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Astropy general

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General discussion about astropy; please, make use of threads whenever possible in this channel.27 Servers

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10 Nov 2021
@slack_astropy_U86349G3C:openastronomy.orgtepickering
In reply to@slack_astropy_U7NCAGGJV:openastronomy.org
Matt Craig you're right; it was astroscrappy that required the build
given that my thread that's linked to above is over 11 months old, i'm a little disappointed at the slowish progress of native support. as i understand it, the lack of M1 CI resources for testing/builds has been a big holdup. the speed and battery life are game-changing, though, and rosetta is there in case you need something to "just work".
18:40:00
@cadair:cadair.comCadair
In reply to @slack_astropy_U86349G3C:openastronomy.org
given that my thread that's linked to above is over 11 months old, i'm a little disappointed at the slowish progress of native support. as i understand it, the lack of M1 CI resources for testing/builds has been a big holdup. the speed and battery life are game-changing, though, and rosetta is there in case you need something to "just work".
Yeah, we can't even test astropy on M1, we can cross-compile but no idea if the builds work. So there's a long way to go for the tools to catch up.
19:06:58
@slack_astropy_U07529085:openastronomy.orgastrofrog
In reply to@cadair:cadair.com
Yeah, we can't even test astropy on M1, we can cross-compile but no idea if the builds work. So there's a long way to go for the tools to catch up.
I did at least check the wheels locally and all tests pass :)
20:43:20
@cadair:cadair.comCadair
In reply to @slack_astropy_U07529085:openastronomy.org
I did at least check the wheels locally and all tests pass :)
sounds sustainable 😉
20:43:55
@slack_astropy_U07529085:openastronomy.orgastrofrog
In reply to@cadair:cadair.com
sounds sustainable 😉
I wonder how easy it is to use self-hosted GitHub actions runners and Azure pipeline agents - until CI services offer M1 macs by default, we could always rent an M1 mac mini in the cloud and use that to provide us with proper testing
22:35:24
@slack_astropy_U07529085:openastronomy.orgastrofrog
In reply to@slack_astropy_U07529085:openastronomy.org
I wonder how easy it is to use self-hosted GitHub actions runners and Azure pipeline agents - until CI services offer M1 macs by default, we could always rent an M1 mac mini in the cloud and use that to provide us with proper testing
(it would be a temporary cost)
22:35:39
@slack_astropy_U07529085:openastronomy.orgastrofrog
In reply to@slack_astropy_U07529085:openastronomy.org
(it would be a temporary cost)
or we could just wait 😆
22:39:16
@cadair:cadair.comCadair
In reply to @slack_astropy_U07529085:openastronomy.org
or we could just wait 😆
Yeah. Maybe just wait lol
23:21:42
11 Nov 2021
@slack_astropy_U765AJ17E:openastronomy.orghamogu
In reply to@slack_astropy_U07529085:openastronomy.org
or we could just wait 😆
I'm not worried about the cost (money) but about the cost to set it up (time)
01:28:10
@cadair:cadair.comCadair
In reply to @slack_astropy_U765AJ17E:openastronomy.org
I'm not worried about the cost (money) but about the cost to set it up (time)
setup, maintain, deal with the fact that a self-hosted runner doesn't give you a perfectly clean env every time without more work (I think) etc
09:59:47
@slack_astropy_UFSE52VT3:openastronomy.orgprajwel
In reply to@slack_astropy_U067V68UQ:openastronomy.org
Well I did and it didn't seem to make much difference so I think that clears you to be at least a bit critical
Like GSoC, can some of the internship programs run by institutes be converted to open source software contributions in astronomy? Many students in astronomy struggle with git and GitHub/Lab based workflows, maybe such programs will help.
10:18:18
@slack_astropy_UFSE52VT3:openastronomy.orgprajwel changed their profile picture.10:46:55
12 Nov 2021
@cadair:cadair.comCadair
In reply to @slack_astropy_UFSE52VT3:openastronomy.org
Like GSoC, can some of the internship programs run by institutes be converted to open source software contributions in astronomy? Many students in astronomy struggle with git and GitHub/Lab based workflows, maybe such programs will help.
Well GSOC is now not limited to students from 2021 just people "new" to open source (details TBD) so some of these people could do GSOC proper.
10:57:20
@slack_astropy_U8EC16YE4:openastronomy.orgjturner
In reply to@cadair:cadair.com
Well GSOC is now not limited to students from 2021 just people "new" to open source (details TBD) so some of these people could do GSOC proper.
"You've done this before, haven't you? No, not me! Haven't I seen you on Github? No, that was him over there! How come you picked up git filter-branch in half a day then? Oh, don't tell; I always wanted to be a ~lumberjack~ GSoC student!"
20:25:03
15 Nov 2021
@slack_astropy_U02M5D26YTG:openastronomy.orgEdward Berman joined the room.13:59:55
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17 Nov 2021
@slack_astropy_U029NDTU70T:openastronomy.orgmuondude I"m completely new to astropy. I've looked over the documentation but can't seem to find answers determine if astropy meets my needs. Here is what I would like to be able to do: Create a satellite put it into a particular orbit by specifying the orbit elements (willing to accept different element sets). Ability to propagate the orbit to compute satellite ephemeris, and compute visibility of the satellite by specific ground sites. Can I do this with astropy? 22:46:38
@slack_astropy_U029NDTU70T:openastronomy.orgmuondude (edited) ... to do: => ... to do: Create a satellite put it into a particular orbit by specifying the orbit elements (willing to accept different element sets). Ability to propagate the orbit to compute satellite ephemeris, and compute visibility of the satellite by specific ground sites. Can I do this with astropy? 22:49:44
@cadair:cadair.comCadair
In reply to @slack_astropy_U029NDTU70T:openastronomy.org
I"m completely new to astropy. I've looked over the documentation but can't seem to find answers determine if astropy meets my needs. Here is what I would like to be able to do: Create a satellite put it into a particular orbit by specifying the orbit elements (willing to accept different element sets). Ability to propagate the orbit to compute satellite ephemeris, and compute visibility of the satellite by specific ground sites. Can I do this with astropy?
You probably want to look at poliastro which uses astropy to do that kind of thing.
23:00:21
18 Nov 2021
@slack_astropy_U029NDTU70T:openastronomy.orgmuondude
In reply to@cadair:cadair.com
You probably want to look at poliastro which uses astropy to do that kind of thing.
copy that. Thank you.
00:13:54
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@slack_astropy_U75UFQL6P:openastronomy.orgadrn General discussion topic / question (but esp. for Matt Craig and tomaldcroft): xarray (xarray docs) has gotten a lot of adoption as a data structure in geosciences and in some more general Python packages (e.g., arviz). It has a lot of overlap with nddata and some overlap with astropy table, FITS, ASDF. Has anyone thought about adopting or at least interfacing with xarray for complex data structures in astropy? 17:03:34
@slack_astropy_U75UFQL6P:openastronomy.orgadrn (edited) ... for tomaldcroft): `xarray` has ... => ... for xarray docs) has ... 17:04:40
@cadair:cadair.comCadair
In reply to @slack_astropy_U75UFQL6P:openastronomy.org
General discussion topic / question (but esp. for Matt Craig and tomaldcroft): xarray (xarray docs) has gotten a lot of adoption as a data structure in geosciences and in some more general Python packages (e.g., arviz). It has a lot of overlap with nddata and some overlap with astropy table, FITS, ASDF. Has anyone thought about adopting or at least interfacing with xarray for complex data structures in astropy?
I have many thoughts. None I have the time to write down right now.
17:12:18
@cadair:cadair.comCadair
In reply to @cadair:cadair.com
I have many thoughts. None I have the time to write down right now.
Largely they boil down to "but wcs".
17:13:44
@slack_astropy_U0LE97SBD:openastronomy.orgtomaldcroft
In reply to@cadair:cadair.com
Largely they boil down to "but wcs".
I haven't really thought about this from the Table perspective. I haven't had a need for this and thought it was mostly an ndarray-like structure.
17:15:56
@slack_astropy_U86349G3C:openastronomy.orgtepickering
In reply to@slack_astropy_U0LE97SBD:openastronomy.org
I haven't really thought about this from the Table perspective. I haven't had a need for this and thought it was mostly an ndarray-like structure.
what Cadair said. right now it's built around regularized coordinate grids. the "specific needs" section in http://xarray.pydata.org/en/stable/roadmap.html is basically compatibility with units, wcs, fits, and asdf.
20:28:03

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