The first launch of Orbital ATK’s redesigned Antares rocket since an engine failure doomed a mission in 2014 will likely be delayed more than one month until August to complete analysis of data acquired during a first stage hotfire test, officials said.

NASA is gearing up for an intense few weeks of work aboard the International Space Station, staging three spacewalks, moving a docking port from one module to another to support commercial crew ferry ships and capturing an Orbital ATK Cygnus cargo ship carrying nearly 4 tons of equipment and supplies.

Two communications payloads — one for Intelsat and another for Europe’s data relay satellite system — lifted off from French Guiana aboard an Ariane 5 rocket at 1930 GMT (3:30 p.m. EDT) Tuesday.