Flight controllers isolated the cause of 3 ISS Command and Control computers to switch their roles as primary, backup and standby units.

Image above: The International Space Station is featured in this image photographed by an STS-130 crew member on space shuttle Endeavour after the station and shuttle began their post-undocking relative separation. Image credit: NASA

NASA – Station Spacecraft Communicator Stan Love told Expedition 22 Commander Jeff Williams that the glitches were caused by S-band telemetry software that takes Columbus laboratory data, puts it into packets and sends it to the ground. For now, that particular piece of code will be bypassed and flight controllers will command the remaining systems back to their normal configurations, including KU-band communications.

Because the issue has occupied much of the station crew’s planned off-duty day, Mission Control is giving them Wednesday off.

The joint docked mission between the crews of the International Space Station and space shuttle Endeavour came to an end Friday when the shuttle undocked from the station at 7:54 p.m. EST to begin the voyage back to Earth and a Sunday night landing at the Kennedy Space Center in Florida.

The Expedition 22 and STS-130 crews bid one another farewell, and the hatches between the two spacecraft closed at 3:08 a.m. Friday.

Earlier, the combined crews commemorated the installation of the last components of the U.S. segment of the station with a ribbon-cutting ceremony for Tranquility and the cupola at 11:39 p.m. Thursday.

The STS-130 mission included three spacewalks and the delivery of a connecting module that increased the station’s interior space. Node 3, known as Tranquility, provides additional room for crew members and many of the station’s life support and environmental control systems. Attached to the node is a cupola, which is a robotic control station with six windows around its sides and another in the center that provides a panoramic view of Earth, celestial objects and visiting spacecraft.