Astronauts Install Seventh Upgraded Solar Array on Space Station
NASA astronauts successfully unfurled a new solar panel to boost station power capacity.
1Successful Solar Array Installation
NASA astronaut Anil Menon and Canadian Space Agency astronaut Joshua Kutryk completed a seven-hour and 11-minute spacewalk on October 29. They successfully installed the seventh of eight new IROSA solar panels. This mission ensures the International Space Station remains powered through its planned retirement in 2030, marking a significant infrastructure milestone.
2Boosting Station Power Capacity
The new IROSA arrays are designed to increase the station's total power generation from 160 kilowatts to approximately 215 kilowatts. Each individual array adds 8 kilowatts of capability. By mounting these smaller, efficient panels in front of aging original wings, NASA improves overall energy output by up to 30 percent.
3Precision Spacewalk Execution
The spacewalkers operated ahead of schedule, allowing them to complete additional preparatory tasks for the final installation on November 5. Menon utilized the Canadarm2 robotic arm to maneuver the 750-pound array into position at the P4 truss work site. Mission Control confirmed the operation was essentially flawless throughout the entire duration.
4Orbital Night Constraints
Cable connections between the new array and the station's power system required precise timing during orbital darkness. Because the station's existing panels generate electricity in sunlight, the team performed critical wiring tasks while the complex was in Earth's shadow. They successfully mated three connectors before the station re-entered the sunlight.
5Deployment via Stored Energy
The 60-foot solar array unfurled automatically without the need for motors, relying on energy stored in carbon-fiber composite booms. Similar to a snap bracelet, the panel extended steadily over ten minutes. Engineers confirmed the array was safe to deploy after the initial three power connections were secured by the astronauts.
6Astronaut Experience and Roles
Joshua Kutryk, who arrived at the station on October 1, became the fifth Canadian to perform a spacewalk. Anil Menon, on his fourth excursion, brought his total spacewalking time to over 26 hours. Their success relied on precise coordination with Jessica Watkins and Luke Delaney, who operated the robotic arm from inside.
7Historical Context of Upgrades
The original solar wings were delivered by space shuttles between 2000 and 2009 with a 15-year design life. Rather than replacing the legacy hardware, NASA chose to augment them with IROSA technology. This strategy has been refined since the first array was installed in June 2021, following initial deployment challenges during that mission.
8Final Mission Preparations
The eighth and final solar array is scheduled for installation on November 5. Astronauts will employ a maneuver called the leapfrog to transport the hardware to the starboard end of the truss. This final step will conclude the current power upgrade project, ensuring the station remains fully operational until its 2030 decommissioning.
Original article: Spaceflight Now — Astronauts Install Seventh Upgraded Solar Array on Space Station