ISS- Expedition 61 Mission patch.
October 17, 2019
NASA is targeting a spacewalk for no earlier than Friday to replace a failed power controller, also known as the battery charge-discharge unit (BCDU). The Expedition 61 crew is adjusting its schedule this week to accommodate the new spacewalk plans at the International Space Station.
Astronauts Christina Koch and Jessica Meir are continuing their preparations for the upcoming excursion. The duo will set their suits to battery power on Friday at 7:50 a.m. when the spacewalk officially starts and exit the Quest airlock. NASA TV begins its live coverage beginning at 6:30 a.m.
Image above: NASA astronauts Jessica Meir (left) and Christina Koch are inside the Quest airlock preparing the U.S. spacesuits and tools they will use on their first spacewalk together. Image Credit: NASA.
The pair in their U.S. spacesuits will venture to the far side of the station on the Port 6 truss structure. Once there, the spacewalkers will take about five-and-a-half hours to replace the failed power regulator with a spare BCDU. The BCDU had been in operation since December 2000 and is due to return to Earth on the next SpaceX Dragon resupply ship for inspection. The device regulates the charge to batteries that collect and distribute power to the station.
Station managers will investigate the loss of the BCDU and reschedule the three battery replacement spacewalks for a future date. In the meantime, the five planned spacewalks to repair a cosmic particle detector, the Alpha Magnetic Spectrometer, are still on the calendar for November and December.
Related links:
NASA TV: https://www.nasa.gov/live
Expedition 61: https://www.nasa.gov/mission_pages/station/expeditions/expedition61/index.html
Quest airlock: https://www.nasa.gov/mission_pages/station/structure/elements/joint-quest-airlock
Truss structure: https://www.nasa.gov/mission_pages/station/structure/elements/truss-structure
Alpha Magnetic Spectrometer (AMS): https://www.nasa.gov/feature/extending-science-in-the-search-for-the-origin-of-the-cosmos
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
Image (mentioned), Text, Credits: NASA/Mark Garcia.
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