Author Topic: SpaceX Falcon Heavy : Arabsat 6A : LC-39A : April 11, 2019 - DISCUSSION (Read 308861 times)

kevinof · « **Reply #720 on:** 04/19/2019 05:22 pm »

Works out the same. The 5000M ridge starts about 1/3rd the distance out from South Carolina to Bermuda and continues all the way down past the Bahamas and outside the leeward islands. Going north it goes from 3500 off the Georges bank to 5000M about 200miles east. If the top half of the booster is anywhere there then it's gone for good.

Quote from: Thorny on 04/19/2019 05:13 pm

Quote from: kevinof on 04/19/2019 10:53 am
North east of Bermuda? More like 5000 Meters. Least that's what it says on my chart plotter. Not sure of the exact co-ordinates but anywhere N or NE of Bermuda would take you to between 3 and 5K meters in depth.

It was south-southeast of Bermuda, wasn't it?

Rocket Science · « **Reply #721 on:** 04/19/2019 05:26 pm »

Quote from: OxCartMark on 04/19/2019 12:11 am

Quote from: Rocket Science on 04/19/2019 12:01 am
Quote from: sfxtd on 04/18/2019 03:36 pm
I am thinking that the ASDS could use a rocket snare, something analogous to the capture mechanism on the CanadArm end effector, but on a large scale.
Said that myself years back post #2178... Oh well...
https://forum.nasaspaceflight.com/index.php?topic=36326.2160

Don't be so proud or think its a unique thought. The ASDS threads which went on for years were constantly bombarded with suggestions for snares, grabbers, sticky flooring, magnets, big hands, holders, cables, etc. etc. etc. There's no suggestion in that vein that NSF hasn't seen multiple suggestions of. The standard reaction was eye rolling because its so old and unnecessary. But the unnecessaryness was in relation to F9 at the time because SpaceX was telling us that the CG was low relative to the leg spread. Now with FH center core maybe there might be some mild wiggle room to consider something. Or not.

My "grid fin" idea worked out fine... Jealousy is so unbecoming...

jpo234 · « **Reply #722 on:** 05/02/2019 07:17 am »

Quote from: Raul on 04/30/2019 11:16 pm

Satellite Arabsat-6A has successfully reached the final GEO on Monday.

Last orbital element:
2019-021A - ARABSAT 6A - 2019-04-29 17:07 UTC - 35755.06/35970.5km/0.04°

All TLEs in graphical form:

That was pretty fast, wasn't it?

ZachS09 · « **Reply #723 on:** 05/02/2019 12:08 pm »

Quote from: jpo234 on 05/02/2019 07:17 am

Quote from: Raul on 04/30/2019 11:16 pm
Satellite Arabsat-6A has successfully reached the final GEO on Monday.

Last orbital element:
2019-021A - ARABSAT 6A - 2019-04-29 17:07 UTC - 35755.06/35970.5km/0.04°

All TLEs in graphical form:

That was pretty fast, wasn't it?

It was; thanks to the super-synchronous orbit that only required 1,500 m/s of delta-v.

codav · « **Reply #724 on:** 05/02/2019 12:54 pm »

Quote from: ZachS09 on 05/02/2019 12:08 pm

It was; thanks to the super-synchronous orbit that only required 1,500 m/s of delta-v.

You can see the difference between the transfer and final orbits nicely on stuffin.space, as the F9 second stage is still in the original orbit.

hvdh · « **Reply #725 on:** 07/09/2019 06:12 pm »

On June 18, Rick Ambrose of LM tweeted successful in-orbit testing, and hand-over to customer.
A few days afterwards, Arabsat 6A started to drift West slowly, by now already near 30.1°E.
The TLE-based graphs look like an intended relocation, not a loss of control.
There was already a dispute with Avanti that has HYLAS at 31.0°E, that had concerns of mutual interference in Ka-band. Maybe this is solved by simply placing Arabsat 6A a bit further West?