Author Topic: LIVE: Atlas-V - MUOS-5 - June 24, 2016  (Read 57945 times)

Offline psionedge

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Re: Atlas-V - MUOS-5 - May 5, 2016
« Reply #20 on: 04/06/2016 06:16 PM »
Any new NET date?

Offline ZachS09

Re: Atlas-V - MUOS-5 - May 5, 2016
« Reply #21 on: 04/06/2016 07:10 PM »
May 12 is the new NET date per ULA.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline psionedge

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Re: Atlas-V - MUOS-5 - May 5, 2016
« Reply #22 on: 04/06/2016 07:49 PM »
Apologies, I should have been more specific. I was looking for a new one after the May 12 date. I had heard 5/27 from someone, but thought I would check here since the people here seem pretty well informed.

Offline ZachS09

Re: Atlas-V - MUOS-5 - May 5, 2016
« Reply #23 on: 04/06/2016 08:28 PM »
Apologies, I should have been more specific. I was looking for a new one after the May 12 date. I had heard 5/27 from someone, but thought I would check here since the people here seem pretty well informed.

Why the 27th? Was the mission delayed again?
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline cycleroadie

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Re: Atlas-V - MUOS-5 - May 5, 2016
« Reply #24 on: 04/06/2016 08:41 PM »
No further delays have been announced.
Lloyd
"As we leave the Moon at Taurus-Littrow, we leave as we came, and God willing, as we shall return, with peace and hope for all mankind. God bless the crew of Apollo 17." - Commander Gene Cernan , Apollo 17

Online Chris Bergin

Re: Atlas-V - MUOS-5 - NET May, 2016
« Reply #25 on: 04/08/2016 11:42 PM »
ULA:

Cape Canaveral Air Force Station, Fla. (April 8, 2016) -- The Atlas V MUOS-5 launch is delayed and indefinite on the Eastern Range due to ongoing evaluation of the first stage  anomaly experienced during the OA-6 mission. ULA successfully delivered the OA-6 Cygnus spacecraft to the International Space Station (ISS) on March 22. The MUOS-5 spacecraft and launch vehicle are secure at their processing facilities.

Offline Space Ghost 1962

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Re: Atlas-V - MUOS-5 - NET May, 2016
« Reply #26 on: 04/09/2016 04:03 AM »
So Tory Bruno wasn't worried about the manifest dragging out. Crickets chirping?

Offline psionedge

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Re: Atlas-V - MUOS-5 - NET May, 2016
« Reply #27 on: 04/09/2016 08:39 AM »
Can the Delta-IV or Delta-IV heavy deliver MUOS-5 to the ego transfer orbit required?

Offline MKremer

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Re: Atlas-V - MUOS-5 - NET May, 2016
« Reply #28 on: 04/09/2016 09:59 AM »
Can the Delta-IV or Delta-IV heavy deliver MUOS-5 to the ego transfer orbit required?
One of them could, but they'd be looking at significant lead time to get something built and ready to launch. There's a good chance the time period would be over and above the time it takes to resolve the A-V problem. (That's assuming politics, from different sources, doesn't delay things even longer.)  If the decision is made, then, first, all of the payload and launch calculations and planning would have to be re-done, evaluated, and approved before any hardware starts getting assembled.

Regardless of multiple launch options and the commonality of interfaces for payloads, EELV isn't 'plug-n-play'. They don't have multiple boosters and 2nd stages sitting in storage waiting for payloads, either, especially for massive payloads like MUOS (almost 7.5t/6800kg). So the hardware will need time to be manufactured and assembled, and tested.

So there's that lead time, plus the launch operations once the hardware is ready, which can take an additional 2-3 months for the D-IV/D-IVH. So, maybe 10-12 months as a rough estimate (and that's probably an accelerated time table.)


Offline Jim

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Re: Atlas-V - MUOS-5 - NET May, 2016
« Reply #29 on: 04/09/2016 01:51 PM »
Can the Delta-IV or Delta-IV heavy deliver MUOS-5 to the ego transfer orbit required?

Only the Heavy

Offline LouScheffer

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Re: Atlas-V - MUOS-5 - NET May, 2016
« Reply #30 on: 04/10/2016 03:02 AM »
Can the Delta-IV or Delta-IV heavy deliver MUOS-5 to the ego transfer orbit required?
Only the Heavy
It seems like the biggest Delta-IV could get pretty close to the desired orbit, maybe close enough in practice.  MUOS is quoted as massing 6740 kg, and the Atlas 551 puts it into a 3463xGEO at 19 degree orbit.  If I did the math right, that about 1425 m/s remaining. 

Delta-IV M+(5,4) is quoted as lifting 7430 kg to GEO-1800 orbit.  So if it lifted MUOS into this orbit, it would have about 700 kg of fuel left over.  Assuming a 2t Centaur, a 6.7t MUOS, and ISP of 450, the last 700kg of fuel should be good for an additional 340 m/s or so.  If you burned this at apogee, you have about 1470 m/s the satellite must supply.

Considering that GEO station-keeping costs something like 50 m/s per year, that implies only a 1 year reduction in lifetime compared to the Atlas launch.  For the savings in cost over a Delta-IV heavy this might be acceptable.

Of course this is just back of the envelope, and you'd need to worry about the mass of the adapter (is it included?), the mass of the kit to burn at apogee, disposal of the stage, etc.  But it might just barely be possible (though doubtless the Atlas is more desirable).

Offline Jim

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Re: Atlas-V - MUOS-5 - NET May, 2016
« Reply #31 on: 04/10/2016 12:07 PM »
Delta-IV M+(5,4) is quoted as lifting 7430 kg to GEO-1800 orbit.  So if it lifted MUOS into this orbit,

That isn't the desired orbit and hence that is why it is not able to launch MUOS. It doesn't matter Delta-IV M+(5,4) can get it to GEO-1800 orbit.  And it is more than just 1 year of spacecraft propellant.  There are also some fairing considerations.
« Last Edit: 04/10/2016 12:12 PM by Jim »

Offline baldusi

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Re: Atlas-V - MUOS-5 - NET May, 2016
« Reply #32 on: 04/11/2016 12:22 PM »
Given the lead time on RS-68A and other long lead time items, a Delta IV Heavy needs no less than 30 month from ATP to launch. So say three years delay for switching to Delta IV. I guess they will wait to resolve the Atlas V anomaly.

Offline psionedge

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Re: Atlas-V - MUOS-5 - NET May, 2016
« Reply #33 on: 04/12/2016 03:39 AM »
Spaceflightnow identifies May 27 as the next date: http://spaceflightnow.com/2016/04/12/new-target-date-for-next-atlas-5-launch/

Quote
CAPE CANAVERAL — As the internal investigation continues into the first stage performance trouble on the last Atlas 5 rocket launch, the next mission on the manifest has slipped to May 27.

Originally planned for May 5, the flight of the Navy’s fifth and final planned Mobile User Objective System communications satellite has been postponed twice while engineers work to determine the exact cause of the anomaly.

Offline jacqmans

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Re: Atlas-V - MUOS-5 - NET May, 2016
« Reply #34 on: 04/29/2016 02:17 PM »
Centennial, Colo., (April 29, 2016) --

Last Friday, in preparation for the MUOS-5 launch, the Atlas V completed the Launch Vehicle on Stand (LVOS) operation, erecting the Atlas V into the Vertical Integration Facility at Cape Canaveral Air Force Station. LVOS will allow configuration of the vehicle to support RD-180 engine inspections and confirm all engine components are ready for launch. The Atlas V MUOS-5 launch is targeted for early summer; a new launch date has not been secured on the Eastern Range. The impact to the remainder of the Atlas V manifest is in review with new launch dates being coordinated with our customers. All missions manifested for 2016 are expected to be successfully executed by the end of the year, including OSIRIS-REx, which will remain in early September to support its critical science window.


Offline cycleroadie

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Lloyd
"As we leave the Moon at Taurus-Littrow, we leave as we came, and God willing, as we shall return, with peace and hope for all mankind. God bless the crew of Apollo 17." - Commander Gene Cernan , Apollo 17

Offline Moonbase_Alphan

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Re: Atlas-V - MUOS-5 - Late June, 2016
« Reply #37 on: 05/03/2016 10:14 PM »
Targeting June 24 now:
http://spaceflightnow.com/2016/05/03/new-lineup-plan-spelled-out-for-upcoming-atlas-5-rocket-launches/

Not sure that is correct , Falcon 9 CRS-9 launch is on that day currently

https://spaceflightnow.com/launch-schedule/
that is correct. The CRS-9 will be slipping a couple days at least, as 47S is launching to ISS on 6/24 (as well).

Offline WHAP

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Re: Atlas-V - MUOS-5 - Late June, 2016
« Reply #38 on: 05/04/2016 03:01 AM »
Targeting June 24 now:
http://spaceflightnow.com/2016/05/03/new-lineup-plan-spelled-out-for-upcoming-atlas-5-rocket-launches/

Not sure that is correct , Falcon 9 CRS-9 launch is on that day currently

https://spaceflightnow.com/launch-schedule/

Before MUOS moved to that date, ULA had it for NROL-61, and I believe the range was secured.  SpaceX never had that date.
ULA employee.  My opinions do not necessarily reflect those of my employer.

Offline jacqmans

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Re: Atlas-V - MUOS-5 - June 24, 2016
« Reply #39 on: 06/13/2016 02:16 PM »
Atlas V to Launch the Fifth Mobile User Objective System (MUOS-5)

Atlas V MUOS-5 Mission ArtworkRocket/Payload: A United Launch Alliance Atlas V 551 will launch the U.S. Navy’s fifth Mobile User Objective System (MUOS-5) satellite, built by Lockheed Martin.

Date/Site/Launch Time: Confirmed on the Eastern Range for Friday, June 24, 2016, from Space Launch Complex-41 at Cape Canaveral Air Force Station, Florida.

Webcast: The launch will be broadcast live via the ULA website.

Mission Description: The fifth Mobile User Objective System (MUOS-5) satellite is the latest addition to a network of orbiting satellites and relay ground stations that is revolutionizing secure communications for mobile military forces. Users with operational MUOS terminals can seamlessly connect beyond line-of-sight around the world and into the Global Information Grid. MUOS’ new commercial, cellular-based capabilities include simultaneous, crystal-clear voice, video and mission data, over a secure high-speed Internet Protocol-based system.

Launch Notes: MUOS-5 will mark the 63rd Atlas V since the vehicle’s inaugural launch in August 2002. MUOS-5 will be the seventh mission to launch in the 551 configuration; other missions launched in this configuration include four previous MUOS missions as well as the New Horizons mission to Pluto and the Juno mission to Jupiter.

Launch Updates: To keep up to speed with updates to the launch countdown, dial the ULA launch hotline at 1-877-852-4321 or join the conversation at www.facebook.com/ulalaunch, twitter.com/ulalaunch and instagram.com/ulalaunch. Hashtags #MUOS and #AtlasV.

Go Atlas! Go Centaur! Go MUOS-5!
« Last Edit: 06/13/2016 02:17 PM by jacqmans »

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