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#40
by
bobthemonkey
on 21 May, 2014 18:25
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There's also the background to whats gone on in the GEO sat market since the first SDS birds launched given a wider commercial base to leverage.
The original TDRS fleet were, AIUI pretty much custom TRW vehicles; the current block 3 Boeing TDRS units are built on the common 601/701 bus, with a unique payload, much like any other Comsat.
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#41
by
kevin-rf
on 21 May, 2014 19:15
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There's also the background to whats gone on in the GEO sat market since the first SDS birds launched given a wider commercial base to leverage.
The original TDRS fleet were, AIUI pretty much custom TRW vehicles; the current block 3 Boeing TDRS units are built on the common 601/701 bus, with a unique payload, much like any other Comsat.
Not to nit, but the original SDS satellites in Molniya orbits are believed to be based on commercial GEO platforms. Specifically the Hughes HS-350 bus. Siruis adapted Space Systems Loral LS-1300 bus for Tundra orbits (similar to Molniya).
GEO platforms can and have been leveraged for Molniya orbit satellites. So that must not be it.
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#42
by
bobthemonkey
on 21 May, 2014 19:28
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Nit away - missed the link to the Hughes bus.
The other point I think I was trying to make is that there is more synergies with the commercial side which would drive confidence and cost savings.
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#43
by
Blackstar
on 21 May, 2014 19:32
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There's also the background to whats gone on in the GEO sat market since the first SDS birds launched given a wider commercial base to leverage.
The original TDRS fleet were, AIUI pretty much custom TRW vehicles; the current block 3 Boeing TDRS units are built on the common 601/701 bus, with a unique payload, much like any other Comsat.
Not to nit, but the original SDS satellites in Molniya orbits are believed to be based on commercial GEO platforms. Specifically the Hughes HS-350 bus. Siruis adapted Space Systems Loral LS-1300 bus for Tundra orbits (similar to Molniya).
Yeah, I concluded that Intelsat IV, SDS, and Jumpseat were all probably closely related. They were derivatives (or at least descendents) of Tacsat.
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#44
by
jacqmans
on 22 May, 2014 04:21
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#45
by
Chris Bergin
on 22 May, 2014 07:19
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William Graham's article coming up. Wow, where's that photo from Jacques, it's amazing.
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#46
by
Galactic Penguin SST
on 22 May, 2014 08:02
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William Graham's article coming up. Wow, where's that photo from Jacques, it's amazing.
From none other than
ULA themselves.
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#47
by
Chris Bergin
on 22 May, 2014 08:13
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Epic. There's our lead image sorted!
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#48
by
Garrett
on 22 May, 2014 09:25
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Epic. There's our lead image sorted!
Which one? They're all epic!
My fav is the 4th (2nd last). Wonderful lighting, both artificial and natural.
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#49
by
Chris Bergin
on 22 May, 2014 09:44
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#50
by
jacqmans
on 22 May, 2014 10:08
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L-3 Hours: The Launch Area is now being evacuated in preparation for propellant loading. #NROL33
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#51
by
Chris Bergin
on 22 May, 2014 11:02
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ULA:
The countdown is underway for the launch of the National Reconnaissance Office (NROL-33) mission set to lift off on a ULA Atlas V rocket this morning from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida at 9:05 a.m. EDT. The forecast continues to show a 90 percent of favorable weather conditions.
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#52
by
Hunts Villain
on 22 May, 2014 11:14
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New t-0 9:09E for COLA.
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#53
by
Chris Bergin
on 22 May, 2014 11:15
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New t-0 9:09E for COLA.
Oh, thank you sir!
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#54
by
Garrett
on 22 May, 2014 11:30
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#55
by
Prober
on 22 May, 2014 11:40
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wow someone has an artsy side
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#56
by
Chris Bergin
on 22 May, 2014 12:30
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#57
by
Artyom.
on 22 May, 2014 12:38
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ULA @ulalaunch
Weather for NROL 33 launch on an Atlas V is green for launch!
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#58
by
Chris Bergin
on 22 May, 2014 12:45
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#59
by
Artyom.
on 22 May, 2014 12:45
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ULA webcast has started
