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
<egg> !acr -add:NAQU Notice Advisory to QZSS Users
<galois> Definition added!
<egg> QZSS?
<galois> QZSS: Quasi-Zenith Satellite System
<egg> hah, you can get NAQUs on twitter
<egg> mofh: hm, i think i might zzz instead
<egg> !choose zzz|notzzz
<galois> egg: Your options: zzz, notzzz. My choice: zzz
<egg> z
<mofh> NAQU?
<galois> NAQU: Notice Advisory to QZSS Users
<mofh> ahh
egg is now known as egg|zzz|egg
<egg|zzz|egg> NAGU?
<galois> NAGU: Notice Advisory to Galileo Users | Notice Advisory to GLONASS Users
<egg|zzz|egg> ЦУС?
<egg|zzz|egg> СПСГ?
<galois> СПСГ: Сообщение Потребителям Системы ГЛОНАСС
<egg|zzz|egg> mofh: apparently 北斗 does not have an egguivalent to NANU/СПСГ-NAGU/NAGU/NAQU
<egg|zzz|egg> mofh: also why am i neither sleeping, playing soviet republic, or writing that GNSS SPR test
UmbralRaptor has quit [Remote host closed the connection]
e_14159 has quit [Ping timeout: 190 seconds]
e_14159 has joined #kspacademia
UmbralRaptop has joined #kspacademia
egg|laptop|egg has quit [Ping timeout: 183 seconds]
egg|laptop|egg has joined #kspacademia
<egg|zzz|egg> !acr -add:FPGA Field Programmable Gate Array
<galois> Definition added!
<egg|zzz|egg> whitequark: I'm seeing that in an acronym list at the beginning of the springer handbook of GNSS, are FPGAs used for GNSS stuff?
<whitequark> sure
<egg|zzz|egg> !acr -add:FRPA Fixed Radiation Pattern Antenna
<galois> Definition added!
<egg|zzz|egg> whitequark: what for?
<egg|zzz|egg> WATFOR?
<galois> WATFOR: WATerloo FORTRAN
<egg|zzz|egg> >_>
<egg|zzz|egg> cc mofh
<egg|zzz|egg> "In an SDR, hardware and software technologies are used in parallel Part C | 13.2 to generate a reconfigurable solution. The goal is the ability to update the system by software changes. In any case, an analog front-end down to the ADC will be present: on the processor side, an field programmable gate array (FPGA), an MP or a general purpose computer or a mix of such a processor could be used"
<egg|zzz|egg> !acr -add:ADC Analog-to-Digital Converter
<galois> Definition added!
<egg|zzz|egg> this acronym list is a nice mix of aerospace acronym and eleggtronics acronym
<egg|zzz|egg> !acr -add:SDR Software Defined Radio
<galois> Definition added!
<egg|zzz|egg> whitequark: "In GNSS software receivers, a general purpose processor is used: e.g., an Intel PC or an advanced risk machine (ARM) processor. All signal processing is programmed in a higher programming language like C/C++" << I don't think that's the right spelling of "RISC"
<whitequark> lol
<egg|laptop|egg> ECOM?
<galois> ECOM: Empirical CODE Orbit Model
<egg|laptop|egg> UmbralRaptop: mofh: oh no, there's a GPS draconitic year
<egg|laptop|egg> which is about 14 days shorter than the sidereal one
<egg|laptop|egg> !acr -add:MCAS Maneuvering Characteristics Augmentation System
<galois> Definition added!
<egg|laptop|egg> EOP?
<egg|laptop|egg> !acr -add:EOP Earth Orientation Parameters
<galois> ...
<egg|laptop|egg> IERS?
<egg|laptop|egg> !acr -add:IERS International Earth Rotation and reference systems Service
<galois> ...
<whitequark> why does galois do that
<whitequark> IERS?
<galois> IERS: International Earth Rotation and reference systems Service
<egg|laptop|egg> whitequark: I think galois does ... if it repeats the same thing too much
<egg|laptop|egg> FPGA?
<galois> FPGA: Field Programmable Gate Array
<egg|laptop|egg> FPGA?
<galois> FPGA: Field Programmable Gate Array
<egg|laptop|egg> FPGA?
<galois> FPGA: Field Programmable Gate Array
<egg|laptop|egg> FPGA?
<galois> FPGA: Field Programmable Gate Array
<egg|laptop|egg> FPGA?
<galois> FPGA: Field Programmable Gate Array
<egg|laptop|egg> HM.
<egg|laptop|egg> apparently it's more complicated than that
<egg|laptop|egg> also i think we have now lifted any doubts as to the meaning of FPGA
<egg|laptop|egg> !wpn
* galois gives egg|laptop|egg a pentagon
<whitequark> lol
<egg|laptop|egg> !wpn whitequark
* galois gives whitequark a uranium spork
<egg|laptop|egg> !u ˸ʬ˸
<galois> ˸: U+02f8 MODIFIER LETTER RAISED COLON
<galois> ʬ: U+02ac LATIN LETTER BILABIAL PERCUSSIVE
<galois> ˸: U+02f8 MODIFIER LETTER RAISED COLON
<kmath> <sundevour> today in "unicode loves slightly shifted homoglyphs" ⏎ ⏎ i have improved the Stacked Cats emoticon ⏎ ˸ʬ˸
<egg|laptop|egg> mofh: meow
<egg|laptop|egg> huh, the next Galileo satellite is supposed to be launched on an Ariane 6?
<egg|laptop|egg> UmbralRaptop: also it is called Patrick
* UmbralRaptop blinks
APlayer has joined #kspacademia
<egg|laptop|egg> UmbralRaptop: the ones that have been launched are, in launch order, Thijs, Наталия, David, Sif, Milena, Doresa, Αναστασία, Adam, Alba, Oriana, Andriana, Liene, Danielė, Alizée, Lisa, Kimberley, Tijmen, Antonianna, Nicole, Zofia, Alexandre, Irina, Samuel, Anna, Ellen, and Tara
<egg|laptop|egg> whitequark: a bit like https://twitter.com/whitequark/status/998668501270265857 but names ^
<kmath> <whitequark> "show me the most European picture ever taken" https://t.co/aqWvDrtAK7
<galois> [WIKIPEDIA] List of Galileo satellites | "This is a list of past and present satellites of the Galileo navigation system. As of February 2019, 22 satellites are declared operational, 2 satellites placed in non-nominal orbit are declared in testing, and 2 satellites are currently not usable. The two GIOVE prototype vehicles were retired in 2012..."
<egg|laptop|egg> ... amusingly the one that has yet to be launched is the GB one
<UmbralRaptop> Will it launch before 2019-10-31?
<egg|laptop|egg> no, scheduled 2020
<egg|laptop|egg> there's no Croatian name, because the drawing competition was before 2013
<mofh> egg|laptop|egg: meow
<egg|laptop|egg> mofh: CDDIS
<egg|laptop|egg> mofh: if you host a mirror of CDDIS and friends on ~pbarfuss, is it WatDIS
<mofh> LOL
<egg|laptop|egg> (of course the server then has to be written in WATFOR)
<mofh> ...I think I might still know a physics prof there that might be interested in th--ROFL
<mofh> I keep forgetting that's actually a think that eggsisted once.
<egg|laptop|egg> also,
<egg|laptop|egg> WATFIV?
<galois> WATFIV: WATerloo FORTRAN IV
<UmbralRaptop> Ꙩ_ꙩ
<egg|laptop|egg> mofh: anyway, WatDIS,
<egg|laptop|egg> mofh: also underlying-1-step-method
<egg|laptop|egg> !wpn котеньке
* galois gives котеньке a adobe floppy disk
<egg|laptop|egg> mofh: derp, I accidentally referred to 2000-01-01T00:00:00 (UTC) Check failed: (year - 1972) * 2 + 1 < leap_seconds.size()
<egg|laptop|egg> s/2000/2020/
<galois> egg|laptop|egg meant to say: mofh: derp, I accidentally referred to 2020-01-01T00:00:00 (UTC) Check failed: (year - 1972) * 2 + 1 < leap_seconds.size()
<mofh> Oups
APlayer has quit [Ping timeout: 190 seconds]
<egg|laptop|egg> whitequark: https://twitter.com/whitequark/status/1117460082437046272 hm, are you saying i should use FPGAs in principia,
<kmath> <whitequark> @JamesWidman @sigfig love too shipping my game with a CLI that mostly runs on an FPGA
<whitequark> sure
<whitequark> we could offload parts of simulation to a ECP5, maybe
<egg|laptop|egg> whitequark: mofh: I have come across http://ftp.aiub.unibe.ch again
<_whitenotifier-3d18> [Principia] MorePortal opened issue #2134: Random Crashes - https://git.io/fjmoy
<egg|laptop|egg> HTTP://FTP.
<egg|laptop|egg> some transfer protocol—never mind which one precisely—
<kmath> <davbayless> @justsaysinmice Look @ this account, totally dismissive of preventing obesity in future mouse generations *rollseyes*
<kmath> <johncarlosbaez> When I first went to Paris I fell in love with the city, like most people do. And I started trying to visit all th… https://t.co/Fx9I2l7s4R
<egg|laptop|egg> !acr -add:IGGBSPM Institute of Geodesy and Geophysics BeiDou Solar Pressure Model
<galois> Definition added!
egg|laptop|egg has quit [Ping timeout: 198 seconds]
egg|laptop|egg has joined #kspacademia
<egg|laptop|egg> !acr -add:CNSC China Satellite Navigation Conference
<galois> Definition added!
<egg|laptop|egg> mofh: whitequark: I feel like I am going down a very deep rabbit hole of GNSS madness
<egg|laptop|egg> mofh: also I think I'm going to use the entire reduced ECOM model instead of just radial bullshit, it's just as easy,
<egg|laptop|egg> oh hey these CNSC proceedings talk about PANDA
* UmbralRaptop tries to get an understanding of Christoffel symbols to solve a problem.
<mofh> reduced ECOM model?
<mofh> egg|laptop|egg: I've been to a good chunk of those streets, at least the ones in 5e
* UmbralRaptop sees in the solution that no Christoffel symbols are used, and the answer is completely different
<_whitenotifier-3d18> [Principia] pleroy commented on issue #2134: Random Crashes - https://git.io/fjmKz
<egg|laptop|egg> ECOM?
<galois> ECOM: Empirical CODE Orbit Model
<egg|laptop|egg> mofh: ^ an SRP model
<egg|laptop|egg> UmbralRaptop: what is the problem
<egg|laptop|egg> UmbralRaptop: also try repeatedly swatting mofh for physics help
<_whitenotifier-3d18> [Principia] MorePortal commented on issue #2134: Random Crashes - https://git.io/fjmKP
<mofh> I mean my GR knowledge is really not great >_>
<egg|laptop|egg> mofh: *swat*
<egg|laptop|egg> GRACE?
<galois> GRACE: Gravity Recovery And Climate Experiment
UmbralRaptop has quit [Quit: Bye]
UmbralRaptop has joined #kspacademia
<egg|laptop|egg> UmbralRaptop: I came across the identifier umbral_half_aperture
<UmbralRaptop> uh
egg|laptop|egg has quit [Ping timeout: 198 seconds]
<_whitenotifier-3d18> [Principia] pleroy opened pull request #2135: Avoid dangling pointer to the plugin - https://git.io/fjmit
<_whitenotifier-3d18> [Principia] Pending. Build queued… - 
<_whitenotifier-3d18> [Principia] Pending. Building… - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3555/
egg|laptop|egg has joined #kspacademia
<egg|laptop|egg> UmbralRaptop: it's in code that you wrote
<UmbralRaptop> oh, right
* UmbralRaptop recalls getting devoured by triangles
<_whitenotifier-3d18> [Principia] eggrobin labeled pull request #2135: Avoid dangling pointer to the plugin - https://git.io/fjmit
<_whitenotifier-3d18> [Principia] Success. Build finished. - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3555/
<B787_300> UmbralRaptop: so if we can combine observations from radio waves to be able to see stuff super far away (the EHT) why cant we do it with optical obs?
<UmbralRaptop> B787_300: I think too dim, mainly? Chara has some silly bright magnitude limits
<B787_300> one of the benefits of combine was getting a super large apererture right? which allowed for better resolving, so why not do that to direct image exoplanets
<_whitenotifier-3d18> [Principia] pleroy closed pull request #2135: Avoid dangling pointer to the plugin - https://git.io/fjmit
<_whitenotifier-3d18> [Principia] pleroy pushed 2 commits to master [+0/-0/±10] https://git.io/fjmib
<_whitenotifier-3d18> [Principia] pleroy 649c9cb - Remove plugin_ from everywhere.
<_whitenotifier-3d18> [Principia] pleroy 0213c4b - Merge pull request #2135 from pleroy/Crash Avoid dangling pointer to the plugin
<UmbralRaptop> I should go hunting for the studies, but the idea exists. I *think* there's been a lack of work because of practical problems.
<UmbralRaptop> hrm. Back of the envelope calculations suggest that you'd want at least a 10-15 km baseline for planets around prox cen
<UmbralRaptop> Also, I vaguely recall something about needing or wanting to do this in orbit?
<B787_300> could it be a noise floor issue?
<UmbralRaptop> possibly
* UmbralRaptop glares at the atmosphere
<B787_300> like to get the noise low enough you need cyrocooled sensors (or maybe this is where you would want the super sensitive sensors like photo multiplier tubes)
<_whitenotifier-3d18> [Principia] pleroy opened pull request #2136: Render the guidance node in the adapter and not in the flight planner - https://git.io/fjmP4
<_whitenotifier-3d18> [Principia] Pending. Build queued… - 
<_whitenotifier-3d18> [Principia] Pending. Building… - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3556/
<UmbralRaptop> B787_300: on the upside, cryocooled detectors are already common
<egg|laptop|egg> Вернуть Валшаю Керман на поверхность Кербина
<B787_300> Почему вы печатаете на русском? egg|laptop|egg
<egg|laptop|egg> got a bug report from a principia user whose save has some russian
<B787_300> probably a ROSCOSMOS employee doing mission planning
<egg|laptop|egg> !wpn котеньке
* galois gives котеньке a cardinal
<UmbralRaptop> It's all fun and games until a cat presents a dead ordinal to you.
<_whitenotifier-3d18> [Principia] Success. Build finished. - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3556/
<_whitenotifier-3d18> [Principia] pleroy commented on issue #2134: Random Crashes - https://git.io/fjmXe
UmbralRaptor has joined #kspacademia
UmbralRaptop has quit [Ping timeout: 189 seconds]
<egg|laptop|egg> UmbralRaptor: mofh: is there a sensible way to do simulated annealing on a continuous parameter space
<UmbralRaptor> I… think so? Possibly something with changing step size in some cases?
* UmbralRaptor chirps at mofh
<egg|laptop|egg> I seem to be getting etiher noise noise noise noise or I Can't Believe It's Not Gradient Descent
<egg|laptop|egg> hm, i wonder whether i should use deмcmc instead
<egg|laptop|egg> that's more tedious though
<egg|laptop|egg> mofh:
<_whitenotifier-3d18> [Principia] pleroy edited a comment on issue #2134: Random Crashes - https://git.io/fjmXe
<egg|laptop|egg> mofh: https://twitter.com/bofh453/status/1117542982725644288 what is the conteggst of that,
<kmath> <bofh453> <@cgranade> getting Fortran 90 to output to YAML.... that's a fun challenge.
<mofh> 20:46:08 < egg|laptop|egg> UmbralRaptor: mofh: is there a sensible way to do simulated annealing on a continuous parameter space
<mofh> I mean yes and no. Like there *is* a natural way but I'm pretty sure it just replicates gradient descent in terms of covergence properties and optimization rate.
<mofh> Well, constrained gradient descent, at least.
<mofh> As for the YAML... NWChem output.
<egg|laptop|egg> mofh: should i use deмcmc instead
<egg|laptop|egg> (parameter space size is 5)
<egg|laptop|egg> I should be getting residuals of a few m, getting more like 50 with the best set of magic numbers I've tried throwing at the shitty optimizer
<mofh> honestly I'd prolly use constrained least squares for a parameter space size that smol, lol.
<mofh> deмcmc is likely to work better than SA I *think*
<egg|laptop|egg> hm, the norm i'm using is a weird L-infinity-of-L2
<egg|laptop|egg> (because the residual in position necessarily starts at 0, L2 over the day is not really a quantity i want to work with)
<egg|laptop|egg> i guess i can write yet another deмcmc
<egg|laptop|egg> mofh: ... or i could templatize the eggsisting on,
<egg|laptop|egg> s/on,/one,/
<galois> egg|laptop|egg meant to say: mofh: ... or i could templatize the eggsisting one,
<egg|laptop|egg> mofh: what sort of population size do i want
<egg|laptop|egg> std::thread::hardware_concurrency(), of course,
<egg|laptop|egg> :-p
<mofh> 22:22:09 < egg|laptop|egg> hm, the norm i'm using is a weird L-infinity-of-L2
<mofh> what the hell?
<egg|laptop|egg> mofh: max distance from the CODE orbit, over the day
<egg|laptop|egg> L-infinity is meaningless in position space obviously
<egg|laptop|egg> but L2 over the orbit is really messy to interpret
<egg|laptop|egg> I could take the distance at the end of the day but that feels wrong, I might run into weird resonances that hide stuff
<egg|laptop|egg> !wpn mofh
* galois gives mofh a isomorphic eigenvector with a compiler attachment
<mofh> Huh, SIAE is happening this year at Le Bourget from Jun 17th - 21st.
<mofh> I should figure out some way to sneak in for the non-public bit. Shouldn't be too hard.
<mofh> Also L2 over an orbit feels like it'd be subject to possibly large error at given positions in orbit
<mofh> Like it's kind of meaningless too tbh.
<mofh> Or at least not any better than L1
<egg|laptop|egg> !u 
<galois> No info for U+0001 (I only know about Unicode up to 9.0)
<egg|laptop|egg> mofh: yeah, hence L infinity
<egg|laptop|egg> note that I'm not optimizing the initial conditions of the orbit
<egg|laptop|egg> so the residual mostly increases with time
<egg|laptop|egg> which makes L1 or L2 weird
<mofh> I mean we're only concerned with it over a single orbit, no?
<egg|laptop|egg> two
<egg|laptop|egg> but yes
<egg|laptop|egg> "The article was only written, because Leos Mervart wanted Beutler to learn LaTex. In this respect, the article was a success. E-Mail by Leos Mervart commenting this slide: Remember not the sins of my youth or my transgressions (Psalm 25:7)"
<mofh> LOL
<egg|laptop|egg> !choose implement another deмcmc|sleep
<galois> egg|laptop|egg: Your options: implement another deмcmc, sleep. My choice: sleep
<egg|laptop|egg> mofh choose implement another deмcmc|sleep
<mofh> implement another deмcmc
<egg|laptop|egg> !choose listen to the bot|listen to mofh
<galois> egg|laptop|egg: Your options: listen to the bot, listen to mofh. My choice: listen to mofh
<egg|laptop|egg> hm.
* mofh cackles
<UmbralRaptor> Time to brew some coffee?
<egg|laptop|egg> mofh: alternatively, soviet republic,