Author Topic: Ariane 5 (VA247): Hellas-Sat-4/SaudiGeoSat-1 and GSAT 31 (21:01 UTC) Feb 5, 2019  (Read 11039 times)

Offline Steven Pietrobon

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Board is green.

T-6 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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T-5 minutes. Showing integration video.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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T-4 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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T-3 minutes. Talking about launch team.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline worldtimedate

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T-2 Minutes

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T-2 minutes. Cryo arms.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline worldtimedate

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- 7 min “All systems go” report, allowing start of synchronized sequence
- 4 min Tanks pressurized for flight
-1 min Switch to onboard power mode
- 05 s Opening command for the cryogenic arms
- 04 s Onboard systems take over
T-0 Reference time
+ 01 s Ignition of the cryogenic main stage (EPC)
+ 07.05 s Ignition of solid boosters (EAP)
+ 07.3 s Liftoff
+ 12.7 s End of vertical climb, beginning of pitch motion
+ 17.05 s Beginning of roll maneuver
+ 32.05 s End of roll maneuver
+ 2 min 24 s EAP separation
+ 3 min 21 s Fairing jettisoned
+ 7 min 47 s Acquisition by Natal tracking station
+ 8 min 41 s End of EPC thrust phase
+ 8 min 47 s EPC separation
+ 8 min 51 s Ignition of ESC-A stage
+ 13 min 37 s Acquisition by Ascension tracking station
+ 18 min 17 s Acquisition by Libreville tracking station
+ 23 min 00 s Acquisition by Malindi tracking station
+ 25 min 9 s Extinction of ESC-A stage
+ 25 min 11 s Injection
+ 27 min 21 s HS-4/SGS-1 satellite separation
+ 29 min 35 s SYLDA separation
+ 42 min 27 s GSAT-31 satellite separation

Offline Steven Pietrobon

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T-1 minute.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Liftoff!
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.


Offline Steven Pietrobon

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T+1 minute. Into the clouds.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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T+2 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Bosster separation.

T+3 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Fairing separation.

T+4 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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T+5 minutes. Trajectory nominal.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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T+6 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline worldtimedate

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T_5 minutes

Offline Steven Pietrobon

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T+7 minutes. 4.63 km/s.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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T+8 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Core separation.

T+9 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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