egg changed the topic of #principia to: Logs: https://esper.irclog.whitequark.org/principia | <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…
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<Tivec> but when i look at the flight plan and make it a fair bit of time into the future, my geo's will drift. how do you reduce the drift typically? just make it more precise on the orbital period?
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Reply to "Butcher: They are fancy."
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<Tivec> what on earth is that 😄 looks fabulous!
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<Butcher> Pluto-Charon. You get fun stuff due to the barycentre being outside both bodies
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Reply to "Tivec: i mean, this payload will drift around the equator over time, right? how do i know how fa..."
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<egg> You can increase the analysis duration and look at what’s after the ± signs on the two lines below « Longitudes of equatorial crossings »
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<egg> That will tell you how much it shifts over the mission duration
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Reply to "egg: You can increase the analysis duration and look at what’s after the ± signs on the two li..."
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<Tivec> Ahhh that works
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Reply to "Butcher: They are fancy."
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<sichelgaita> This picture nicely illustrates the fact that we don't really know how to compute equipotentials in this particular system, so there is a bright equipotential that just stops in empty space in the upper left quadrant.
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Reply to "Tivec: How do you achieve this type of stationary orbit? I suspect it has to do with the inclina..."
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<SkyPhoenix999> Slight eccentricity and incline the orbit slightly, apogee in the Southern Hemisphere
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<Tivec> Gotcha. Based on the shape of the orbit, it spends most time in the south no? I mean yes if apogee is there I guess it does
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<SkyPhoenix999> Yeah
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<egg> except it is not.
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<pineconez> yeah that's a variation of molniya/tundra, basically, just not as extreme I guess. also, that Ap is northern hemisphere, this is the orbit of that Japanese navigation (?) satellite system
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<egg> This is a QZSS ground track. The apogee is over Japan, not over Australia.
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<pineconez> you can tell by the curve being smaller in the north
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<Tivec> Hold up, those satellites orbit the same orbit but separated? How on earth is this achieved lol
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<pineconez> LAN
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<pineconez> and careful phasing.
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<Tivec> Still early in my satellite career with principia, so these things are interesting and very new to me. I’m looking at the ship to Andover satellite connection (skopos), where I guess I need apoapsis somewhere near the equator west of Africa. What’s the best way to go about this? My parking orbit is going to be 5 degrees inclined so I guess I should burn when my periapsis is in the southern hemisphere and opposite side?
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<Tivec> With a combined inclination change too I guess, it would be best to reach at least 40 degrees if at all possible.. unless that is cheaper at apo for geo
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<ezsnack> Idk about the specifics of the question but an inclination change is always worse than launching in the correct inclination
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Reply to "ezsnack: Idk about the specifics of the question but an inclination change is always worse than la..."
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<Tivec> Right but getting the periapsis in the right place is harder that way isn’t it?
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<Tivec> I launch from kourou, and want the apoapsis over like the Azores
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<ALiTo> i was read this text before. But with my English language knowledge bad and i cant understand how it fix 😦
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<Clayel> it should be fine to have parallax installed
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<Clayel> tbf that section is kinda unclear
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<egg> If you are using stock+parallax, as far an Principia is concerned, you are not using stock, so you need to use the linked patch to get retrobop.
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<Clayel> oh, so principia wont use the retrobop patch by default if parallax is installed, but the patch will still work fine when installed?
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<egg> I think you understood, but « use the retrobop patch » is a very confusing way to put it when no patch file is present or involved. I think you mean « fix the Jool system ».
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<Clayel> but you can fix the jool system in parallax by using the linked kopernicus patch, right?
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<Tivec> hrm, how do you get to a specific argument of periapsis? launch to a target inclination and burn at the southern most point?
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<Clayel> that would give you an aop of 270, so ya
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<pineconez> I forget if it's basegame or KSPCF, but if you make a maneuver and go into the stock GUI Advanced Orbit Info (bottom left) and select the maneuver with the arrows, it'll tell you ArgPe
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<pineconez> 270° being south, for classic molniya/tundra orbits over the northern hemisphere
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Reply to "pineconez: 270° being south, for classic molniya/tundra orbits over the northern hemisphere"
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<Clayel> for all inclined orbits
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Reply to "Clayel: what does ‘unsupported’ mean in this context? celestials that cause an apocalypse, or cel..."
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<egg> The part of the sentence after the colon answers your question: If you add celestials to an RSS install, Principia will crash. Prinicpia-aware mods that add celestials to RSS have to patch the Principia initial state to avoid this.
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Reply to "pineconez: I forget if it's basegame or KSPCF, but if you make a maneuver and go into the stock GUI ..."
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<Tivec> Can’t I look at the maneuver orbit analysis in principia?
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Reply to "egg: The part of the sentence after the colon answers your question: If you add celestials to ..."
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<Clayel> and the gravity model right?
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<pineconez> oh, I keep forgetting that Principia shows all of that orbital info neatly in a window :p of course you can
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Reply to "Clayel: for all inclined orbits"
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<pineconez> that was meant as "used for those orbits", if you want the sat to hover over some other latitude, you have to pick a different argpe
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<egg> And the change descriptions for the FAQ page are not a place for asking questions, in this case> i believe helio synchronous refers to the orbit actually aligning with the sun's rotation? sunsynchronous is the correct term for what is in the album
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<egg> - it is spelled sun-synchronous, not sunsynchronous—I think we use that term in the English Principia UI; - heliosynchronous is a synonym (and héliosynchrone is the only term in French).
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<egg> (I don’t know what you think « actually aligning with the sun's rotation » means, but anyway, sun-synchronous and heliosynchronous are synonyms.)
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<Clayel> that was 2 years ago, i had never heard the term before
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<Clayel> i feel like its unfair to blast me for trying to improve the wiki, most wikis have a ‘be bold’ policy where people are encouraged to try to improve the wiki even if they are not 100% sure of what they are saying
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<Clayel> idk why you had to be so hostile, you couldve just said ‘the content before was fine actually’ in the change description of a fixed edit
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<egg> And the change descriptions for the FAQ page are not a place for asking questions, in this case> i believe helio synchronous refers to the orbit actually aligning with the sun's rotation? sunsynchronous is the correct term for what is in the album
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<Clayel> i see mistakes all the time on wikis, but unless someone is intentionally trying to be malicious, i dont call them out for making a mistake when editing a wiki
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<sichelgaita> We welcome improvements to the wiki (which, to be honest, is badly in need of them). I am not aware of a 'be bold' policy, but in our case, where the wiki is a key part of the documentation, please make sure that your contributions are technically correct (the best kind of correct) as inaccuracies could confuse other users. That's particularly important for terminology, so that people can look up terms in
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reference works/sites.
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<Clayel> im sorry that i made a mistake 2 years ago, ive gotten a lot better at editing since i made that mistake
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<Clayel> but there is always a tradeoff with having an open wiki, you’ll have more contributions, but mistakes are gonna happen more often. the mistakes correct themselves though over time with more edits
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<Clayel> a ‘be bold’ policy is implied for all open wikis unless stated otherwise, since if its not allowed then you’ll have people too scared to edit in fear of making a mistake (which ive seen both in this server and in other games’ wikis)
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<Clarathecat> Any word of advice on making principia run on the steam deck?