JPSS-1 (NOAA-20) – Delta II 7920-10C – Vandenberg SLC-2W – 18.11.2017

[tnt22]

11/15/2017 10:45

The current weather conditions at Space Launch Complex 2-West are observed "green," and are forecast to remain acceptable for launch throughout the countdown. There is a 0 percent chance of violating the Delta 2's launch weather constraints.

The outlook for launch time calls for high clouds at 24,000 feet, unrestricted visibility, winds from the east at 6 to 9 knots, and a temperature in the upper 40s to lower 50s Fahrenheit.

[tnt22]

NASA_LSP‏Подлинная учетная запись @NASA_LSP 11 мин. назад

#DeltaII guidance system alignment is currently in progress. #JPSS1

[tnt22]

NASA_LSP‏Подлинная учетная запись @NASA_LSP 7 мин. назад

#DeltaII guidance system turn on is complete.

[tnt22]

:!:

NASA_LSP‏Подлинная учетная запись @NASA_LSP 6 мин. назад

Launch time for #DeltaII #JPSS1 launch has been established for 1:47:36 PST (4:47:36 EST)

[tnt22]

NASA_LSP‏Подлинная учетная запись @NASA_LSP 1 мин. назад

NLM (NASA Launch Manager) Omar Baez reported that the NASA LSP team is ready for cryogenic loading. #DeltaII #JPSS1

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 3 мин. назад

The launch team has been directed to begin first stage liquid oxygen loading for the Delta II rocket. The count is continuing with no technical issues

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 1 мин. назад

Cryogenic liquid oxygen, chilled to Minus-298 degrees F, has started flowing into the Delta II rocket.

[tnt22]

Derrick.Stamos‏ @Helodriver2004 7 ч. назад

Sunset over SLC-2W. @NASASpaceflight #JPSS1 #nasa

[tnt22]

Tory Bruno‏Подлинная учетная запись @torybruno 1 мин. назад

20 min into LOX loading. All good

[tnt22]

11/15/2017 11:29

The liquid oxygen tank on the Delta 2 rocket's first stage is now full. Liquid oxygen will continue flowing into the tank throughout the countdown to replace the super-cold oxidizer as it naturally boils away. The liquid oxygen loading operation in today's countdown took 25 minutes, 18 seconds.

With the completion of liquid oxygen tanking, the Delta 2 rocket now stands fully fueled for launch with the JPSS 1 weather satellite at 1:47:35 a.m. PST (4:47:36 a.m. EST; 0947:36 GMT) from Vandenberg Air Force Base, California. RP-1 fuel was loaded into the first stage earlier in the countdown, and the second stage received its blend of Aerozine 50 and nitrogen tetroxide hypergolic propellants earlier in the launch campaign. The nine solid rocket boosters came with their propellants pre-packed.

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 44 сек. назад

The half-million-pound Delta II rocket now stands fully fueled for its mission to launch the #JPSS1 polar-orbiting weather observatory

[tnt22]

Spaceflight101 LIVE‏ @S101_Live 2 мин. назад

L-1 Hours 15 Minutes: #DeltaII now stands fully fueled for launch, coming up on oxidizer fill/drain valve cycle tests and a pressure integrity check on the first stage.

[tnt22]

https://img.novosti-kosmonavtiki.ru/170847.jpg

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 3 мин. назад

Today's mission is the 378th Delta rocket launch since 1960, the 236th with NASA involvement. It's the 154th Delta II vehicle since 1989 and 53rd for NASA

[tnt22]

T -1 час

[tnt22]

Spaceflight101 LIVE‏ @S101_Live 2 мин. назад

L-1 Hour! #DeltaII has been well behaved through its tanking sequence, now working through engine steering checks and a final round of RF link checks. Weather is favorable for tonight's attempt.

[tnt22]

Spaceflight Now‏ @SpaceflightNow 3 мин. назад

Less than one hour until launch. This morning's launch will mark the 378th Delta rocket launch since 1960, and the 154th Delta 2 flight since 1989. Only one more Delta 2 mission is planned after today. https://spaceflightnow.com/2017/11/13/delta-2-jpss-1-mission-status-center/ ...

[tnt22]

11/15/2017 11:52

The launch team is beginning the "slew" or steering checks of the first and second stage engines. These are gimbal tests of the nozzles on the first stage main engine and twin vernier engines and second stage engine to ensure the rocket will be able to steer itself during launch.

Testing of the Delta 2's flight termination system, which would be used to end the flight in the event of a mishap, was also accomplished in the last few minutes.

[tnt22]

11/15/2017 11:58

The first and second stage steering checks have been accomplished. The launch team is now verifying good telemetry and data links with the Delta 2 rocket.

[tnt22]

Tory Bruno‏Подлинная учетная запись @torybruno 1 мин. назад

He and GN2 decay checks complete and acceptable