Author Topic: NASA Restore-L LEO servicing  (Read 5900 times)

Offline arachnitect

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NASA Restore-L LEO servicing
« on: 06/17/2015 04:31 AM »
Descendent of RRM I guess.

A project to keep GSFC busy; hadn't heard of it until today.

Offline A_M_Swallow

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Re: NASA Restore-L LEO servicing
« Reply #1 on: 06/17/2015 04:54 AM »
The refuelling hardware on the Restore-L are government furnished equipment. Are they a copy of the equipment attached to the ISS's Dextre? Or something from the Department of Defence?

Offline TrevorMonty

Re: NASA Restore-L LEO servicing
« Reply #2 on: 06/17/2015 04:58 AM »
Sounds like this is taylor made for OrbitalATK ViviSat. The picture even looks the same.

http://www.parabolicarc.com/2015/03/22/sat-servicing/


Offline arachnitect

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Re: NASA Restore-L LEO servicing
« Reply #3 on: 06/17/2015 02:28 PM »
The refuelling hardware on the Restore-L are government furnished equipment. Are they a copy of the equipment attached to the ISS's Dextre? Or something from the Department of Defence?

The people in charge of this are the people doing the experiments on ISS, so it's probably pretty similar to that.

Offline mainmind

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Re: NASA Restore-L LEO servicing
« Reply #4 on: 12/16/2015 03:05 PM »
This also gets a mention in the 2016 omnibus budget with $133 million for the effort:

http://spacenews.com/nasa-receives-19-3-billion-in-final-2016-spending-bill/

And apparently has a request for information floating out there that is related to the Asteroid Redirect mission:
http://www.coloradospacenews.com/nasa-seeks-additional-information-for-asteroid-redirect-mission-spacecraft/


Online savuporo

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Re: NASA Restore-L LEO servicing
« Reply #5 on: 04/25/2016 02:55 AM »
NASA site

http://ssco.gsfc.nasa.gov/restore-l.html
LAUNCH DATE: Late 2019

Darpa RSGS has very similar goals. Also looks like DLR signed a 4.5M eur DEOS Phase B2 contract recently with Airbus
Orion - the first and only manned not-too-deep-space craft

Offline Comga

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Re: NASA Restore-L LEO servicing
« Reply #6 on: 11/27/2016 08:15 PM »
The refuelling hardware on the Restore-L are government furnished equipment. Are they a copy of the equipment attached to the ISS's Dextre? Or something from the Department of Defense?

The people in charge of this are the people doing the experiments on ISS, so it's probably pretty similar to that.

The lidar unit is currently planned to be another like that built for the STORRM experiment on STS-134, the one on the ISS RRM, and the one in Raven going up in STP-H5 on the upcoming SpX-10.  Modifications are minor, so yes A_M_Swallow's guess is correct.  This is coming out of NASA GSFC.
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Online russianhalo117

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Re: NASA Restore-L LEO servicing
« Reply #7 on: 12/08/2016 04:36 AM »
BUMP:
Manufacturing contract has been awarded: http://forum.nasaspaceflight.com/index.php?topic=41781.0

Offline gosnold

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Re: NASA Restore-L LEO servicing
« Reply #8 on: 01/14/2017 09:19 AM »
FISO presentation on sat servicing, including restore-L:

http://spirit.as.utexas.edu/%7Efiso/telecon/Reed_1-11-17/

Offline Hobbes-22

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Re: NASA Restore-L LEO servicing
« Reply #9 on: 01/14/2017 07:28 PM »
I'm kinda disappointed they didn't go with the name Restore-R  :P

Offline jongoff

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Re: NASA Restore-L LEO servicing
« Reply #10 on: 01/15/2017 03:06 AM »
FISO presentation on sat servicing, including restore-L:

http://spirit.as.utexas.edu/%7Efiso/telecon/Reed_1-11-17/

That was my first FISO telecon I had the chance to listen to live (it's usually a bad time of the week for me). I really liked some of the last slides, where they were talking about "low-hanging fruit" initiatives they were working on for making future spacecraft more readily serviceable. Like adding optical fiducial "stickers" to the back of the spacecraft, or developing a robotic fueling interface that seems to be similar size and weight to existing less-serviceable connections.

Also interesting to hear that in ~14 months they'll be launching RRM-3 to ISS, which will include a cryo methane transfer experiment.

~Jon

Offline jongoff

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Re: NASA Restore-L LEO servicing
« Reply #11 on: 01/15/2017 03:07 AM »
I'm kinda disappointed they didn't go with the name Restore-R  :P

Isn't the L for "LandSat" the satellite they're targeting for servicing?

~Jon

Offline Skyrocket

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Re: NASA Restore-L LEO servicing
« Reply #12 on: 01/15/2017 09:55 AM »
I'm kinda disappointed they didn't go with the name Restore-R  :P

Isn't the L for "LandSat" the satellite they're targeting for servicing?

~Jon

L is for "low earth orbit". There was also a study for RESTORE-G for a "geostationary orbit" mission.

Offline TakeOff

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Re: NASA Restore-L LEO servicing
« Reply #13 on: 01/18/2017 06:54 AM »
Why refuel satellites? Why not let the "Restore-L" instead tug the satellite with its own engine? It should be much easier and safer and one doesn't need to care about what fuel type the satellite originally had.

Offline Jim

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Re: NASA Restore-L LEO servicing
« Reply #14 on: 01/18/2017 12:49 PM »
Why refuel satellites? Why not let the "Restore-L" instead tug the satellite with its own engine? It should be much easier and safer and one doesn't need to care about what fuel type the satellite originally had.

Because a "tug" isn't needed.  No "engine" is need.  The propellant is for attitude control.  Attaching another spacecraft is not that simple.  The mass properties of the stack is different.  The attached spacecraft would interfere with look angles of sensors and instruments.  It would require sending commands to two spacecraft to point and take data.

Offline TrevorMonty

Re: NASA Restore-L LEO servicing
« Reply #15 on: 01/18/2017 05:52 PM »
Why refuel satellites? Why not let the "Restore-L" instead tug the satellite with its own engine? It should be much easier and safer and one doesn't need to care about what fuel type the satellite originally had.

Because a "tug" isn't needed.  No "engine" is need.  The propellant is for attitude control.  Attaching another spacecraft is not that simple.  The mass properties of the stack is different.  The attached spacecraft would interfere with look angles of sensors and instruments.  It would require sending commands to two spacecraft to point and take data.
OrbitalATK intend to start with a space tug then evolve it add servicing and refuelling capabilities to it. The space tug will latch onto satellite engine bell and take over all propulsion jobs. Have signed customers for 2019-2020 launch.See OA thread for more info.

What the tugs needs is away to refuel themselves from a upper stage or newly deployed satellite. ACES would be ideal for this as it should have endurance to enable rendezvous with tug after its initial mission. Tug refuels from secondary payload tanks. As extra bonus tug could attach dead satellite to ACES for disposal.

Offline Jim

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Re: NASA Restore-L LEO servicing
« Reply #16 on: 01/18/2017 06:02 PM »

OrbitalATK intend to start with a space tug then evolve it add servicing and refuelling capabilities to it. The space tug will latch onto satellite engine bell and take over all propulsion jobs. Have signed customers for 2019-2020 launch.See OA thread for more info.


That is for GEO comsats, which have different requirements than a LEO spacecraft.  GEO Comsats only point in one direction and have the same basic design.  Also, then again, they don't need a "tug" with an engine.  Just some station keeping thrusters.

Offline TrevorMonty

Re: NASA Restore-L LEO servicing
« Reply #17 on: 01/18/2017 07:01 PM »



  Also, then again, they don't need a "tug" with an engine.  Just some station keeping thrusters.

One market OA tug will address is repositioning GEO satellites. Allows satellite to conserve its fuel for station keeping.

The following is my idea may not be practical.
If tug is available to place satellite in grave yard orbit, then satellite can also use fuel reserved for disposal to extend its life.

Offline TakeOff

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Re: NASA Restore-L LEO servicing
« Reply #18 on: 01/19/2017 08:00 PM »
Why refuel satellites? Why not let the "Restore-L" instead tug the satellite with its own engine? It should be much easier and safer and one doesn't need to care about what fuel type the satellite originally had.

Because a "tug" isn't needed.  No "engine" is need.  The propellant is for attitude control.  Attaching another spacecraft is not that simple.  The mass properties of the stack is different.  The attached spacecraft would interfere with look angles of sensors and instruments.  It would require sending commands to two spacecraft to point and take data.
Hubble is pointed with reaction wheels and was boosted to higher altitude by the space shuttle. Wouldn't that be applicable to many satellites in LEO, but with a small tug in place of the shuttle? During satellite operations the tug could be undocked and at standby nearby until next orbital correction is needed, or go off to another servicing mission.

What about designing satellites such that its fuel tank with thrusters is replaceable? When it is getting empty, it is undocked and discarded while a tug brings a new identical fuel tank with thrusters to replace it. No need then to transfer fuel in microgravity.
« Last Edit: 01/19/2017 08:01 PM by TakeOff »

Offline Jim

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Re: NASA Restore-L LEO servicing
« Reply #19 on: 01/20/2017 11:07 AM »

Hubble is pointed with reaction wheels and was boosted to higher altitude by the space shuttle. Wouldn't that be applicable to many satellites in LEO, but with a small tug in place of the shuttle? During satellite operations the tug could be undocked and at standby nearby until next orbital correction is needed, or go off to another servicing mission.


Hubble was an exception.  It was designed for shuttle servicing and hence had to be in a low orbit that would require reboost.   There few to no other like Hubble.  Most spacecraft are placed is orbits driven by science and the requirements and not be low enough for shuttle servicing.  Hubble should have resided at L2 like JWST and SIRTF for scienc[quote



What about designing satellites such that its fuel tank with thrusters is replaceable? When it is getting empty, it is undocked and discarded while a tug brings a new identical fuel tank with thrusters to replace it. No need then to transfer fuel in microgravity.

That doesn't place the thrusters in the locations.  Also, the propellant is not near the CG


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