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United Launch Alliance rescheduled Tuesday’s attempt to launch its new Vulcan rocket after a countdown halt at T-4 hours 30 minutes while engineers completed pre-fueling checks. The company later restarted the clock and set a revised liftoff time of no earlier than 8:37 p.m. Eastern, still within the day’s launch window from Cape Canaveral Space Force Station. The slip raises the prospect that Vulcan could take off within minutes of Arianespace’s third Ariane 6 flight, scheduled overnight from the Guiana Space Center in French Guiana, creating an unusual trans-Atlantic dual launch. ULA has a second built-in hold at T-7 minutes and must clear that milestone to proceed with fueling and ignition.
With the delay to Vulcan putting a liftoff at possibly 8:37 PM, there is a chance both Vulcan and Ariane 6 will liftoff simultaneously from Cape Canaveral Space Force Station and the Guiana Space Center respectively
ULA has picked up the countdown and is now ticking towards a launch No Earlier Than 8:37 PM EDT, this time is still subject to change as the countdown approaches the T-7 minute mark. https://t.co/oOyAaCJtbQ
Currently waiting to hear the status of today’s launch attempt for Vulcan. As of now the countdown remains in a hold at T-4:30:00. Teams would need to exit the hold no later than 4:29 PM EDT to launch today, however that would leave them with no room for delay in the window. https://t.co/py0OiCb8SW
