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(YouTube)   This is the last launch of a Delta IV heavy carrying NROL-91 from the west coast at Vandenberg Space Force base scheduled for 6:25pm EDT   ( divider line
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284 clicks; posted to STEM » and Discussion » on 24 Sep 2022 at 5:58 PM (10 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook

Watch the LAST Vandenberg launch of the Delta IV Heavy! #NROL-91

United Launch Alliance (ULA) will launch the NROL-91 mission for the National Reconnaissance Office (NRO) atop a Delta IV Heavy. Launching from Space Launch Complex 6 at the Vandenberg Space Force base, in California, this mission will mark the final Delta IV Heavy launch from the west coast and the third-to-last Delta IV Heavy launch ever. ULA is retiring both the Delta and Atlas vehicles in favor of Vulcan, which is scheduled to have its maiden launch in Q1 2023.

Check out our Prelaunch Preview to learn more about this mission! -

00:00 - Intro
03:35 - Prelaunch Preview
10:15 - Q&A
19:23 - ULA Stream Starts
1:03:30 - Go / No-Go Poll
1:10:45 - Lift Off
1:14:50 - Booster Separation
1:16:35 - BECO / Stage Sep / Fairing Sep
1:17:55 - Q&A


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