QZS-4 (Michibiki No. 4) – H-2A (F36) – Танэгасима – 09.10.2017, 22:02 UTC

Автор triage, 20.08.2017 14:32:40

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tnt22

http://h2a.mhi.co.jp/en/mission/countdown/h2a_f36.html
ЦитироватьOctober 10, 2017 06:01 JST
X-60 minutes

It is 60 minutes before launch. The final countdown operation has started.

< Click image to enlarge >
H-IIA F36 - Final countdown operation has started

tnt22


tnt22

Восход
Цитировать マゲシマン つば九郎に会えた!!‏ @mageshiman1025 12 мин. назад

見事な日の出 頭の中でタラッター タタラー タララー と某刑事ドラマのメロディが。








tnt22

Цитировать10/10/2017 00:48

Minus-13 minutes
. In the final minutes of the countdown, an automated sequencer will control the final crucial steps before launch.
Спойлер
The automatic sequence will begin at T-minus 4 minutes, 30 seconds and computers will pressurize the H-2A's propellant tanks for flight at about T-minus 4 minutes, 20 seconds.

At about T-minus 3 minutes, the launcher will transition to internal battery power and remove external power.

Water will be released onto the launch pad deck beginning at T-minus 73 seconds to help suppress sound and acoustics during the ignition and liftoff. The vehicle's pyrotechnic and ordnance systems will be armed at T-minus 30 seconds and the rocket's guidance system initializes at T-minus 18 seconds. Batteries controlling solid rocket booster ignition are activated at T-minus 15 seconds.

Sparklers underneath the rocket's main engine ignite at T-minus 11.7 seconds to burn off residual hydrogen that could be an explosive hazard at main engine start.
[свернуть]

tnt22

Цитировать10/10/2017 00:50

Engineers are uploading the latest upper level wind data into the H-2A's flight computer. The rocket will use the information to compute a specific steering profile based on the real launch day weather conditions. 
Спойлер
At liftoff, the H-2A will be propelled upward from the launch pad on the power of a single hydrogen-burning LE-7A main engine and two solid rocket motors. The total liftoff thrust of the rocket is approximately 1.4 million force pounds.

The rocket will pitch east from Tanegashima, racing through the speed of sound in less than a minute and reaching an altitude of more than 30 miles in the first two minutes of flight.

After consuming their pre-packed solid propellant, the two strap-on boosters will jettison at about the two-minute point. The 13.1-foot diameter payload shroud will separate at T+plus 4 minutes, 10 seconds after the H-2A rocket ascends above the discernable traces of Earth's atmosphere.

First stage main engine cutoff, stage separation and ignition of the second stage's LE-5B engine will occur nearly seven minutes into the mission. The second stage will burn for nearly six minutes before shutting down at T+plus 12 minutes, 34 seconds.

After a 12-minute coast, the second stage will reignite for a 3-minute burn.

Deployment of the Michibiki 4 satellite is expected at T+plus 28 minutes, 24 seconds.
[свернуть]


tnt22

Цитировать10/10/2017 00:52

Some statistics on today's launch:
    [/li]
  • 36th H-2A launch since 2001
  • 49th H-2 family launch since 1994
  • 22nd launch of the H-2A (202) configuration
  • 5th launch from Tanegashima in 2017
  • 65th space launch attempt worldwide in 2017

tnt22

Цитировать Spaceflight101 LIVE‏ @S101_Live 4 мин. назад

#HIIA will be in operation for 28.5 minutes to send #QZS4 into a highly elliptical transfer orbit. Flight Profile: http://bit.ly/2wGv2Ce 


tnt22

Цитировать10/10/2017 00:57

The automatic countdown sequence has started and the H-2A rocket's propellant tanks will soon be pressurized for flight.

tnt22

http://h2a.mhi.co.jp/en/mission/countdown/h2a_f36.html
ЦитироватьOctober 10, 2017 06:56 JST
Automatic countdown sequence to start

It is 4 minutes and 40 seconds before liftoff. The automatic countdown sequence has started.


tnt22

Цитировать10/10/2017 00:58

The H-2A rocket has switched to internal power.