Space freighter undocking set for Friday

September 27, 2012
A picture released by the European Space Agency in 2008 shows the ESA's Jules Verne Automated Transfer Vehicle continuing its relative separation from the International Space Station. The undocking of a supply craft from the ISS will take place Friday after a three-day delay, the ESA said.

The undocking of a supply craft from the International Space Station (ISS) will take place Friday after a three-day delay, the European Space Agency (ESA) said.

The robot freighter should have separated from the ISS on Tuesday, the first step towards a suicide plunge over the South Pacific.

But the operation was postponed because the astronauts sent the craft a wrong identification code, which prevented a datalink from being established, it said.

"Departure of ATV-3 from the ISS is now planned for 28 September, around 2015 GMT," ESA said Thursday on its blog for the (ATV).

Named after a 20th-century Italian physicist, the Edoardo Amaldi is the third of five ATVs that ESA is providing as a partner in the ISS project.

The craft, each the size of a London double-decker bus, are designed to make one-way trips to the station, which currently has three people on board.

They haul up tonnes of food, water, air, equipment and other supplies, navigating their way by the position of the stars and docking automatically.

The ATVs then use onboard engines to provide occasional boosts to the ISS, whose altitude drops because it is in low orbit and dragged by lingering atmospheric molecules.

At the end of their trip, laden with rubbish and human waste, the ATVs detach and several days later burn up in a controlled destruction over the ocean.

After fixing the datalink problem, mission managers scheduled a new departure time for the Edoardo Amaldi for late Thursday, the ESA blog said.

But this was scrapped amid worries that the ISS would have to do an emergency manoeuvre to avoid a dangerous piece of —a shard of an Indian rocket.

Later analysis showed the debris would comfortably miss the ISS, so the undocking was postponed for a second time, to Friday.

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not rated yet Sep 27, 2012
It's sort of freaky how smoothly these ATV missions are going. Good job guys!
not rated yet Sep 27, 2012
when you don;t have to worry about keep humans alive a lot of complications are removed from the equation of getting something into space and manuvering

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