[9fans] Four numbers in /lib/sky/here

[9fans] Four numbers in /lib/sky/here

[Anthony Sorace]

I went to update my /lib/sky/here after a server move and realized it has four numbers in it. I know I added it at some point, but I can’t remember what that fourth number is doing in there. The pre-move version:

:; cat /lib/sky/here
41.499 81.558 250 290

Anyone have any idea what might use that?



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Re: [9fans] Four numbers in /lib/sky/here

[David du Colombier]

> I went to update my /lib/sky/here after a server move and realized it 
> has four numbers in it. I know I added it at some point, but I can’t 
> remember what that fourth number is doing in there. The pre-move 
> version:
> 
> :; cat /lib/sky/here
> 41.499 81.558 250 290
> 
> Anyone have any idea what might use that?

This file is used by astro(1). The values are latitude, longitude and elevation.

-- 
David du Colombier

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Re: [9fans] Four numbers in /lib/sky/here

[David du Colombier]

The fourth number looks like a mistake.
astro(1) only parses the first three numbers.

-- 
David du Colombier

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Re: [9fans] Four numbers in /lib/sky/here

[Anthony Sorace]

There are a few other things which also use that file (e.g. latcmp, the 2e road(1), gmap (who did that?) my darksky program). I’m wondering if I’m missing something that uses that fourth number. I certainly can’t rule out user error. 

> On Jul 27, 2021, at 10:20, David du Colombier <0intro@gmail.com> wrote:
> 
> The fourth number looks like a mistake.
> astro(1) only parses the first three numbers.
> 
> --
> David du Colombier

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Re: [9fans] Four numbers in /lib/sky/here

[Dan Cross]

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On Tue, Jul 27, 2021 at 1:53 PM Anthony Sorace <a@9srv.net> wrote:

> There are a few other things which also use that file (e.g. latcmp, the 2e
> road(1), gmap (who did that?) my darksky program). I’m wondering if I’m
> missing something that uses that fourth number. I certainly can’t rule out
> user error.


Could it be an azimuth that's consumed by something?

        - Dan C.

> On Jul 27, 2021, at 10:20, David du Colombier <0intro@gmail.com> wrote:
> >
> > The fourth number looks like a mistake.
> > astro(1) only parses the first three numbers.
> >
> > --
> > David du Colombier

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Re: [9fans] Four numbers in /lib/sky/here

[Steve Simon]

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hi,

i suspect rob or ken would be the ones to ask, maybe something to do with some private flight planning or astronomy tool?

-Steve


On 27 Jul 2021, at 7:13 pm, Dan Cross <crossd@gmail.com> wrote:


On Tue, Jul 27, 2021 at 1:53 PM Anthony Sorace <a@9srv.net> wrote:
> There are a few other things which also use that file (e.g. latcmp, the 2e road(1), gmap (who did that?) my darksky program). I’m wondering if I’m missing something that uses that fourth number. I certainly can’t rule out user error.

Could it be an azimuth that's consumed by something?

        - Dan C.

> > On Jul 27, 2021, at 10:20, David du Colombier <0intro@gmail.com> wrote:
> > 
> > The fourth number looks like a mistake.
> > astro(1) only parses the first three numbers.
> > 
> > --
> > David du Colombier

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Re: [9fans] Four numbers in /lib/sky/here

[David du Colombier]

The /lib/sky/here file hasn't been changed since the
First Edition and there are only three numbers.

https://github.com/plan9foundation/plan9/commits/main/lib/sky/here

-- 
David du Colombier

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