An unpiloted Russian cargo spacecraft re-docks to the International Space Station

The ISS Progress 47 resupply ship arrived at the station in April and undocked from the Pirs docking compartment July 22. It made its first attempt to re-dock the following day.

A technical problem prevented the spacecraft from reaching the space station, and its computers placed it a safe distance from the orbiting laboratory.

The second attempt early Sunday was successful. Video streamed from Russian mission control reported no problems.

Russian engineers are testing a new automated rendezvous system, called Kurs-NA, for possible use on future Russian spacecraft arriving at the station. The new system will be removed and sent to earth for examination and retooling.

A Russian cargo spacecraft re-docks to the International Space Station.

KOROLEV, RUSSIA (JULY 29, 2012) (NASA TV) - An unpiloted Russian cargo spacecraft re-docked to the International Space Station on Sunday (July 29) at 0110 gmt.