UPDATE (Wednesday): This story has been updated. For the latest update on the launch, click here.
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UPDATE: (Sunday): Vandenberg Space Force Base announced late Sunday afternoon that the COSMO-SkyMed Second Generation mission for the Italian Space Agency and the Italian Ministry of Defense has been rescheduled. A new launch date has not yet been announced. The mission has been delayed to allow extra time for ground system checkouts.
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UPDATE (6:23 p.m.): SpaceX has postponed its Saturday launch. The Falcon 9 launch from Vandenberg Space Force Base is now scheduled to liftoff Sunday at around 6:08 p.m.
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ORIGINAL STORY: A sonic boom advisory has been issued for a SpaceX launch planned for this weekend from Vandenberg Space Force Base.
The aerospace company is targeting Saturday at 6:09 p.m. for liftoff of the COSMO-SkyMed Second Generation mission for the Italian Space Agency and the Italian Ministry of Defense.
If the launch does not happen on Saturday, another opportunity is available Sunday at the same time.
About eight minutes after liftoff, the first stage of the Falcon 9 rocket is expected to land back on Landing Zone 4 at Vandenberg, creating a sonic boom that people in surrounding communities may hear.
It will be the 21st time the first-stage booster has been used.
A live webcast of the launch will begin about 15 minutes before liftoff.
This is the seventh SpaceX launch from Vandenberg this month.
Falcon 9 is vertical at pad 4E in California ahead of today’s launch of the @ASI_Spazio COSMO-SkyMed Second Generation mission. Teams are keeping an eye on winds ahead of liftoff at 6:09 p.m. PT → https://t.co/YRXarcjNrs pic.twitter.com/TU4hnrEpY8
— SpaceX (@SpaceX) December 27, 2025
