Author Topic: SpaceX Falcon 9 : SES-12 : June 4, 2018 : Discussion  (Read 66364 times)

Offline llanitedave

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Re: SpaceX Falcon 9 : SES-12 : June 4, 2018 : Discussion
« Reply #120 on: 06/07/2018 04:47 pm »
That one looks a lot better than the TESS fairing half that came in earlier.
"I've just abducted an alien -- now what?"

Offline Comga

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Re: SpaceX Falcon 9 : SES-12 : June 4, 2018 : Discussion
« Reply #121 on: 12/27/2018 02:09 pm »
Whole journey of the satellite to the final GEO according to complete TLEs since its deployment 04-Jun-18 in graphical form.

Satellite slowly approaches its final position in slot 95°E.

Ooh!
The Brachistochrone problem in a rotating three dimensional space! 
Minimum time for constant force.
In my youth I might have been able to solve a problem like this.
Nice graphs, Raul!
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Offline mulp

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Re: SpaceX Falcon 9 : SES-12 : June 4, 2018 : Discussion
« Reply #122 on: 12/29/2018 07:34 am »
Is six months to final position typical, planned, asap, or could it have gotten there faster using more fuel?

I've only paid attention to the exciting parts for the most part, only recently wondering why it has been taking cargo and crew so long to get to ISS,  then seeing the Russians have been speeding up the trip to "almost direct".

Seemed to me things were "faster" back in the 60s and 70s.

Offline Alexphysics

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Re: SpaceX Falcon 9 : SES-12 : June 4, 2018 : Discussion
« Reply #123 on: 12/29/2018 11:39 am »
Is six months to final position typical, planned, asap, or could it have gotten there faster using more fuel?

I've only paid attention to the exciting parts for the most part, only recently wondering why it has been taking cargo and crew so long to get to ISS,  then seeing the Russians have been speeding up the trip to "almost direct".

Seemed to me things were "faster" back in the 60s and 70s.

The satellite uses electric propulsion which is veeeeery slow but highly efficient. Other satellites can get to GEO in just a few days with more powerful engines but those are usually less efficient and need much more fuel. It just simply depends on the satellite.

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