AFSPC-7/USSF-7: X-37B OTV-6 – Atlas V 501 – CCAFS SLC-41 – 17.05.2020 13:14 UTC

[tnt22]

May 17, 2020 13:51
Centaur LO2 Loading Begins

With the thermal conditioning, or chilldown, now complete, liquid oxygen has started to flow into the Centaur upper stage for today's launch. About 4,150 gallons of liquid oxygen will be loaded into Centaur.

[tnt22]

May 17, 2020 14:14
Atlas LO2 loading begins

Filling of the Atlas V rocket's largest tank has begun. About 48,800 gallons of super-cold oxidizer for the main engine is flowing into the liquid oxygen tank on common core booster first stage.

[tnt22]

 Tory Bruno‏ @torybruno 4 мин. назад

The board is green.  The count is going as smooth as the laminar flow in our propellant feed system. #USSF7

[tnt22]

Вероятность пуска растёт

 Tory Bruno‏ @torybruno 2 мин. назад

80% Pgo!

[tnt22]

May 17, 2020 14:37
Centaur LH2 Loading Begins

The launch team has received the "go" to begin filling the Centaur upper stage with the super-cold liquid hydrogen fuel following chilldown of the system. The Centaur holds about 12,300 gallons of the cryogenic propellant for this mission to space.


Photo by United Launch Alliance

[tnt22]

May 17, 2020 14:44

The countdown is passing T-minus 1 hour. We will be taking the clocks down to T-minus 4 minutes where they will hold for 30 minutes while managers perform the final readiness polls. Liftoff remains targeted for 9:14 a.m. EDT (1314 UTC).

[tnt22]

May 17, 2020 14:49

Flight control final preps are getting underway. This is the steering test pattern run on the Atlas V engine nozzles to ensure proper gimbaling during the ascent.

[tnt22]

 William Harwood‏ @cbs_spacenews 8 мин. назад

A5/X37B: Now 1 hour to launch; fueling is essentially complete; the sky remains overcast

[tnt22]

2-й плановый

May 17, 2020 15:40
Countdown Holding

T-minus 4 minutes and holding. The countdown has entered the planned 30-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.

We remain on schedule for a liftoff at 9:14 a.m. EDT (1314 UTC) from Space Launch Complex-41 at Cape Canaveral.

[tnt22]

May 17, 2020 15:41

All three cryogenic tanks on the Atlas V have been topped off to flight level. That gives us a fully-fueled, 761,457-pound rocket to launch USSF-7 today.

[tnt22]

May 17, 2020 15:45
Weather is GO

Weather is observed and forecast GO for liftoff a half-hour from now, according to the countdown's final planned briefing by weather officer Jessica Williams.

[tnt22]

May 17, 2020 15:47

The Orbital Test Vehicle program patch is emblazoned on the Atlas V rocket's payload fairing. The artwork depicts the X-37B Orbital Test Vehicle orbiting above the Earth.

[tnt22]

May 17, 2020 15:51

The Automatic Determination and Dissemination of Just Updated Steering Terms, better known as the ADDJUST file, is being loaded into the Atlas V rocket's Inertial Navigation and Control Assembly (INCA) flight computer by the flight control operator here at the Launch Control Center. This is the planned steering parameters for the INCA to use based on today's upper level wind conditions.

A series of weather balloons has been launched throughout the countdown from the Range weather station at Cape Canaveral to collect measurements of wind speeds and directions to determine if conditions aloft violate the controllability or structural loads on the rocket during ascent. The balloon data was transmitted to ULA engineers in Denver to select a steering profile that minimizes launch vehicle responses.

[tnt22]

[tnt22]

May 17, 2020 15:54

Today's launch opportunity has two 10-minute windows available for Atlas V to send the X-37B Orbital Test Vehicle into space. The orbital requirements of the mission dictate window timing and duration, and the Atlas V rocket's robust ability can meet those parameters.

The first window opens at 9:14 a.m. and extends to 9:24 a.m. EDT (1314-1324 UTC).

The second window runs from 10:52 to 11:02 a.m. EDT (1452-1502 UTC).

We continue to target the opening moment of the first window for liftoff today.

[tnt22]

[tnt22]

[ОАЯ]

Это не то?
https://www.nasaspaceflight.com/2020/05/ula-atlas-v-launch-sixth-x-37b/

[tnt22]

May 17, 2020 16:01

Weather remains in our favor this morning, no technical issues are being addressed with the launch vehicle or pad systems and we are on schedule for a liftoff at 24 minutes past the hour.

[tnt22]