Taking advantage of available astronaut time, the International Space Station’s crew will cast off the commercial Orbital ATK Cygnus freighter on Sunday morning nearly six weeks ahead of schedule.

SpaceX launched a Falcon 9 rocket from California’s Central Coast at 10:42:18 a.m. PST (1:42:18 p.m. EST; 1842:18 GMT) Sunday with the Jason 3 oceanography satellite. A secondary objective of the mission to recover the first stage on a barge in the Pacific Ocean failed.

Arianespace’s third Ariane 5 launch of the year was set liftoff Friday from Kourou, French Guiana, but an issue with a sensor on the rocket’s first stage liquid hydrogen tank caused officials to scrub the launch attempt. The Ariane 5 is poised to carry three U.S.-built commercial satellites into orbit, while testing a few rocket upgrades, including a modified fairing needed for the launch of the James Webb Space Telescope next year.