Author Topic: SpaceX F9 : Galileo L13 : CCSFS SLC-40 : 17 September 2024 (22:50 UTC)  (Read 29920 times)

Online SPKirsch

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https://twitter.com/SpaceX/status/1836178688230199768
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Falcon 9’s first stage lands on the Just Read the Instructions droneship
« Last Edit: 09/17/2024 11:08 pm by SPKirsch »

Offline FutureSpaceTourist

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Remaining mission milestones:

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03:26:52   2nd stage engine starts (SES-2)
03:27:21   2nd stage engine cutoff (SECO-2)
03:34:22   Galileo L13 deploys

Offline FutureSpaceTourist

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Offline FutureSpaceTourist

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https://twitter.com/julia_bergeron/status/1836180480963551312

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22 missions launched and landed for booster 1067 since it's first mission in June 2021. The Galileo L13 mission has pushed boundaries on the way to space.

@NASASpaceflight stream:
 youtube.com/live/2TBeAMl-a…

Offline jcm

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I haven't seen *any* pictures of these two particular Galileo satellites .... did I miss something?
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Offline LouScheffer

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During the Galileo L12 mission earlier this year, the Falcon 9 booster was expended to provide the additional performance needed to deliver the payload to its orbit. Data from that mission informed subtle design and operational changes, including mass reductions and trajectory adjustments, that will allow us to safely recover and reuse this booster
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The booster reentry trajectory will result in higher heating and dynamic pressure on the booster than many of our historical landings.
Trajectory adjustments and shorter re-entry burn make sense.  But mass reduction?  What could SpaceX cut out?  The only thing I can think of offhand would be a custom lightweight payload attach fitting (PAF).  The Galileo satellites are only 700 kg each, and the standard PAF can support up to 9000 kg (section 3.3) if the center of mass is low.

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I haven't seen *any* pictures of these two particular Galileo satellites .... did I miss something?

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https://x.com/DutchSpace/status/1836209786552996087
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Apart from SpaceX, this was made possible thanks to a lot of work done behind the scenes by @ESA_Tech and @OHB_SE

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Online catdlr

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Now that I have awakened and missed the launch, I can at least post the launch summary video.

Thanks to FST for the great job of posting the updates so I can catch up.




It's Tony De La Rosa, ...I don't create this stuff, I just report it.

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« Last Edit: 09/18/2024 03:48 am by catdlr »
It's Tony De La Rosa, ...I don't create this stuff, I just report it.

Offline jcm

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I haven't seen *any* pictures of these two particular Galileo satellites .... did I miss something?

Well ok, not exactly one of the standard satellite portraits though!
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Jonathan McDowell
http://planet4589.org

Online cpushack

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During the Galileo L12 mission earlier this year, the Falcon 9 booster was expended to provide the additional performance needed to deliver the payload to its orbit. Data from that mission informed subtle design and operational changes, including mass reductions and trajectory adjustments, that will allow us to safely recover and reuse this booster
Quote
The booster reentry trajectory will result in higher heating and dynamic pressure on the booster than many of our historical landings.
Trajectory adjustments and shorter re-entry burn make sense.  But mass reduction?  What could SpaceX cut out?  The only thing I can think of offhand would be a custom lightweight payload attach fitting (PAF).  The Galileo satellites are only 700 kg each, and the standard PAF can support up to 9000 kg (section 3.3) if the center of mass is low.

They may have found the acoustic environment better then expected. Note the Payload fairing has no (or less) acoustic tiles.

Maybe check the pics of the last launch?

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https://twitter.com/SpaceX/status/1836230345462616405
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Deployment of Galileo L13 confirmed.

https://twitter.com/SpaceX/status/1836232949655834800
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Falcon 9 launches our 90th mission of the year.

https://twitter.com/esa/status/1836260766317510893
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Two more #Galileo satellites in orbit!

Galileo satellites 31 and 32 were placed in orbit by a #SpaceX Falcon 9 rocket, launched last night at 00:50 CEST from Cape Canaveral.

ESA, @SpaceX and @OHB_SE's launch campaign activities prepared the satellites for a successful Launch and Early Operations Phase. The satellites have reached their holding point and are undergoing first basic health checks as planned.

In the coming days, the satellites will be manoeuvred to their target positions and all systems will be tested to confirm they are fit for nominal operations.

#Galileo, a truly successful European partnership: financed by the EU, developed by ESA, operated by EUSPA.

(pics: ESA–S.Corvaja/SpaceX)  #EUSpace
« Last Edit: 09/18/2024 05:22 am by FutureSpaceTourist »
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Congratulations to the entire launch campaign team! 🥇👏

Thank you, NSF webcasters!✨️😎

And,
Thanks to FST for the great job of posting the updates so I can catch up.
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I haven't seen *any* pictures of these two particular Galileo satellites .... did I miss something?

Well ok, not exactly one of the standard satellite portraits though!

This is an old ESA video, maybe an older version.  It may help with your question.

It's Tony De La Rosa, ...I don't create this stuff, I just report it.

Offline FutureSpaceTourist

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https://twitter.com/sciguyspace/status/1836216253863620777

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Just want to point out that it's wild the European Union just launched some of its most valuable satellites, two Galileo spacecraft, on a Falcon 9 rocket making its 22nd flight. Unimaginable even two or three years ago.

Online zubenelgenubi

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Launch time to the second?
https://twitter.com/cbs_spacenews/status/1836176374211735758
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William Harwood @cbs_spacenews
F9/Galileo L13: LIFTOFF! At 6:50:49pm EDT (2250 UTC)
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Offline GWR64

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During the Galileo L12 mission earlier this year, the Falcon 9 booster was expended to provide the additional performance needed to deliver the payload to its orbit. Data from that mission informed subtle design and operational changes, including mass reductions and trajectory adjustments, that will allow us to safely recover and reuse this booster
Quote
The booster reentry trajectory will result in higher heating and dynamic pressure on the booster than many of our historical landings.
Trajectory adjustments and shorter re-entry burn make sense.  But mass reduction?  What could SpaceX cut out?  The only thing I can think of offhand would be a custom lightweight payload attach fitting (PAF).  The Galileo satellites are only 700 kg each, and the standard PAF can support up to 9000 kg (section 3.3) if the center of mass is low.

They may have found the acoustic environment better then expected. Note the Payload fairing has no (or less) acoustic tiles.

Maybe check the pics of the last launch?

I suspect that a higher acceleration of the payload was allowed at the end of the 2nd stage burn.
Ballast may have been removed (which could also be fuel), perhaps the 2nd stage engine was operated at full power for longer.
If I look at the total burn time of the 2nd stage, then there was very little or no throttling.
The Merlin-1D vac has ~100t thrust and the satellites are light.

https://x.com/DutchSpace/status/1836209786552996087
Quote
Apart from SpaceX, this was made possible thanks to a lot of work done behind the scenes by @ESA_Tech and @OHB_SE

short calculation:
The second burn of the upper stage was planned for 29 seconds.
The difference between an assumed 160 km x 22922 km orbit and a circular orbit of 22922 km (300 km below Galileo orbit) is about 1462 m/s.
That gives about 50.4 m/s2 (more than 5g) on ​​average! At times more, probably at the end. Depending on the throttle profile of the Merlin engine.
« Last Edit: 09/18/2024 12:48 pm by GWR64 »

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