The United Launch Alliance (ULA) has postponed its Atlas V rocket launch, which will carry a ViaSat communications satellite, from Wednesday to Thursday. The mission, called ViaSat-3 Flight 2, is set to lift off aboard the Atlas V 551 rocket from Space Launch Complex 41 at Cape Canaveral Space Force Station.
"The launch of a United Launch Alliance Atlas V carrying the ViaSat-3 F2 mission is scrubbed for tonight's launch attempt due to an issue encountered while cycling the booster liquid oxygen tank vent valve during final checkouts."
ULA explained that crews discovered the issue about ten minutes before the planned 10:24 p.m. liftoff while performing final system checks. The operation was placed on hold, and an official scrub was announced around 10:50 p.m.
The original launch window opened at 10:24 p.m. Eastern Time and was set to close at 11:08 p.m., allowing a 44-minute opportunity for liftoff. For Thursday, ULA plans to open a slightly adjusted 44-minute window beginning at 10:16 p.m.
The Atlas V 551 rocket stands 205 feet (62.5 meters) tall and is designed to deliver high-capacity satellites into orbit. ULA confirmed that teams will use the extra time to complete necessary technical evaluations before proceeding.
ULA postponed the Atlas V’s ViaSat-3 Flight 2 mission to Thursday after a vent valve issue halted Wednesday’s countdown at Cape Canaveral.