Russian rocket technicians planned to swap out a failed inertial measurement unit inside a Soyuz rocket overnight Sunday after a failure in the navigation system forced officials to abort the booster’s planned launch of five satellites from French Guiana.

A European Ariane 5 rocket climbed off its launch pad in French Guiana with nearly 3 million pounds of thrust Thursday, carrying two communications satellites to orbit for the Japanese military and British-based Avanti Communications.

After three frustrating days of weather delays, the United Launch Alliance Atlas 5 rocket blasted off from Cape Canaveral at 4:44 p.m. EST (2144 GMT) today to send Orbital ATK’s commercial Cygnus cargo freighter to the International Space Station.