from six to seven, potentially doubling the amount of time devoted to research aboard the orbiting laboratory," NASA officials said in a recent press release.

Friday's spacewalk will be televised by NASA TV. It will be Wilmore's second career spacewalk and the first for Virts.

"SAFER" virtual reality simulator- the jet pack we can use to get back to ISS if we floated away during a spacewalk. pic.twitter.com/Fp2tiwzpqj Terry W. Virts (@AstroTerry) February 18, 2015

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NASA preparing to reassemble International Space Station

Three spacewalks to kick off big year aboard the ISS

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Astronauts Terry Virts, left, and Expedition 42 commander Barry "Butch" Wilmore, right, inside the space station's airlock where they have been readying their suits for three planned spacewalks. The excursions will kick off a busy year of work to ready the station for eventual visits by new U.S. commercial crew ferry ships. NASA TV

NASA space station managers decided Thursday to delay the first two of three planned spacewalks by one day to give flight controllers and engineers a chance to catch their collective breath after exhaustive troubleshooting to verify the health of critical internal spacesuit components.

Expedition 42 commander Barry "Butch" Wilmore and Terry Virts plan to install more than 760 feet of power and data cables needed for new docking mechanisms that will be used by commercial crew ferry ships being built by Boeing and SpaceX. They also plan to install and hook up two sets of antennas, part of a new communications system that will be used by crews approaching and departing the lab complex.

The first spacewalk, originally planned for Friday, will slip to Saturday, starting around 7:10 a.m. EST (GMT-5) and the second outing will move one day to Wednesday. The third EVA remains on track for March 1 as originally planned pending additional review.

The decision to press ahead, albeit with a slight delay, was made after engineers concluded the suits that will be worn by Wilmore and Virts were healthy and not likely to suffer failures due to corrosion like that found in two spacesuit fan/pump/separator assemblies that were returned to Earth for analysis.

The modules in question circulate oxygen and cooling water throughout the spacesuit using a common motor and drive shaft. Each suit also is equipped with an emergency backup system.

After extensive troubleshooting, engineers concluded the drive shaft bearing corrosion seen in the fan assemblies shipped back to Earth likely was the result of additional testing implemented after water backed up into the helmet of spacewalker Luca Parmitano in 2013.

While some bearing corrosion is believed to be present in the fan/pump/separator in Virts' spacesuit, analysis indicates it is well below the threshold that could cause the unit to fail during use. And even if it did, officials said, the astronaut would have more than enough time to get back to the station's airlock using the suit's backup system.

As a result, mission managers cleared the astronauts to proceed after a one-day delay.

"We're not in a big hurry out get out the door on these," said a NASA spokesman. "Twenty four hours will just kind of make life easier."

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Three spacewalks to kick off big year aboard the ISS

Council Rock students talk to astronaut aboard International Space Station

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From almost 250 miles in space, the voice of Italian astronaut Samantha Christoforetti resonated Thursday afternoon through the auditorium of Council Rock High School South in Northampton.

And while her words were hard to hear and often obscured by static, the marvel of being able to communicate with someone traveling 17,100 mph aboard the International Space Station via a Ham radio setup wasnt lost on the students and staff who had gathered for the event.

It was a little fuzzy trying to figure out what she was saying, but just the general idea of being able to talk to someone in space was insane, said Council Rock South senior Jaclyn Timoney, one of seven students who asked questions of Christoforetti.

Jaclyn asked the astronaut how space travel affects economics on Earth. The fact she couldnt clearly hear the answer didnt ruin the experience for the student.

Just the fact of knowing there was an astronaut on the other end was impressive, she said. I still cant believe we were able to do this.

Ten students were scheduled to ask two questions apiece, but only seven questions were asked because the school could maintain contact with the space station for only nine or 10 minutes while it passed over Georgia on its way over Nova Scotia crossing over Pennsylvania on the way said Council Rock science teacher Jerry Fetter.

Some of Christoforettis answers came through more clearly than others.

When a student asked how the space station avoids small meteors and other objects, she said some of it is accomplished through the technical capabilities of the station and the rest through proper navigation and good communication with the ground crew.

I thought the whole thing was really interesting, senior Amanda Ritter said even though she didnt get to ask her question about what type of human impact on Earth is visible from space.

The thought of talking to someone up in space was really cool, Amanda added.

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Council Rock students talk to astronaut aboard International Space Station


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