U.S. Spacewalk 91 Animation - Friday, January 10, 2025

An animation of U.S. spacewalk 91 scheduled for Thurs. Jan. 16, when NASA astronauts Nick Hague and Suni Williams will exit the station’s Quest airlock to replace a rate gyro assembly that helps provide orientation control for the station, install patches for damaged areas of light filters for an x-ray telescope called Neutron star Interior Composition Explorer (NICER) and replace a reflector device used for navigational data on one of the international docking adapters. Additionally, the pair will check access areas and connector tools that will be used for future maintenance work on the Alpha Magnetic Spectrometer. This animation was narrated by spacewalk flight director Nicole McElroy. Join NASA as we go forward to the Moon and on to Mars -- discover the latest on Earth, the Solar System and beyond with a weekly update in your inbox. Subscribe at: https://www.nasa.gov/subscribe

What is said in the film

This is the planned tasks for the RGA and reflector EVA. EV1 exits the airlock first wearing red stripes and EV2 exits second wearing white stripes. The first task in this EVA is to remove and replace RGA 2 in the S-0 truss location. EV1 will be working on the backside of the truss. They will carry the new RGA to the work site, Remove the bolts and connectors, and then pull the old RGA out, Ev2 will be positioned inside the truss to assist with removing the electrical connections, and the bolts.

They will then put the new RGA in place. Once the RGA R&R is complete, EV2 will move to the node two zenith docking port to remove and replace the planar reflector. EV2 will remove three bolts in order to remove the planar reflector. They will then put the new one into its place and bolt it back down. Before leaving the worksite, EV2 will take photos of the new reflector and its surrounding area.

Meanwhile, EV1 will be working on the NICER payload located on the S-3 outboard truss. EV1 will be installing wedge shaped patches from the caddy to cover the damaged areas of the light detectors. Once complete, they will then take photos to confirm the configuration is correct. EV1 will then move to the AMS worksite to move a C2V2 cable to allow access to the payload. Once both crew members meet up at the AMS worksite, EV1 will ingress the truss to access the AMS patch panel and then remove the cloth covering.

EV1 will then do fit checks to determine what connectors are easily accessible for future upgrades. Once complete with their tasks, both crew members will then go back to the airlock and ingress, marking the end of the RGA and Reflector EVA.

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