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Date:      Thu, 9 Oct 2008 16:18:40 -0700
From:      "Peter Wemm" <peter@wemm.org>
To:        "Andrew D" <andrewd@webzone.net.au>
Cc:        FreeBSD Stable <freebsd-stable@freebsd.org>, Ian Smith <smithi@nimnet.asn.au>
Subject:   Re: sidetrack [was Re: 'at now' not working as expected]
Message-ID:  <e7db6d980810091618j12731413ladd7e656e07eb17c@mail.gmail.com>
In-Reply-To: <48EDE8DC.8030108@webzone.net.au>
References:  <884679.22561.qm@web110112.mail.gq1.yahoo.com> <48E75BB7.2060206@madpilot.net> <e7db6d980810081817g6673b593pf9bb7e940562a340@mail.gmail.com> <20081009145337.P16723@sola.nimnet.asn.au> <48EDE8DC.8030108@webzone.net.au>

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On Thu, Oct 9, 2008 at 4:19 AM, Andrew D <andrewd@webzone.net.au> wrote:
> Hi Ian,
>
> Ian Smith wrote:
>>
>> On Wed, 8 Oct 2008, Peter Wemm wrote:
>> [..]
>>  > My tolerance for hacking at(1) code was exceeded when I added hacks
>>  > for 'at sunrise' and 'at sunset' support to a local version.  It
>>  > wasn't pretty, especially when handling things like '30 minutes before
>>  > sunrise' etc.  (I use this for home automation stuff)
>>
>> Peter, just curious .. from where do you pull the current sunrise/sunset
>> info for your location, and in what form?
>>
>
> In Australia, you get it from Geoscience Australia.
>
> http://www.ga.gov.au/geodesy/astro/sunrise.jsp
>
> Just need a few curl queries and then extract the required info from the
> html source :)

I just calculate it from my lat/lon.  Its not particularly hard.  I
found a bunch of massively over-complicated code examples (mostly in
javascript, or worse) that usually was GPL'ed.  I ended up finding the
original public domain code that was written in basic and did a simple
conversion of that.

-- 
Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com; KI6FJV
"All of this is for nothing if we don't go to the stars" - JMS/B5
"If Java had true garbage collection, most programs would delete
themselves upon execution." -- Robert Sewell



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