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пятница, 29 марта 2019 г.

Astronauts Ready After Robotics Sets Up Worksite for Friday Spacewalk


ISS – Expedition 59 Mission patch.


March 28, 2019


Astronauts Nick Hague and Christina Koch have configured their spacesuits and reviewed procedures for tomorrow’s spacewalk at the International Space Station. Robotics controllers also readied the Port-4 (P4) truss structure so the spacewalkers can continue battery swaps and power upgrades outside the orbital lab.


Hague and Koch will set their spacesuits to battery power Friday around 8:20 a.m. inside the Quest airlock. They will exit Quest to swap old nickel-hydrogen batteries with new lithium-ion batteries on the P4 truss. NASA TV will begin its live coverage of the scheduled 6.5-hour spacewalk Friday at 6:30 a.m.



Image above: NASA astronaut Nick Hague is tethered to the International Space Station during a six-hour, 39-minute spacewalk to upgrade the orbital complex’s power storage capacity. Image Credit: NASA TV.


Ground specialists in Mission Control remotely commanded the Canadarm2 robotic arm and its “robotic hand” Dextre to set up the P4 worksite throughout week. The fine-tuned robotics maneuvers transferred the batteries between an external pallet and the P4 worksite over several days.


NASA astronaut Anne McClain is tentatively scheduled to join Canadian Space Agency astronaut David Saint-Jacques on April 8 for another spacewalk. The spacewalkers will install truss jumpers to provide secondary power to the Canadarm2.



The International Space Station seen from Soyuz MS-08

Meanwhile, McClain collected her blood and urine samples today for ongoing human research. She spun the samples in a centrifuge and stowed them in a science freezer for later analysis. Saint-Jacques worked on computer electronics maintenance throughout the day.


Expedition 59 commander Oleg Kononenko and Alexey Ovchinin, both of Roscosmos, stayed focused on activities in the station’s Russian segment on Thursday. The duo spent the morning on life support maintenance before checking docked vehicle communications and photographing windows in the Zvezda service module.


NASA TV Broadcasts Live Spacewalk Coverage Friday Morning


Expedition 59 Flight Engineers Nick Hague and Christina Koch will exit the Quest airlock Friday for about 6.5 hours of battery swaps to upgrade the station’s power storage capacity. The duo will set their spacesuits to battery power about 8:20 a.m. EDT Friday signifying the start of their spacewalk. Coverage will begin its live coverage at 6:30 a.m.


Watch the spacewalk on NASA TV and on the agency’s website: http://www.nasa.gov/ntv


This will be the 215th spacewalk in support of space station assembly and maintenance. Hague will be designated extravehicular crew member 1 (EV 1), wearing the suit with red stripes. Koch will be designated extravehicular crew member 2 (EV 2), wearing the suit with no stripes.


Hague and Koch have configured their spacesuits and reviewed procedures for tomorrow’s spacewalk at the space station. Robotics controllers also readied the Port-4 (P4) truss structure so the spacewalkers can continue battery swaps and power upgrades outside the orbital lab.



Image above: NASA astronaut Anne McClain takes a “space-selfie” with her helmet visor up 260 miles above the Earth’s surface during a spacewalk on March 22, 2019. Image Credit: NASA TV.


This is the second battery replacement spacewalks this month. Hague and Koch will work on a second set of battery replacements on a different power channel in the same area of the station from the recent spacewalk on March 22.


During that spacewalk, NASA Flight Engineer Anne McClain and Hague replaced some nickel-hydrogen batteries with newer, more powerful lithium-ion batteries for the power channel on one pair of the station’s solar arrays. The batteries were transported to the station in September aboard the Japanese H-II Transfer Vehicle. The spacewalking work continues the overall upgrade of the station’s power system that began with similar battery replacement during spacewalks in January 2017.


Related links:


Expedition 59: https://www.nasa.gov/mission_pages/station/expeditions/expedition59/index.html


Spacewalk: https://www.nasa.gov/mission_pages/station/spacewalks/


Quest airlock: https://www.nasa.gov/mission_pages/station/structure/elements/joint-quest-airlock


Canadarm2 robotic arm: https://www.nasa.gov/mission_pages/station/structure/elements/mobile-servicing-system.html


Zvezda service module: https://www.nasa.gov/mission_pages/station/structure/elements/zvezda-service-module.html


Port-4 (P4) truss structure: https://cms.nasa.gov/mission_pages/station/structure/elements/truss-structure


H-II Transfer Vehicle: https://cms.nasa.gov/feature/kounotori-htv-launches-arrivals-and-departures


Human research: https://www.nasa.gov/mission_pages/station/research/experiments/explorer/Facility.html?


Space Station Research and Technology: https://www.nasa.gov/mission_pages/station/research/index.html


International Space Station (ISS): https://www.nasa.gov/mission_pages/station/main/index.html


Images (mentioned), Video, Text, Credits: NASA/Mark Garcia/NASA TV/SciNews.


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