raptop changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer. | We can haz pdf
<Ellied> whitequark: whenever you get this, I have a question for you... https://en.wikipedia.org/wiki/Hydrogen_fluoride lists a refractive index of very nearly unity. Is this A) nonsense, B) referring to the gaseous form, not the liquid, or C) really saying that pure liquid HF is nearly invisible in air?
<galois> [WIKIPEDIA] Hydrogen fluoride | "Hydrogen fluoride is a chemical compound with the chemical formula HF. This colorless gas or liquid is the principal industrial source of fluorine, often as an aqueous solution called hydrofluoric acid. It is an important feedstock in the preparation of many important compounds including pharmaceuticals..."
<Ellied> I ask you because someone told me you had some HF.
SakuraRaptor is now known as UmbralRaptor
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<mofh> Ellied: so not sure in general, but "pure liquid HF"? keep in mind that its azeotropic point with water is only ~37%
<Ellied> oh. is pure liquid HF not a thing, then?
<Ellied> I recall that e.g. fluoroantimonic acid is generally not prepared with water as a solvent since its hydration is too exothermic, and I think wikipedia says it's generally prepared in anhydrous HF
<mofh> I mean anhydrous HF *is* a thing, just generally not what one sees.
<Ellied> ah.
<mofh> it's much less used, basically
<mofh> Anyway I'd ask /r/chemistry or something, imho.
<whitequark> Ellied: yeah mine is 5%
<egg> Ellied!
<egg> !wpn Ellied
* galois gives Ellied a technetium dodecahedron
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<egg> Ellied: mofh: whitequark: https://pubs.acs.org/doi/10.1021/j100785a504
<egg> mofh: why use reddit when there is the literature
<egg> mofh: gah, SP3 files can have bad or absent data for positions or velocities
<egg> mofh: so I need to represent that not as a trajectory, but as a sequence of trajectories...
<mofh> egg: I mean I assume Ellied wants pictures, which the literature may or may not have. but otherwise, yeah
<mofh> egg: also wait, absent data for *positions*? what the hell?
<kmath> YouTube - Is So Yummy the WORST baking channel on YouTube?
<mofh> also fuck this headache
<egg> mofh: well sure, they can have missing datapoints
<egg> it's just that it's annoying to handle that on my side
<egg> mofh: tbh only one of the sample files I have has that
<egg> one point for C07, then a bunch of missing data, then it's back continuously
<mofh> lmao what the hell, you sure that isn't a bug on the end of the person releasing that sample file?
<egg> there *are* gaps
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<egg> SSA?
<egg> galois?
<egg> AC?
<egg> LCA?
<galois> LCA: LEGOS/CLS Analysis Center
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<egg> ah, SSALTO
<egg> SSALTO?
<galois> SSALTO: Segment-Sol multi-missions d’ALTimétrie, Orbitographie et localisation précise
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<egg> LCA?
<galois> LCA: LEGOS/CLS Analysis Center
<egg> LEGOS?
<galois> LEGOS: Laboratoire d’Études en Géophysique et Océanographie Spatiales
<egg> CLS?
<galois> CLS: Collecte Localisation Satellites
<UmbralRaptor> hrm, need to work on my framing https://photos.app.goo.gl/7sTe8TAf2Bf6w11q6
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<egg> !acr -update:SSALTO Segment-Sol multi-missions d’ALTimétrie, Orbitographie et localisation précise
<galois> Invalid command. Valid forms: !acr -add:LMAO Lagrange Made Awesome Orbits, !acr -redef:ROFL Rare Occultations for Life, !acr -del:IEEE
<egg> !acr -redef:SSALTO Segment-Sol multi-missions d’ALTimétrie, Orbitographie et localisation précise
<galois> Definition added!
<egg> whitequark: how bad is this acronym ^
<whitequark> pff
<egg> STARLETTE?
<galois> STARLETTE: Satellite de Taille Adaptée avec Réflecteurs Laser pour les ÉTudes de la TErre
<egg> whitequark: I like the utterly silly "de Taille Adaptée" here ^
<egg> appropriately-sized,
<egg> as opposed to an inadequately-sized satellite I guess
<_whitenotifier-3d18> [Principia] eggrobin opened pull request #2125: Computed velocities and GRGS dialect - https://git.io/fjtqM
<_whitenotifier-3d18> [Principia] Pending. Build queued… - 
<_whitenotifier-3d18> [Principia] Pending. Building… - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3536/
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<_whitenotifier-3d18> [Principia] eggrobin synchronize pull request #2125: Computed velocities and GRGS dialect - https://git.io/fjtqM
<_whitenotifier-3d18> [Principia] Pending. Build queued… - 
<whitequark> it's fine
<egg> whitequark: note: there are many more dialects, I had a hard time finding a single conformant SP3-b file for instance
<egg> whitequark: you have to pick a sufficiently late (but not too late or they will have switched to SP3-c) file from MCC (MCC being the 3-letter analysis centre code for ЛОАЦ ЦУП, Лазерный Операционно-Аналитический Центр - Центр Управления Полётами)
<egg> earlier MCC emits files that are almost b, but have the version field set to a
<egg> and the others switch to setting version to b earlier, but then put data in the wrong columns
<whitequark> cursed
<egg> whitequark: the format is reasonably sane to start with, see the docs in https://github.com/mockingbirdnest/Principia/blob/103a2bf31ded6ecf0d6a6c4b735b1c19ee5c835f/astronomy/standard_product_3.hpp#L24-L29; but then everybody screws up the implementation in increasingly creative ways
<egg> I have to admire GRGS who manages to use the wrong unit of speed and to somehow not have noticed
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<_whitenotifier-3d18> [Principia] Failure. Build finished. - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3536/
<_whitenotifier-3d18> [Principia] Pending. Building… - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3537/
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<_whitenotifier-3d18> [Principia] eggrobin synchronize pull request #2125: Computed velocities and GRGS dialect - https://git.io/fjtqM
<_whitenotifier-3d18> [Principia] Pending. Build queued… - 
<_whitenotifier-3d18> [Principia] pleroy reviewed pull request #2125 commit - https://git.io/fjtmQ
<_whitenotifier-3d18> [Principia] pleroy reviewed pull request #2125 commit - https://git.io/fjtm7
<_whitenotifier-3d18> [Principia] pleroy reviewed pull request #2125 commit - https://git.io/fjtm5
<_whitenotifier-3d18> [Principia] pleroy reviewed pull request #2125 commit - https://git.io/fjtmd
<_whitenotifier-3d18> [Principia] pleroy reviewed pull request #2125 commit - https://git.io/fjtmF
<_whitenotifier-3d18> [Principia] Failure. Build finished. - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3537/
<_whitenotifier-3d18> [Principia] Pending. Building… - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3538/
<mofh> 20:49:30 <@egg> I have to admire GRGS who manages to use the wrong unit of speed and to somehow not have noticed
<mofh> Yeah that's, um, legendarily.
<egg> I don't understand how that's not caught
<egg> it's not something where a different parser might have ignored that nonconformance
<mofh> Like it REALLY SHOULD'VE BEEN.
<egg> if you use the data, you see it is crap
<egg> so i guess nobody uses the GRGS velocities
<Raptop> GRGS?
<galois> GRGS: Groupe de Recherche de Géodésie Spatiale
<_whitenotifier-3d18> [Principia] Success. Build finished. - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3538/
<kmath> <✔mbeisen> Now that flipped classrooms are all the rage, maybe we should consider flipped labs in which the grad students sit… https://t.co/gkLLrMb4gV
<egg> mofh: whitequark: huh, trains run on the right in RU a lot of places https://en.wikipedia.org/wiki/Double-track_railway#/media/File:European_railtrafficregions.png
<galois> [WIKIPEDIA] Double-track railway#/media/File:European railtrafficregions.png | "A double-track railway usually involves running one track in each direction, compared to a single-track railway where trains in both directions share the same track...."
<mofh> Huh, TIL.
<mofh> I am suddenly really glad that I randomly decided to backup my old laptop contents while at ANBO back in July
<mofh> since it meant I had basically no dataloss when shit got stolen in August, instead of, well, not quite "my entire thesis" levels of bad, but it would've been a pretty big problem.
<egg> mofh: yeah that kind of shit makes the news every now and then
<egg> mofh: the ghost of future laptop theft etc.