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over a period of four spacewalks in 2015

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NASA astronauts laid the groundwork for

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the installation of the first

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international docking adaptor or IBA on

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the international space station the

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first three spacewalks were conducted by

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butch Wilmore and Terry Virts who

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unfurled hundreds of feet of power and

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data cables needed for not only one but

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two docking adapters that will serve as

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future docking ports for us Commercial

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Crew spacecraft in development by SpaceX

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and Boeing Saturday February 21st 2015

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focused on pressurized mating adapter or

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PM a number two to which space shuttles

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used to dock and we're the first idea is

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being attached as the primary docking

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port for the first commercial crew

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flights working on the forward end of

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the harmony module will more invert

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splayed out 10 different cables in some

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of the most labor-intensive work in

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station history after unfurling the

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first eight cables and prepping the last

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two for the next spacewalk the crew

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members called it a day four days later

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on February 25th the pair headed back

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outside and routed the remaining cables

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2 p.m. a 2 with their primary job

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complete the pair split up for

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additional station maintenance tasks

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including preparations for the

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relocation of the permanent

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multi-purpose module as part of the

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reconfiguration of the station to

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after another four-day breather will

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more invert suited up one final time to

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install the common communications for

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visiting vehicles for c2v2 system a

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relay system for data and communications

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between approaching Commercial Crew

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vehicles and the station itself working

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in tandem the NASA space Walker's

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hoisted two antennas on the station's

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truss structure before routing for

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separate 100-foot cables to a single

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connector located on the US Destiny

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laboratory then last December right

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before Christmas astronauts Scott Kelly

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and Tim copra took up the cause routing

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yet another cable that will be used for

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the installation of the second of a

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docking adapters to the space facing

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side of Harmony the two docking ports

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will provide redundant parking spaces

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for US Commercial Crew vehicles that

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will augment the transportation of

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astronauts to and from the orbital

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outpost and the expansion of research