Author Topic: ISS US EVA-74 (Read 24362 times)

centaurinasa · « **Reply #20 on:** 06/16/2021 10:37 am »

https://ntrs.nasa.gov/api/citations/20190032191/downloads/20190032191.pdf

centaurinasa · « **Reply #21 on:** 06/16/2021 10:44 am »

Rondaz · « **Reply #22 on:** 06/16/2021 10:47 am »

.@NASA TV is live now as astronauts @astro_kimbrough and @Thom_astro are prepping to begin a spacewalk at 8am ET today to install and deploy the first new solar array.

https://twitter.com/Space_Station/status/1405112450261860354

eeergo · « **Reply #23 on:** 06/16/2021 11:17 am »

Appropriate Beta Gimbal Assemblies (BGAs) now locked, port SARJ not tracking, and 2B power channel shunted, in preparation for the installation work:

https://twitter.com/Ian_Benecken/status/1405106356865142784

Spacewalkers deep into prebreathe and ISLEs.

SMS · « **Reply #24 on:** 06/16/2021 11:24 am »

Quote

SPACE STATION CREW MEMBER DISCUSSES SPACEWALK TO UPGRADE STATION POWER

Aboard the International Space Station, Expedition 65 Flight Engineer Shane Kimbrough of NASA discussed a pair of spacewalks he and crewmate Thomas Pesquet of ESA (European Space Agency) are scheduled to make June 16 and 20 to begin the installation of new ISS roll-up solar arrays (IROSAs) that will augment the power supply of the orbital outpost for the remainder of its lifetime. The first array of this initial pair of power generators, launched on the SpaceX Cargo Dragon flight two weeks ago, will be installed on the first of two spacewalks by Kimbrough and Pesquet on the far port truss of the station (P6 truss) to upgrade the power output for the station’s 2B power channel. A second spacewalk by Kimbrough and Pesquet will install the second roll-up array on the P6 truss for the 4B power channel. Four more arrays will be installed next year to complete the upgrades

centaurinasa · « **Reply #25 on:** 06/16/2021 11:33 am »

Quest's internal hatch closed

centaurinasa · « **Reply #26 on:** 06/16/2021 11:39 am »

Flight Director & Ground IV (and ISS capcom Drew Feustel)

centaurinasa · « **Reply #27 on:** 06/16/2021 12:06 pm »

https://twitter.com/esaspaceflight/status/1405129276815466500

centaurinasa · « **Reply #28 on:** 06/16/2021 12:11 pm »

External hatch open à 12.09 UTC

centaurinasa · « **Reply #29 on:** 06/16/2021 12:14 pm »

EMUs on internal power at 12.11 UTC

centaurinasa · « **Reply #30 on:** 06/16/2021 12:15 pm »

https://twitter.com/cbs_spacenews/status/1405136432172240901

centaurinasa · « **Reply #31 on:** 06/16/2021 12:18 pm »

EV-1 egress with Crew Lock Bag 1.

Rondaz · « **Reply #32 on:** 06/16/2021 12:20 pm »

Watch Spacewalkers Install New Solar Arrays on Wednesday

Mark Garcia Posted on June 15, 2021

NASA astronaut Shane Kimbrough and ESA (European Space Agency) astronaut Thomas Pesquet are scheduled to exit the International Space Station’s Quest airlock Wednesday for a spacewalk to install and deploy the first of six new solar arrays to help power the orbiting laboratory.

Live coverage of the spacewalk will air on NASA Television, the agency’s website, and the NASA app beginning June 16 at 6:30 a.m. EDT, with the crew members scheduled to set their spacesuits to battery power about 8 a.m., signifying the start of their spacewalk.

During the planned six-and-a-half hour spacewalk, Kimbrough and Pesquet will work on the far end of the left (port) side of the station’s backbone truss structure (P6) to upgrade the 2B power channel with the installation and deployment of an ISS Roll-Out Solar Array (iROSAs).

Two of the new solar arrays arrived at the station in the SpaceX Dragon cargo spacecraft as part of the company’s 22nd commercial resupply services mission to the station. On June 10, operators in the Mission Control Center at NASA’s Johnson Space Center used the station’s robotic Canadarm2 to extract the solar arrays from Dragon’s trunk in preparation for the installation. On Sunday, June 20, Kimbrough and Pesquet will install the second array to upgrade the 4B power channel on the P6 truss.

The new solar arrays will augment the existing arrays, which are functioning well but have begun to show signs of expected degradation as they have operated beyond their designed 15-year service life. The first pair of solar arrays were deployed in December 2000 and have been powering the station for more than 20 years.

This will be the 239th spacewalk in support of space station assembly. Pesquet will be extravehicular crew member 1 (EV 1), with red stripes on his spacesuit, while Kimbrough will be extravehicular crew member 2 (EV 2), with an unmarked suit. Canadarm2 will be used to maneuver the arrays into place, commanded from inside the station by NASA astronaut Megan McArthur with NASA astronaut Mark Vande Hei serving as backup.

The spacewalks will be the seventh and eighth for Kimbrough, and the third and fourth for Pesquet. The pair arrived for a six-month science mission at the space station April 24 with NASA’s SpaceX Crew-2 mission aboard the Crew Dragon Endeavour.

Watch a video providing an overview of the spacewalk and learn more about station activities by following the space station blog, @space_station and @ISS_Research on Twitter as well as the ISS Facebook and ISS Instagram accounts.

https://blogs.nasa.gov/spacestation/2021/06/15/watch-spacewalkers-install-new-solar-arrays-on-wednesday/

Rondaz · « **Reply #33 on:** 06/16/2021 12:21 pm »

.@NASA astronaut @astro_kimbrough and @esa astronaut @Thom_astro switched their spacesuits to battery power at 8:11am ET to officially begin their spacewalk, which is expected to last about six and a half hours.

https://twitter.com/Space_Station/status/1405137997322989576