Author Topic: Ariane 5 - EuropaSat/HellasSat 3 & GSAT-17 - June 28, 2017 (21:20 UTC)  (Read 14287 times)

Online gongora

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Edit/Dec. 2016: Launch vehicle changed from SpaceX Falcon to Ariane 5

Discussion Thread for Falcon Heavy launch with EuropaSat/HellasSat 3.

Resources:

SpaceX News Articles from 2006 (Including numerous exclusive Elon interviews):
http://forum.nasaspaceflight.com/index.php?topic=21862.0

SpaceX News Articles (Recent):
http://www.nasaspaceflight.com/tag/spacex/

=--=

SpaceX GENERAL Forum Section:
http://forum.nasaspaceflight.com/index.php?board=45.0 - please use this for general questions NOT specific to this mission.

SpaceX MISSIONS Forum Section:
http://forum.nasaspaceflight.com/index.php?board=55.0 - this section is for everything specific to SpaceX missions.


If Falcon Heavy actually starts flying around the end of 2016 then this should be the third FH flight.

If Falcon Heavy is delayed much longer then it could switch to Proton - SpaceNews Mar 8 2016: Fearing SpaceX Falcon Heavy delays, Inmarsat reserves ILS Proton

Inmarsat Jul 2 2014: launch contract announcement originally mentioned in this NSF thread Topic: Inmarsat to use SpaceX for satellite launches (mods can merge this over if you need to).

Thales Alenia Space Contract Announcement
Quote
Cannes, June 5, 2014 – Thales Alenia Space announced today that it will construct a powerful telecommunications condominium satellite, Inmarsat S – Europasat / Hellas-Sat 3, for Inmarsat and Hellas-Sat. The satellite will provide Mobile Satellite Services (MSS), Fixed Satellite Services (FSS) and Broadcast Satellite Services (BSS).

The MSS payload is designed to deliver an S-band service across all 28 member states of the European Union; the FSS/BSS coverage zones are Europe, Middle East and Southern Africa. The Inmarsat S – Europasat payload will offer enhanced mobile services across Europe through a hybrid network, which combines S-Band satellite services with a Complementary Ground Component (CGC) infrastructure. Inmarsat S – Europasat will serve the aviation passenger connectivity services, as well as the safety services for Public Protection & Disaster Relief (PPDR) all over Europe. The Hellas-Sat 3 payload will deliver DTH and Telecom services in its designated coverage areas, maintaining and expanding Hellas-Sat business reach with additional capacities.
...
Built on the Spacebus 4000 C4 platform from Thales Alenia Space, Inmarsat S – Europasat / Hellas-Sat 3 will deliver a multi-beam mission in S-band and Ka-band for Inmarsat as well as a powerful Ku/Ka-Band mission of 44 Ku and 1 Ka transponders for Hellas-Sat. The satellite will weigh about 5.9 tonnes at launch and will offer payload power of about 12.3 kW. Inmarsat S – Europasat / Hellas-Sat 3 will be positioned at 39° East.
...

Inmarsat Progress update (found after seeing this tweet from Peter B. de Selding)
Quote
21 July 2016: Inmarsat, the world’s leading provider of global mobile satellite communications, announced today that construction and associated sub-system tests of the satellite for its market-changing European Aviation Network (EAN) in-flight connectivity solution has been completed on schedule by Thales Alenia Space.

The key milestone was achieved on schedule following an extensive two-year build process in Toulouse and Cannes, France. The completed S-band payload module was shipped in early July to Thales Alenia Space’s testing center in Cannes, where satellite integration (‘mating’) was also successfully completed.  The satellite is now undergoing rigorous system end-to-end testing before it is declared ready for flight in 2017.
...
Over the coming months, Inmarsat’s new S-band satellite will be put in a thermal vacuum chamber with no pressure to simulate the space environment and cycled through extreme high and low temperatures to ensure it operates nominally. Mechanical and acoustic testing will then replicate the launch environment, followed by final phase testing to compare any shifts or variations in measurements against the initial base line. Once these tests are complete, the satellite will be prepared for launch by SpaceX at Cape Canaveral in Florida, scheduled to take place in 2017.
...

Satellite under construction [Photo Source: Thales Alenia Space]




EuropaSat/HellasSat 3 on Gunter's Space Page

« Last Edit: 05/19/2017 11:20 AM by Galactic Penguin SST »

Online LM13

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SpaceNews article on delays of HellasSat:

http://spacenews.com/inmarsat-citing-spacex-delays-to-miss-european-deadline-for-aeronautical-broadband-service/

The delays raise the possibility that they will lose rights to some portion of the radio spectrum, but there is also the suggestion that it might go up on Falcon 9 instead of Falcon Heavy.  It would be a later Falcon 9 flight (2Q 2017 vs. 1Q for FH), suggesting that that would be a back-up plan if FH has teething troubles. 

Online hkultala

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So the satellite is of such size that it can be launched with Falcon Heavy while reusing all cores, or can also be launched with F9 on fully expendable mode?


Online Brovane

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So the satellite is of such size that it can be launched with Falcon Heavy while reusing all cores, or can also be launched with F9 on fully expendable mode?

According to this article (https://www.thalesgroup.com/en/worldwide/space/press-release/thales-alenia-space-build-joint-satellite-inmarsat-and-hellas-sat) the Satellite mass will be 5.9 tons at launch.  This would mean that the satellite could be launched by the F9 in full expendable mode.  The F9 in expendable mode could probably put the satellite into super-synchronous orbit to shorten the satellites time to it's final orbit.  Maybe make up a little for all the delays. 
 
"Look at that! If anybody ever said, "you'll be sitting in a spacecraft naked with a 134-pound backpack on your knees charging it", I'd have said "Aw, get serious". - John Young - Apollo-16

Offline Dante80

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This was pretty much expected, SX is behind schedule as far as their manifest is concerned.
 
Quote
We have been talking to SpaceX about different options,” Inmarsat spokesman Christopher McLaughlin said. “It’s never easy to fix a launch date far in advance but as of now it appears that we can get a Falcon Heavy launch in the first quarter of 2017, or a Falcon 9 launch in the second quarter.”
 
This one is interesting. One of the main reasons this payload was booked on FH in the first place is that it was too heavy for DPL with F9. The fact that SX is quoting a F9 FT option for Q2 2017 might mean one of the three following things.
 
1. F9 FT in Q2 2017 will be able to cover this mass and still perform DPL.
2. SpaceX is offering a SES-9 style campaign, with a very small possibility for successful landing to offset the delay.
3. SpaceX is offering an expendable F9 launch with max performance to offset the delay.   
« Last Edit: 08/03/2016 05:42 PM by Dante80 »

Online John Alan

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4. Option 3 with used but nice S1....  ;)

Online Brovane

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This was pretty much expected, SX is behind schedule as far as their manifest is concerned.
 
Quote
We have been talking to SpaceX about different options,” Inmarsat spokesman Christopher McLaughlin said. “It’s never easy to fix a launch date far in advance but as of now it appears that we can get a Falcon Heavy launch in the first quarter of 2017, or a Falcon 9 launch in the second quarter.”
 
This one is interesting. One of the main reasons this payload was booked on FH in the first place is that it was too heavy for DPL with F9. The fact that SX is quoting a F9 FT option for Q2 2017 might mean one of the three following things.
 
1. F9 FT in Q2 2017 will be able to cover this mass and still perform DPL.
2. SpaceX is offering a SES-9 style campaign, with a very small possibility for successful landing to offset the delay.
3. SpaceX is offering an expendable F9 launch with max performance to offset the delay.

Option 3 - When was this contract originally signed?  2014-2015? 

That is one of the great things about the F9 and it's 1st stage recovery.  You have a mission that is beyond the ability to recover the booster but still within the capability of the LV if you discard 1st stage recovery.  Not so long ago, every GTO launch was no go for recovery.  You simply remove the landing hardware and use the LV as a full expendable vehicle.  Their is no expensive investment in manufacturing of the 1st stage to make the stage recoverable and the hardware is removable.  You have essentially the best of both worlds, a recoverable 1st stage that can still be launched as a expendable. 
"Look at that! If anybody ever said, "you'll be sitting in a spacecraft naked with a 134-pound backpack on your knees charging it", I'd have said "Aw, get serious". - John Young - Apollo-16

Offline Kansan52

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"It's launch services not rockets that are being sold" echoes in my mind.

Online wannamoonbase

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FH being delayed till sometime in 2017 and this being Q2 of 17 is tight planning.  Also, if the client won't accept a reused vehicle SpaceX would have to build a fresh FH.  That's a lot of metal to bend and Merlin's to build.

Throw it uphill with an expendable F9 FT+. 

It would be good nostalgia to see an expendable launch.
I know they don't need it, but Crossfeed would be super cool.

Offline guckyfan

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Building a new one is not a problem at that time. They will want a few of them in stock.

Online AncientU

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FH being delayed till sometime in 2017 and this being Q2 of 17 is tight planning.  Also, if the client won't accept a reused vehicle SpaceX would have to build a fresh FH.  That's a lot of metal to bend and Merlin's to build.

Throw it uphill with an expendable F9 FT+. 

It would be good nostalgia to see an expendable launch.

This is an interesting 'feature' of the new FT version, being able to cover for FH on payloads between 5500 and 8300kg.  Earlier it was mentioned that the FH would be cheaper in fully reusable mode than expendable F9, but good to have a back-up capability so payloads like EuropaSat are not lost to others.  The pair of ViaSats at 6400kg fall  nicely into that category.
"If we shared everything [we are working on] people would think we are insane!"
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Online gongora

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This is an interesting 'feature' of the new FT version, being able to cover for FH on payloads between 5500 and 8300kg.  Earlier it was mentioned that the FH would be cheaper in fully reusable mode than expendable F9, but good to have a back-up capability so payloads like EuropaSat are not lost to others.  The pair of ViaSats at 6400kg fall  nicely into that category.

SpaceX is only launching one of the ViaSat satellites.

Offline friendly3

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It would be good nostalgia to see an expendable launch.

Huh? No thanks.

Offline Dante2121

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4. Option 3 with used but nice S1....  ;)

This.  In fact I think we should expect this to become the norm. Use the stage x times then send it up in expendable mode.  X would be 2 here - but will grow to 10+ as everyone gets more comfortable with reuse.

Online wannamoonbase

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It would be good nostalgia to see an expendable launch.

Huh? No thanks.

If you have a contract and you can make a good profit why not?

After all recovery is still experimental.
I know they don't need it, but Crossfeed would be super cool.

Offline friendly3

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I was responding to the "expendable nostalgia" stuff.
« Last Edit: 08/05/2016 08:16 PM by friendly3 »

Online wannamoonbase

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I was responding to the "expendable nostalgia" stuff.

Then, you're really going to dislike the Red Dragon launch when they splash 3 cores.
I know they don't need it, but Crossfeed would be super cool.

Offline stoker5432

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Then, you're really going to dislike the Red Dragon launch when they splash 3 cores.

Musk already confirmed the side cores would be recovered on the Red Dragon mission. He wasn't so sure about the center core, but didn't rule it out.

Online Robotbeat

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...

Then, you're really going to dislike the Red Dragon launch when they splash 3 cores.
We should have a thread devoted to making fun of confident naysayers like this post after they're proven wrong. :)
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Offline Star One

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...

Then, you're really going to dislike the Red Dragon launch when they splash 3 cores.
We should have a thread devoted to making fun of confident naysayers like this post after they're proven wrong. :)

Looking at the SLS threads one would hope that equally applies to yourself.

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