SBIRS GEO-5 mission overview booklet (PDF) Standby for SBIRS GEO-5 separation in about eight minutes. Centaur has reignited for a roughly three-and-a-half minute burn. Centaur has completed the first of three burns in today's flight. The Centaur upper stage has ignited its single Aerojet Rocketdyne RL10C-1-1 engine. The two Aerojet Rockedyne AJ-60A solid rocket motors have burned out and been jettisoned. The RD-180 main engine has begun its ignition sequence.ĪJ-60A ignition and liftoff! Go Atlas! Go Centaur! Go SBIRS GEO-5! T-4 minutes and counting to the launch of SBIRS GEO-5 Liftoff is now targeting 17:37 UTC (1:37 PM EDT).Īll stations have been polled and are GO to resume the countdown at T-4 minutes. The built-in hold is being extended to allow more time to top off Atlas V's tanks. This is the final planned hold in today's countdown. This is the first of two planned holds in today's countdown.Īll stations are GO to resume the countdown and begin cryogenic fueling operations.Ĭentaur liquid oxygen loading is now underway.Ītlas V's Common Core Booster is now being loaded with liquid oxygen.Ĭentaur liquid hydrogen loading has begun. Today's launch weather forecast has improved to 90% GO. Today's countdown is underway, at T-6 hours, 20 minutes and counting. There's an 80% chance of acceptable weather for tomorrow's launch attempt. Liftoff is now targeting NET Tuesday, 18 May. Today's launch attempt has been scrubbed due a fault sensor in a ground system. RP-1 is now being loaded into Atlas V's Common Core Booster. The L-2 weather forecast remains 90% GO for launch.Ītlas V's Mobile Launch Platform has begun rolling from the Vertical Integration Facility to the launch pad at SLC-41. The Launch Readiness Review was completed successfully. There's a 90% chance of acceptable launch weather on Monday, 80% on Tuesday. The encapsulated SBIRS GEO-5 satellite was mated to its Atlas V launch vehicle. The Centaur upper stage was stacked on top of Atlas V. Two Aerojet Rocketdyne AJ-60A solid rocket motors were installed on Atlas V's core stage. The Atlas V rocket that will launch SBIRS GEO-5 arrived at Cape Canaveral on ULA's RocketShip.Ītlas V's Common Core Booster was raised upright and installed on the launch stand at SLC-41.
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ULA's webcast will begin at 17:11 UTC (1:11 PM EDT) Updates: Date/Time (UTC) Liftoff is targeting 17:37 UTC (1:31 PM EDT) on Tuesday, 18 May. Visit for official news and updates.Ī United Launch Alliance Atlas V 421 rocket will launch the SBIRS GEO-5 missile warning satellite to GTO, flying from SLC-41 at Cape Canaveral Space Force Station. This subreddit is fan-run and is not officially affiliated with United Launch Alliance. Tory Bruno's October 14th, 2015 and MaAMAs. Check out the FAQ page and subreddit wiki for information about ULA, the EELV program, and much more.
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