TDRS-M – Atlas V 401 – Канаверал SLC-41 – 18.08.2017 12:29 UTC

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Tory Bruno‏Подлинная учетная запись @torybruno 2 мин. назад

Bird is tanked up, carbo loaded, and champing at the bit. #TDRSM

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08/18/2017 14:14  L-minus 48 minutes
Today's launch uses the 401 version of the Atlas 5 rocket, generating the necessary power to lift the TDRS-M spacecraft into a customized high-perigee geosynchronous transfer orbit.

Спойлер

It is the workhorse configuration of the Atlas 5, and is distinguished by two stages, a four-meter-wide nose cone, no side-mounted solid boosters and a single-engine Centaur upper stage.

The United Launch Alliance Atlas 5 rocket will come off the pad on 860,000 pounds of thrust produced by the RD-180 main engine.

Today's version, with the medium-length nose cone, stands 191 feet tall.
The 401 has flown 36 times before.

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Spaceflight101 LIVE‏ @S101_Live 2 мин. назад

Atlas V flies in its basic 401 config: Common Core Booster 1st stage, Centaur 2nd Stage, no boosters, 4m fairing. http://bit.ly/1Lzxq39 

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NASA_LSP‏Подлинная учетная запись @NASA_LSP 4 мин. назад

#AtlasV booster LO2 plus Centaur LO2 & LH2 tanks are being topped. Cryogenic fluids (i.e. very cold) boil off & must be replenished #TDRSM

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https://img.novosti-kosmonavtiki.ru/165971.jpg

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Chris B - NSF‏ @NASASpaceflight 55 сек. назад

That's a pretty scene on the Florida Today webcast: https://livestream.com/accounts/20522137/events/7660320 ...

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Spaceflight Now‏ @SpaceflightNow 3 мин. назад

#TDRSM will be the 12th satellite of its kind orbited to support tracking and data relay of NASA missions like ISS and Hubble

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Spaceflight101 LIVE‏ @S101_Live 2 мин. назад

The Atlas V Flight Control System is being configured for launch & receives an updated version of the flight software inside L-1 hour.

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08/18/2017 14:31
The fuel-fill sequence for the first stage main engine is underway

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Spaceflight101 LIVE‏ @S101_Live 49 сек. назад

30 Minutes to Launch! Propellant Loading is complete and Atlas V stands fully fueled at SLC-41 as clocks continue to tick down. #TDRSM

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08/18/2017 14:35  Weather is GO
Weather is observed and forecast GO for liftoff at 8:03 a.m. EDT (1203 GMT) today.

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О чем эта тема?

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Spaceflight101 LIVE‏ @S101_Live 57 сек. назад

A functional test of the Propellant Utilization Units on the CCB & Centaur is completed in the run-up to terminal count. #TDRSM

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Spaceflight101 LIVE‏ @S101_Live 1 мин. назад

Flight software upload now in progress. Five minutes to the T-4 hold.

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08/18/2017 14:40
Standing by to go into the final built-in hold.

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08/18/2017 14:43  Countdown in pre-planned hold
T-minus 4 minutes and holding. The countdown has entered the planned 15-minute built-in hold designed to give a bit of margin to deal with any problems. Also during this time, the final readiness polls of the launch team and management members will be performed.