mose.giordanoCongratulations and good work to all students 😀
aquatikoHello everyone!! Rohit here... Hoping to spend a great summer with openAstronomy and GSoC!!
bsipoczfeeding it into the suborg's blog is welcome, but we still a separate stream for the student that is also fed into the OA list,.
astrojuanlualso, the "directions" page of STScI is under construction http://www.stsci.edu/institute/brc/facilities/Directions.html
jorgepiloto Hi OpenAstronomy people! It is Jorge, from the
poliastro package 🚀🌍️
I was wondering if anyone has ever heard about an algorithm called
Improved Gauss method for solving Kepler's problem. I found it on Battin 1999 [pag 234]. It is supposed to be a high performance propagator for near-parabolic orbits but after implementing it seems to not converge for some orbits.
So if anyone has more information it would be tremendously usefull! Best regards 😊
mose.giordanoI find the method in http://dx.doi.org/10.1007/BF00691917 very interesting: it works in the entire elliptical regime and is non-iterative @jorgepiloto:matrix.org
jorgepilotoWow mose.giordano ! That method looks really good. Thank you so much for your time, hope to have the algorithm implemented before poliastro 0.13 version. I am obsessed with finding a
fast-convergence-all-possible-eccentricities-crazy-kepler-solver😆, so that paper will be usefull for sure
jorgepilotoIt states that realtive errors are of the order of 10e-16 and due solely to machine arithmetic roundoff! I'll let you know once the algorithm will be working. Thank you again 🎉
mose.giordanoI wrote a Julia implementation of the "naive" method in https://github.com/JuliaAstro/AstroLib.jl/blob/fb2ef587a2ac68a1c864bf251e8d9c3601ec4719/src/kepler_solver.jl The paper is really straightforward, it's incredibly easy to implement. Probably the "non-naive" method is a little bit less trivial
HarveyPwca on FreenodeGoodbye Aberration: Physicist Solves 2,000-Year-Old Optical Problem https://petapixel.com/2019/07/05/goodbye-aberration-physicist-solves-2000-year-old-optical-problem/
jorgepiloto Hi everyone! Hope you are spending a really good summer if you are in the northern hemisphere.
I am trying to implement the
U.S. Atmosphere 1976 a.k.a
COESA76 and got stucked with the pressure equations for geometric altitudes avobe
Z>86km. If someone knows any software, routine or algorithm where I can check the implementation and compare with the official NASA document it would be so useful 🙂
jorgepilotoOh, and for those in southern hemisphere, happy winter 😁
Chatziargyriou EleftheriaI'm not familiar with it but perhaps this is what you're looking for
FoksI guess this thing I did recently is an open astronomy thing :)
Fokstakes the latest Himawari-8 picture, and makes it into a nice wallpaper, which can then be set automagically from https://f.0x52.eu/earthwallpaper/himawari-8-quote.png or https://f.0x52.eu/earthwallpaper/himawari-8.png
Foks > <@cadair:cadair.com> nice, you seen https://github.com/cameronleger/goes16-background ?
Foksthere's a Himawari-8 one as well I see now...