Computer Glitch Delays Cargo Ship's Undocking from Space Station

ATV-3 Nearing the International Space Station
European Space Agency's "Edoardo Amaldi" Automated Transfer Vehicle-3 (ATV-3) nears the International Space Station, on March 28, 2012. (Image credit: NASA)

An unmanned European cargo ship as large as a double-decker bus inside will have to wait a bit longer before leaving the International Space Station due to computer problems, NASA officials say.

The robotic Automated Transfer Vehicle 3 (ATV-3) spacecraft was slated to undock from the space station Tuesday evening (Sept. 25), but a technical glitch with a laptop computer inside the station prevented to orbital departure. The two spacecraft were scheduled to part ways at 6:35 p.m. EDT (2235 GMT).

"We're not undocking today, that's been canceled," a flight controller in Mission Control told the station's three-person crew.  

The computer glitch apparently interrupted signals from a laptop computer inside the station that serves as a command panel for the departing ATV-3 spacecraft. The computer is inside the Russian-built Zvezda module, the rear-most module that serves as the docking port for ATV spacecraft and visiting Russian spacecraft. [Photos: Europe's Robotic ATV Spaceships]

Station commander Sunita Williams of NASA told Mission Control that commands sent from the laptop apparently were not reaching the ATV spacecraft. Engineers are expected to meet early Wednesday to discuss the malfunction and determine when the next undocking attempt can be made, NASA officials said.

The space station's current Expedition 34 crew includes Williams, Japanese astronaut Akihiko Hoshide and Russian cosmonaut Yuri Malenchenko.

The ATV-3 spacecraft, which is also known as Edoardo Almadi in honor of the late Italian physicist of the same name, is the third unmanned cargo ship built by the European Space Agency to send food, water, science gear and other supplies to the International Space Station. The spacecraft launched to the station in late March and delivered 7.2 tons of food to the orbiting lab.

The cylindrical ATV spacecraft are 32 feet long (10 meters) and nearly 15 feet wide (4.5 m). They are disposable spacecraft designed to fly themselves to the space station, and then be jettisoned at mission's end to burn up in Earth's atmosphere somewhere over the Pacific Ocean. The European Space Agency commands the spacecraft from a mission control center in Toulouse, France.

The fourth ATV mission will launch the ATV-4 Albert Einstein to the station in April 2013.  

Europe's ATV vehicles are part of a robotic spaceship fleet that regularly haul supplies to the space station. Russia's unmanned Progress vehicles and Japan's H-2 Transfer Vehicles  have also made delivery flights to the station. NASA has contracted the private spaceflight companies SpaceX, of Hawthorne, Calif., and Orbital Sciences Corp., of Dulles, Va., to build unmanned cargo ships for station deliveries.

SpaceX performed the first test flight to the station using its Dragon cargo ship in May and is expected to launch the first official delivery flight to the orbiting lab on Oct. 7. SpaceX has a $1.6 billion contract with NASA to provide 12 Dragon delivery flights. Orbital Sciences has a $1.9 billion contract with NASA for eight delivery missions using its Cygnus spacecraft.

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Tariq Malik

Tariq is the Editor-in-Chief of and joined the team in 2001, first as an intern and staff writer, and later as an editor. He covers human spaceflight, exploration and space science, as well as skywatching and entertainment. He became's Managing Editor in 2009 and Editor-in-Chief in 2019. Before joining, Tariq was a staff reporter for The Los Angeles Times covering education and city beats in La Habra, Fullerton and Huntington Beach. In October 2022, Tariq received the Harry Kolcum Award for excellence in space reporting from the National Space Club Florida Committee. He is also an Eagle Scout (yes, he has the Space Exploration merit badge) and went to Space Camp four times as a kid and a fifth time as an adult. He has journalism degrees from the University of Southern California and New York University. You can find Tariq at and as the co-host to the This Week In Space podcast with space historian Rod Pyle on the TWiT network. To see his latest project, you can follow Tariq on Twitter @tariqjmalik.