raptop changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is Galileo. We currently target 1.5.1, 1.6.1, 1.7.x, 1.8.1, and 1.9.1. <scott_manley> anyone that doubts the wisdom of retrograde bop needs to get the hell out | https://xkcd.com/323/ | <egg> calculating the influence of lamont on Pluto is a bit silly… | <egg> also 4e16 m * 2^-52 is uncomfortably large
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Builderbast. — yeah ive been trying that, but it brings a lot of issues with it too
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NebelLuke. — Principia Noob Here but wtf is wrong whit the moon
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NebelLuke. — i dont understand anything
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NebelLuke. — hahahah
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Damien. — @NebelLuke read up on reference frames. The frame you're most familiar with from stock is earth centered inertial in principia. Things orbit around the earth and the earth spins on its axis. In different reference frames things have to move differently to still be accurate
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Damien. — @NebelLuke read up on reference frames. The frame you're most familiar with from stock is earth centered inertial in principia (if looking at the earth). Or sun centered inertial if looking at the rest of the solar system. Things orbit around the earth and the earth spins on its axis. In different reference frames things have to move differently to still be accurate (edited)
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Krzysztof Rudowicz. — New one on the Discord so... Hey!
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Krzysztof Rudowicz. — I was wondering if there's any way to use existing tools (MJ/TWP) for transfer window planning with Principia. From what I've read, most probably not, since the modeling included a lot of new variables, but at the same time coming back after a long time and now ever achieving more than a lunar impactor leaves me thinking I might have been too ambitious with the whole thing...
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Damien. — TWP is good enough for a rough estimate but doesn't know what inclinations are
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Krzysztof. — If it would give me at least an estimate, it's still great. Thanks!
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Marsu. — When using MJ to execute Principia Nodes, do you check active engine or instant impulse ? MJ is always too short when i try to use it
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lpg. — MJ doesn't take the non-instant ignition time into account
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egg. — you need a recent dev build of MJ to execute Principia nodes
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egg. — and then you should use active engines
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Marsu. — Yep i have the latest
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egg. — and yes, it assumes instant ignition
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Marsu. — Ok
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egg. — which leads to inaccuracies
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Marsu. — That explain it 🙂
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lpg. — I've had sort of decent results by manually tweaking the maneuver to start a bit earlier and last correspondingly longer, but it's awkward at best
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egg. — yeah support for that will not get better until there is closed-loop guidance
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egg. — poke @lamont for that but that is years away
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lamont. — yo
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egg. — years of poking
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lamont. — might not be
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lamont. — i just started rewriting PVG in C# to make it more extensible
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Marsu. — Mmmm so the Best for now is to uncheck the « requier signal to control » and burn manually even if i don’t have a link
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egg. — @lamont what was it in so far?
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lamont. — C#
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lamont. — but it was garbage code
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egg. — ah
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lamont. — i rewrote it in matlab another half dozen times and finally have a pretty clean implementation there
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egg. — the thing is guiding to the Principia target trajectory might be nontrivial
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egg. — especially since now you have all sorts of fancy calculus of variations things going on iirc?
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lamont. — its better than PEG was
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siimav. — Btw, do you have plans to hook PVG up with the node executor again?
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lamont. — i need to think about it, but really if i can get an osculating Orbit on the target orbit near the burnout time then i can just do normal stock 1-body calcs to rendezvous/match elements with it and that'll be 99% better than what is there now
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lamont. — and yeah that's what i'm talking about doing
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siimav. — Oh, right
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lamont. — that's why i'm getting a bit "yeah, PVG launches will never ever have that feature"
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lamont. — time to start working on node execution and landings and eventual prep for KSP 2 stuff, and just working on more interesting code than debugging and hacking up the existing hot mess