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…
<queqiao-> ⟨SquirrelBomber⟩ ⟪lamont⟫ and then if that's all you're trying to […] ⮪ I set a ulimit but it didn’t limit the process ram consumption
<queqiao-> ⟨SquirrelBomber⟩ this is what it looks like
<queqiao-> ⟨SquirrelBomber⟩ when i use ulimit
<queqiao-> ⟨SquirrelBomber⟩ i have 16gb of ddr5
<queqiao-> ⟨lamont⟩ that's weird, i can drop my hard and soft ulimits on my ubuntu nodes
<queqiao-> ⟨lamont⟩ i'm not convinced that'll help you at all though, since you'll just cause malloc to fail and the process will crash
<queqiao-> ⟨lamont⟩ ulimit -m (RLIMIT_RSS) has no effect on modern linux after kernel 2.4
<queqiao-> ⟨lamont⟩ ulimit -v (RLIMIT_AS) looks like what you need to modify
<queqiao-> ⟨SquirrelBomber⟩ ⟪lamont⟫ ulimit -v (RLIMIT_AS) looks like what […] ⮪ i tried prlimit for the address space but it had no effect
<queqiao-> ⟨SquirrelBomber⟩ my ksp is using 14.8gb of ram and 40-60gb of virtual memory on average
<queqiao-> ⟨lamont⟩ you may need to use other tactics to reduce memory usage, deinstall mods, remove parts and textures, use lower res RSS etc
<queqiao-> ⟨SquirrelBomber⟩ i’m very much trying to avoid that lol. the big problem is principia, it’s what crashes my game
<queqiao-> ⟨lamont⟩ make sure you've got swap setup so you can evict less used pages to disk
<queqiao-> ⟨SquirrelBomber⟩ i have 55gb of swap
<queqiao-> ⟨SquirrelBomber⟩ i figured i might as well go overkill just in case
<queqiao-> ⟨lamont⟩ that's probably excessive but sure
<queqiao-> ⟨SquirrelBomber⟩ it absolutely is lol
<queqiao-> ⟨SquirrelBomber⟩ this game worked completely fine on windows
<queqiao-> ⟨SquirrelBomber⟩ with barely any lag
<queqiao-> ⟨SquirrelBomber⟩ but in ubuntu it crashes all the time
<queqiao-> ⟨lamont⟩ i used to use it fine on linux but that was probably 4-5 years ago
<queqiao-> ⟨lamont⟩ maybe more
<queqiao-> ⟨SquirrelBomber⟩ yeah, everyone says ksp works better on linux. i might try using proton but i don’t want to mod the ksp directory is steam
<queqiao-> ⟨egg⟩ ⟪SquirrelBomber⟫ i’m very much trying to avoid that lol. […] ⮪ …and so instead you are trying to make principia crash by failing to allocate?
<queqiao-> ⟨SquirrelBomber⟩ ⟪egg⟫ …and so instead you are trying to make […] ⮪ yeah that was my plan lol. i honestly just don’t really know what to do and i very much don’t want to remove principia
<queqiao-> ⟨egg⟩ …
<queqiao-> ⟨Zeusbeer⟩ Just get another 16gb of ddr5 🗿
<queqiao-> ⟨PrinceZola ùwú⟩ do yall know about KSPTOT? 👀
<queqiao-> ⟨PrinceZola ùwú⟩ wait
<queqiao-> ⟨Quadrupole⟩ Yes, but why in this channel?
<queqiao-> ⟨PrinceZola ùwú⟩ idk
<queqiao-> ⟨PrinceZola ùwú⟩ where else should i talk about it?
<queqiao-> ⟨Quadrupole⟩ Depends on what is your question. I would say #ro-general is a good place
<queqiao-> ⟨PrinceZola ùwú⟩ okie
<queqiao-> ⟨PrinceZola ùwú⟩ bye
<queqiao-> ⟨Quadrupole⟩ (KSPTOT flyby finder works with Principia btw, since you are mostly in heliocentric orbits, where three body does not matter)
<queqiao-> ⟨PrinceZola ùwú⟩ i actually have even less reason to be here as i doint have principia on my install xP
<queqiao-> ⟨PrinceZola ùwú⟩ * of reason to be here as i doint have principia on my install xP (sorry)
<queqiao-> ⟨PrinceZola ùwú⟩ i just went for the "orbital mechanics channel" aka here
<queqiao-> ⟨SpaceMarine⟩ Alright I am back because my brain is not up to task it seems of understanding how to get an intercept with venus, can someone write the steps exactly on how they do it because no matter what reference window I am in I can get one, I have also read "use ECI and then switch to a sun reference frame then switch to the body you are targetings reference frame" but I havent had luck there either.
<queqiao-> ⟨SpaceMarine⟩ am gonna load up the game again and try once more.
<queqiao-> ⟨SpaceMarine⟩ Alright I am back because my brain is not up to task it seems of understanding how to get an intercept with venus, can someone write the steps exactly on how they do it because no matter what reference window I am in I cant get one, I have also read "use ECI and then switch to a sun reference frame then switch to the body you are targetings reference frame" but I havent had luck there either.
<queqiao-> ⟨lpg⟩ > use ECI and then switch to a sun reference frame then switch to the body you are targetings reference frameThis might be your misunderstanding: there are _two_ reference frames, the one for the plotted trajectory and the one for the maneuver. You always want the maneuver frame to be ECI; it's the plotting frame you want in either heliocentric or venus-centric
<queqiao-> ⟨lpg⟩ (that's two different selectors in two different windows)
<queqiao-> ⟨SpaceMarine⟩ I see
<queqiao-> ⟨SpaceMarine⟩ yea i had that issue before i thought both had to be the same
<queqiao-> ⟨SpaceMarine⟩ which worked for my lunar stuff
<queqiao-> ⟨SpaceMarine⟩ So i want the maneuver to be ECI always when am doing stuff from earth
<queqiao-> ⟨SpaceMarine⟩ and I want to adjust my reference frame in the plotted trajectory
<queqiao-> ⟨SpaceMarine⟩ as i adjust my maneuver
<queqiao-> ⟨Al2Me6⟩ Yep. You want the maneuver frame to be the one that makes sense for actually executing the maneuver. The plotting frame is for looking at noodles.
<queqiao-> ⟨egg⟩ The noodling frame.
<queqiao-> ⟨Al2Me6⟩ Petition for officially renaming.
<queqiao-> ⟨SpaceMarine⟩ also sometimes i often get integr step error thing
<queqiao-> ⟨Stonesmile⟩ There are some cases where you want the manoeuvre to be in something other than ECI, for example GEO insertion where ECEF works, since that means insertion is retrograde no matter the current inclination
<queqiao-> ⟨SpaceMarine⟩ in orange text, what does this exactly mean? and how do i stop it
<queqiao-> ⟨SpaceMarine⟩ the steps and tolerance stuff still kinda confuses me
<queqiao-> ⟨面条参考系⟩ That's not what I meant 🤣
<queqiao-> ⟨egg⟩ Instructions unclear, renamed Al2Me6 to 面条参考系
<queqiao-> ⟨面条参考系⟩ Anyhow, my general procedure for Venus: First make a new ECI maneuver with roughly the right amount of dV (3800?) and ejection direction (you can use HCI to help judge) Then switch to Venus-Sun-Orbit and adjust the prograde dV and time to get the small loop in the noodle to approach Venus. Once you get close enough you'll likely need to adjust the two other directions too.
<queqiao-> ⟨面条参考系⟩ ⟪SpaceMarine⟫ in orange text, what does this exactly […] ⮪ Means Principia can't finish computing the flight plan under the limits you gave it.
<queqiao-> Longer plan -> more work needs to be done
<queqiao-> Smaller tolerance -> more work needs to be done
<queqiao-> Max steps -> the max amount of work you're allowing Principia to do
<queqiao-> If you set your plan length to 200 days in LEO it'll complain. Once your flight plan goes interplanetary it'll be fine.
* raptop is eggstremely confused, and now assumes that you eat reference frames (though I'm unsure of what the LD50 of Al₂Me₆ is)
<queqiao-> ⟨面条参考系⟩ Petition for officially renaming. ⮪ raptop: I was not careful in what I wished for from the egg.
<raptop> Heh
<queqiao-> ⟨SpaceMarine⟩ this is what am getting doing your method, which is "relatively" close but not what am looking for, and when i try to get it closer the periapsis disappears
<queqiao-> ⟨SpaceMarine⟩ like it wont work
<queqiao-> ⟨面条参考系⟩ Then you need a longer plan?
<queqiao-> ⟨SpaceMarine⟩ When i increase the time it doesnt change anything
<queqiao-> ⟨面条参考系⟩ Increase step count?
<queqiao-> ⟨SpaceMarine⟩ thats helped but now i cant go further from here
<queqiao-> ⟨SpaceMarine⟩ am making adjustments but i cant get a good latch around venus or anywhere practically close
<queqiao-> ⟨SpaceMarine⟩ Looks like i just needed to spend a crap ton on adjustments but i got a 230km periap
<queqiao-> ⟨Quadrupole⟩ Did you adjusted the departure tume?
<queqiao-> ⟨Quadrupole⟩ * time?
<queqiao-> ⟨Quadrupole⟩ Ideally you should not need normal component
<queqiao-> ⟨SpaceMarine⟩ departure time didnt get anything for me in terms of getting a closer encounter
<queqiao-> ⟨SpaceMarine⟩ closest is like 35,000,000
<queqiao-> ⟨SpaceMarine⟩ just on departure and tangent
<queqiao-> ⟨Quadrupole⟩ That sounds wrong. You got the right LAN from TWP?
<queqiao-> ⟨SpaceMarine⟩ yes
<queqiao-> ⟨SpaceMarine⟩ i launched into it
<queqiao-> ⟨SpaceMarine⟩ correct inclination as well
<queqiao-> ⟨面条参考系⟩ I’ve personally had a lot more luck with Butcher’s script than TWP
<queqiao-> ⟨面条参考系⟩ +for launch LANs
<queqiao-> ⟨Quadrupole⟩ ⟪SpaceMarine⟫ yes ⮪ How does your TWP window look?
<queqiao-> ⟨SpaceMarine⟩ How would you change inclination in principia? say for doing GTO
<queqiao-> ⟨Stonesmile⟩ Same as without principia. For GEO insertion though, you can set the reference frame of the burn to be ECEF and burn retrograde
<queqiao-> ⟨SpaceMarine⟩ So i can just make a maneuver in mechjeb
<queqiao-> ⟨SpaceMarine⟩ and change inclination to 0.
<queqiao-> ⟨SpaceMarine⟩ ?
<queqiao-> ⟨Stonesmile⟩ No, you need to do it manually, but it's just adding to the "normal" direction (pink)
<queqiao-> ⟨SpaceMarine⟩ i guess i use the ingame contract overlay of where geostationary is?
<queqiao-> ⟨SpaceMarine⟩ as i need something to aim for
<queqiao-> ⟨Stonesmile⟩ Refernce frame - ECEF shows it best
<queqiao-> ⟨Stonesmile⟩ * Reference
<queqiao-> ⟨egg⟩ You can transfer to a circular orbit around 3600 km, and then adjust while looking at ECEF or at the analyser
<queqiao-> ⟨SpaceMarine⟩ you mean 36000 right
<queqiao-> ⟨SpaceMarine⟩ not 3600?
<queqiao-> ⟨SpaceMarine⟩ seems oddly specific if it is 3600
<queqiao-> ⟨egg⟩ yeah, 36 000.
<queqiao-> ⟨SpaceMarine⟩ wouldnt that be super inefficient though
<queqiao-> ⟨SpaceMarine⟩ since you want to do the inclination change during
<queqiao-> ⟨SpaceMarine⟩ the transfer to 36,000
<queqiao-> ⟨egg⟩ I don’t mean actually doing the transfer, then changing things. I mean roughly planning a transfer to an equatorial orbit around 36 000 km, then adjusting that plan looking at the noodles ECEF or looking at the analysis for the planned final orbit.
<queqiao-> ⟨SpaceMarine⟩ Okay
<queqiao-> ⟨SpaceMarine⟩ am getting either impossible or very high delta v to do the GTO and inclination change in the same burn, is that just baiknour launch or
<queqiao-> ⟨SpaceMarine⟩ am i doing something wrong
<queqiao-> ⟨面条参考系⟩ !geo still applies
<queqiao-> ⟨面条参考系⟩ It's just easier to eyeball the GEO insertion in ECEF
<queqiao-> ⟨SpaceMarine⟩ oh am being stupid
<queqiao-> ⟨SpaceMarine⟩ lmao
<queqiao-> ⟨SpaceMarine⟩ i was doing it wrong lol, god am out of practise
<queqiao-> ⟨SpaceMarine⟩ thought you did the transfer and inclination change in the same burn
<queqiao-> ⟨SpaceMarine⟩ alright nvm