First Robotic Satellite Servicer Launched

Posted by GlenTheMachine 3 days ago

Comments

Comment by GlenTheMachine 10 minutes ago

I'm the lead roboticist. Within bounds, I can answer questions.

Comment by walrus01 7 minutes ago

It sounds like each "MEP" (mission extension pod) once attached is its own fully autonomous satellite? How big is each MEP? Like, a mini fridge?

Since the mission is designed to attach one and then leave to go to another satellite that needs servicing?

Comment by GlenTheMachine 5 minutes ago

Sort of mini-fridge sized. They take over attitude control and propulsion for satellites that are low on fuel.

Comment by sidewndr46 6 minutes ago

sure seems like this could just as easily be used to perform on-orbit disassembly of a hostile nation's satellite?

Comment by walrus01 2 hours ago

It's not exactly the first, this is the first (unclassified, that we know about) satellite to go up and grapple a satellite in geostationary and provide stationkeeping functions for it, which did so back in 2020:

https://en.wikipedia.org/wiki/Mission_Extension_Vehicle

This is all very novel because in the relatively long history of humans sticking stuff in geostationary orbit, not once until 2020 had any sort of mission gone out to geostationary and intentionally grappled or docked with another satellite.

Comment by notahacker 46 minutes ago

The multi-purpose robotic manipulation makes this a bit more advanced and experimental than the dedicated MEV attachment, as useful and performant as the MEV has been. China also demonstrated robotic grappling and towing in GEO in 2021. A few other US and European experimental robotic servicing missions in the pipeline, involving both Active Debris Removal grappling and robotic arms playing with designated payloads and attachment interfaces, but mostly planned for LEO.

There's a tendency for such experimental servicing missions (e.g DARPA Orbital Express) to take place in lower orbits, along with all the crewed space station docking and shuttle servicing missions. LEO is cheaper for servicing demonstrations, more human-friendly and also where the Hubble Space Telescope that took a fair bit of servicing happens to be based. But for the robotics, sufficiently advanced autonomy for the latency not to be a major issue is also important.

Comment by walrus01 41 minutes ago

The new robot grappler arm definitely seems like an advancement on previous designs. The MEV was, as I recall, designed to mate with only a specific set of models of geostationary satellite bus and, for lack of a better term, ram a probe up its backside to grab onto it.

the probe ramming: https://www.youtube.com/watch?v=vJZ3xmuom0M

One of the things that people who don't pay attention to space based infrastructure find odd, if you tell them, is that in the entire history of manned spaceflight no human has ever gone to geostationary orbit.

Comment by sidewndr46 5 minutes ago

Why would we? More importantly, why would anyone go to orbit period when you can do it with a robot.

Comment by rbanffy 14 minutes ago

A real shame it's not a crewed spacecraft - would be nice to have crewed access to GEO...

Robots get the best jobs...

Comment by redbridgerock 2 hours ago

Woah dual robot arms with tools on it! I have past experience using a CNC machine and I to this day remember how laborious it was to edit g-code and try to fine tune it. I cannot imagine the amount of work it would take to do that for something in space and on a robot arm. That is awesome.

Comment by petcat 3 hours ago

> Funded by the Defense Advanced Research Projects Agency (DARPA), the RSGS payload is designed and developed by the U.S. Naval Research Laboratory (NRL). The payload is integrated on the Mission Robotic Vehicle (MRV) spacecraft, developed by SpaceLogitistics, a Northrop Grumman company, and was launched onboard a SpaceX Falcon 9 rocket.

That's quite a who's who of public-private partnership. It's fascinating to watch these commercial space industries develop in real-time.

Comment by ballooney 3 hours ago

Almost all the ‘servicing’ and ‘orbital debris cleanup’ robot-arm sats are funded quite heavily by military end users, because there is really no market for their stated aims and a huge market for the unstated aims - flying up to an adversary’s satellite and messing it up. Open secret in the industry.

Comment by walrus01 10 minutes ago

Presumably it's also known to everyone who builds/operates these that having a foreign nation's military satellite intentionally approach your own geostationary satellite to within a very short distance, as the vast area up there goes, is a very thinly veiled threat or demonstration of capability.

https://www.google.com/search?client=firefox-b-d&q=russian+s...

Outside of GEO, nobody in the public really knows what the X-37 does when it's in orbit, but one of the theories I have seen thrown around is that it's capable of approaching and inspecting other things in LEO, or theoretically even grabbing or manipulating one in some way.

Comment by cameron_b 2 hours ago

As I understand it, the current on-orbit service functions include... orbit manipulations.

Any service functions of existing equipment would depend on charge interface or communications functions that are not exposed or standardized.

It will make a good season to practice kinetic adjustments until the fleets start shipping terminals for Astromech droids.

Comment by ramgine 3 hours ago

TIL DARPA is still around. Kind of thought they got the “doge” treatment

Comment by wrs 2 hours ago

But why isn’t it called WARPA now?

Comment by walrus01 2 minutes ago

Since Pete took the helm and renamed things, it's definitely now the Whiskey Advanced Research Projects Agency.

Comment by pennomi 2 hours ago

Defense doesn’t get DOGE’d, only programs that build up communities do. There’s always budget for more destruction.

Comment by ButlerianJihad 2 hours ago

Wait until you find out which agency founded the Internet

Comment by rbanffy 11 minutes ago

The internet was conceived to be something very different from the web we all know and loathe. Anyway, I think GP was referring to building community centres, schools, libraries, and caring for vulnerable people. Those, it seems, were fully DOGE'd.

Comment by petcat 2 hours ago

DOGE got DOGE'd itself. It doesn't exist anymore.

Comment by sivex 1 hour ago

No mention of OSAM-1, $2 billion NASA mission cancelled due to delays, and likely due to this mission beating it to launch.

Comment by ck2 1 hour ago

wait that reminds me, what happened with the SWIFT rescue attempt recently to lift it into a higher orbit?

* https://science.nasa.gov/mission/swift/swift-boost-mission/

* https://science.nasa.gov/blogs/swift/

Comment by eichin 51 minutes ago

They should be close to the end of the checkout stage, then it'll take 4 weeks to get in the right orbit and another 2 weeks of inspection ( https://en.wikipedia.org/wiki/Swift_boost_mission#Boost_oper... has an easier all-in-one-place timeline than the NASA pages.)