egg|nomz|egg 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.
<bofh>
!wpn egg|anbo|egg
* Qboid
gives egg|anbo|egg a theory
<UmbralRaptop>
The theory requires additional photons?
<egg|anbo|egg>
!wpn bofh and UmbralRaptop
* Qboid
gives bofh and UmbralRaptop a cerium traversal
<egg|anbo|egg>
!pet bofh and UmbralRaptop
* Qboid
pets bofh and UmbralRaptop
<bofh>
!pet egg|anbo|egg, UmbralRaptop
* Qboid
pets egg|anbo|egg, UmbralRaptop
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<egg|anbo|egg>
bofh: also you had tightened the cat's dovetail quite a bit, we had to use a wrench to open it Ꙩ_ꙩ
<kmath>
<whitequark> substituted arylcyclohexamines inhibit dorsal horn neurons, altering muscle activation patterns to make you potenti… https://t.co/2iEKifF1FK
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<bofh>
egg|anbo|egg: so I'm not on those :p it's more paranoia that it'd fall out and overshooting quite a bit, apparently. apologies.
<bofh>
also I don't know if the Stellarium Iridium orbits are accurate... if they're using SGP4 on them, it might be off by a few arcseconds from what you saw
<UmbralRaptop>
o_O
<B787_300>
...
<B787_300>
what are you doing that ArcSec matters
<bofh>
s/seconds/minutes/
<Qboid>
bofh meant to say: also I don't know if the Stellarium Iridium orbits are accurate... if they're using SGP4 on them, it might be off by a few arcminutes from what you saw
<bofh>
B787_300: trying to reconcile an observation of what sounds exactly like an older Iridium sat with stellarium claiming it should be *just* outside the telescope field of view?
<kmath>
<✔planet4589> The SES-14 satellite, misdelivered by Ariane 5 in January, finally arrived on station in geostationary orbit at 39.… https://t.co/vbIulLhP7M
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<UmbralRaptop>
yay
<bofh>
I mean misdelivered to orbit with the wrong inclination but otherwise fine is honestly about the nicest failure case you can get that isn't just an outright success, I think.
<UmbralRaptop>
;8ball am I going to end up putting together phase folding code?
<kmath>
UmbralRaptop: Without a doubt
<UmbralRaptop>
;8ball Is the code going to be ill-conditioned?
<kmath>
UmbralRaptop: Better not tell you now
<UmbralRaptop>
bofh: for additional successful failures, see Hipparcos?
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<bofh>
UmbralRaptop: oh, AKM failure?
<bofh>
also wikipedia defaulted to .fr and I am slowly starting to understand these more and more so I'll just leave it be :p
<UmbralRaptop>
AKM?
* UmbralRaptop
is reasonably certain that's not a tyop of AK-M.
<bofh>
apogee kick motor
Majiir is now known as Snoozee
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<UmbralRaptop>
Ah
<B787_300>
bofh: why are you trusting stellarium? also how good is your location and which TLE set are you using
<bofh>
B787_300: I mean *my entire point* is that I suspect that stellarium is not to be trusted if it just does SGP4, which is likely the case...
<B787_300>
bofh: i dont think stellarium does SGP4... i would bet on 2body
<B787_300>
although with modern computers why dont we all just use numerical
<B787_300>
so much more accurate
<B787_300>
also UmbralRaptop i am low key freaking out about this week
<UmbralRaptop>
How so?
<B787_300>
the conference and presentation
<B787_300>
first one ever for me
<UmbralRaptop>
Ah. Something something practice.
<UmbralRaptop>
If it's any comfort, everyone is scared for their first n talks. Sometimes n is approximately \aleph_0
<B787_300>
i have been, even went into work to do some more practice today
<UmbralRaptop>
;8ball Is Trump going to bomb Iran?
<kmath>
<✔planet4589> In 10 minutes it will be the 19th anniversary of the launch of @chandraxray - here's to many more years of science!
<iximeow>
oo!
<iximeow>
\o/
<iximeow>
also great news: coastal southern california in the summer does not make for good seeing
<UmbralRaptop>
Obviously you should take a road trip to Kitt Peak.
<iximeow>
not a bad idea
<iximeow>
though the i-5-south-until-you're-there route is a little horrifying (even just driving towards san diego i've noticed there's consistent california or federal police ~~stuff~~ happening..)
<UmbralRaptop>
fun
<iximeow>
s/federal police/cbp/ whatever
<bofh>
oh neat there's some accident on the track so my route just went from Venlo-Amsterdam to Venlo-Eindhoven-Amsterdam.
<bofh>
is this just going to result in me traversing western europe via hamiltonian path ultimately,
<bofh>
ROFL HOW AM I GETTING EDUROAM
<egg|anbo|egg>
bofh: B787_300: ok so clearly i should use principia to figure out what i'm seeing
<egg|anbo|egg>
bofh: UmbralRaptop: also i don't see all the stars i see in stellarium, clearly i should dump simbad into principia,
<egg|anbo|egg>
SGP?
<egg|anbo|egg>
!acr -add:SGP Simplified General Perturbations
<Qboid>
egg|anbo|egg: I added the explanation for this acronym.
<egg|anbo|egg>
!acr -add:SDP Simplified Deep Space Perturbations
<Qboid>
egg|anbo|egg: I added the explanation for this acronym.
<egg|anbo|egg>
UmbralRaptop: "The original SGP model was developed by Kozai in 1959"
<egg|anbo|egg>
古在！
<egg|anbo|egg>
!wpn bofh
* Qboid
gives bofh an int nova
<egg|anbo|egg>
bofh: i am confused at your path
<bofh>
egg|anbo|egg: SIMBAD?
<egg|anbo|egg>
SIMBAD?
<Qboid>
egg|anbo|egg: [SIMBAD] => Set of Identifications, Measurements, and Bibliography for Astronomical Data
<bofh>
oh, perfect. I take it they converse with the ViZiER?
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<egg|phone|egg>
!Seen whitequark
<Qboid>
egg|phone|egg: I last saw whitequark on [16.07.2018 03:10:08] in #kspacademia saying: "none of this really matters for household use"
<whitequark>
i
<egg|anbo|egg>
whitequark: we put a fuse back onto phase 2 and it held, turns out that when there isn't ~1 Ω between phases the lead wire is happier :-p
* egg|anbo|egg
still fascinated by the people who joined phases 1 and 2 at a screw terminal and didn't notice Ꙩ_ꙩ
<egg|anbo|egg>
also at the fact that this has been going on for > 10 years
<whitequark>
lol
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<whitequark>
impressive
<egg|anbo|egg>
whitequark: did you get the pictures from bofh
<whitequark>
no
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<egg|anbo|egg>
hmm
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<egg|anbo|egg>
bofh: your whitequark interchange channel appears to be faulty >_>
<egg|anbo|egg>
whitequark: we were out of pre-cut fuses and the fuse holders in this fairly old installation don't take fuse cartridge, so we used old-stlye fusible wire
<egg|anbo|egg>
whitequark: context: some literal shit pump developed a ground fault during the night between saturday and sunday, which we found was on phase 1 by fuse removal
<egg|anbo|egg>
we looked at the phase 2 fuse, and it was blown; but nothing appeared to be on phase 2 (and the only triphase device, the hot plate in the kitchen, was working fine)
<egg|anbo|egg>
thus, having unplugged the faulty pump, we proceeded to make a fuse for phase 2
<egg|anbo|egg>
whitequark: both the BU phase, BN neutral wire and the 1 = 2 are by the same people i think
<egg|anbo|egg>
whitequark: somehow they managed to ignore the phase 2 fuse (220 V, 16 A) blowing with unloaded 380 V, and thus everything worked fine because whatever was on phase 2 ended up actually being on 1 (and the only triphase device is star rather than triangle)
<egg|anbo|egg>
(star *and doesn't care about phase*, since it's just the various fires of the hot plate)
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<egg|anbo|egg>
!wpn UmbralRaptop
* Qboid
gives UmbralRaptop a Legendre DWARF with a radiography attachment
<kmath>
<jeff_foust> Hertz says TESS should begin science observations some time around the end of the month (which is next week.)
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<awang>
Hubble was on 60 Minutes yesterday
<awang>
Still churning out really nice images
<B787_300>
awang: now we just need luvoir
<B787_300>
Then we can get even better pics
* UmbralRaptop
eyes JWST delays and that $5e9 cost cap.
<B787_300>
UmbralRaptop: something something something economies of scale and past experience?
<UmbralRaptop>
B787_300: lolsob
<B787_300>
I mean they are also doing a trade study of making it smaller so it can launch on a different rocket
<B787_300>
And not run into the jwst issues
<B787_300>
Also would they need to use the berrilium mirrors? As that was a big cost drive driver iirc as they had to make a full casting and milling system in a hermetically sealed environment because berrilium dust is toxic to humans
<UmbralRaptop>
Unsure.
<B787_300>
Hrm it seems like yes they would because of how light the be mirrors are
<B787_300>
And now that they have the production process down...
<APlayer>
Random idea: Why not manufacture the mirrors under destilled water or a different inert liquid?
<APlayer>
Well, beryllium, yes. Makes sense they don't do it under water. But there are other inert liquids
<UmbralRaptop>
B787_300: Hopefully. OTOH, none of the 4 proposed missions are going to be built until WFIRST's funding wedge starts shrinking.
<B787_300>
Lol you think that will happen...
<awang>
Space telescopes appear to be too hard :(
<awang>
Also, I like how clang produces almost twice the assembly for this thing on godbolt compared to gcc
<APlayer>
Well, we do have adaptive optics that nearly cancel atmospheric distortion now
<awang>
Wonder if it actually translates to a performance difference
<awang>
APlayer: Doesn't help for UV, unfortunately
<awang>
Not sure about other wavelengths
<awang>
Or noise
<APlayer>
awang: From experience, if some code compiles to a larger size, it'll also be slower
<awang>
APlayer: Can't argue with that
<awang>
Guess the real question was whether the code size difference would translate to a corresponding performance difference
<APlayer>
Most likely yes
<awang>
Oh wow
<awang>
Looks like a huge chunk was RTTI/exception stuff
<APlayer>
As for UV, yes, point taken
<awang>
Originally, 1022 lines assembly vs 541 on godbolt
<awang>
After -fno-exceptions -fno-rtti, 669 lines vs 523
<awang>
Scary
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<kmath>
<jeff_foust> Hertz: ESA told us there’s no problem having Ariane 5 available for March 2021 launch of Webb. ⏎ Q: what if there are… https://t.co/pxPbfhUUNx
<bofh>
egg|cell|egg: yeah, your past few days sounded "entertaining"
<bofh>
I mean tbh so did mine, so...
<egg|cell|egg>
Oh?
<UmbralRaptop>
B787_300: Hah!
* UmbralRaptop
🔪 the sky in the ☁
<bofh>
egg|cell|egg: so a random sequence of events on Sunday: @Zaikarion: "marasy8 is doing a livestream right now", me: "cool, let me get to the I.G. Farben building" Z: ??? me: it has eduroam, chsirs & A/C. Z: oh, that makes sense
<iximeow>
UmbralRaptop: ++
<UmbralRaptop>
bofh: having access to eduroam is usually fun. But sometimes Fun.
<UmbralRaptop>
iximeow: I'm starting to think that Mars is cursed.
<bofh>
then I find the doors to be somewhat irritatingly sticky, but get them open walkimg in a security guard chases after me and starts rspid-fire rsmbling in German, I reply that I don't speak German and he says the door was closed and locked and how did I get in snd I have to leave
<bofh>
so I played it off as clueless tourist meeting someone but yeah it seems I accidentally broke into the I.G. Farben building
<bofh>
and that's, like, one incident, rofl.
<UmbralRaptop>
Hah
<iximeow>
UmbralRaptop: why?
<UmbralRaptop>
iximeow: Or maybe just me. I started getting seriously into amateur astronomy in 2007. The opposition then was eh, and well, every one up to 2016 was bad.
<UmbralRaptop>
That one I finally saw surface features on Mars. With the local astronomy club's 16" scope. (They weren't visible in the 14)
<iximeow>
i guess i don't have a feel for what is good then - i only really started like.... a year ago, telescopes were only a few months ago :P
<iximeow>
ooh
<iximeow>
yeah i could make out a colored smudge of some terrain a few days ago but i blamed that largely on LA-ish area being miserable seeing
<UmbralRaptop>
And this time around, we have a global dust storm.
<iximeow>
\o/
<UmbralRaptop>
(please don't die, Oppy)
<egg|cell|egg>
Bofh: O_o
<UmbralRaptop>
egg|cell|egg: Given what I know of bofh, accidentally breaking into a major drug manufacturer is extremely on brand.
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<bofh>
UmbralRaptop: so if I.G. Farben is still manufacturing drugs, I have like infinite questions.
<bofh>
(it's a part of Wolfgang Goethe-Universität :P)
<bofh>
(I.G. Farben itsself got diced up into BASF, AGFA, Bayer & Sanofi)
<UmbralRaptop>
Oops
<UmbralRaptop>
Just to confirm, WW2 lasted from 1937 to 1945, right?
<bofh>
iirc, yes.
<UmbralRaptop>
Okay, probably no timeline shenanigans were involved.
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<awang>
What
<awang>
Replacing a std::vector with a boost::circular_buffer dropped about 600 lines of assembly from a previous total of 1000
<awang>
I'm very confused
<awang>
It's basically replacing a combination of vec.emplace(std::begin(vec), val)); vec.pop_back() with buf.push_front()