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Posted by Andy Hassall on 10/06/06 22:25
On Fri, 06 Oct 2006 21:50:26 GMT, Your Name <email@address.com> wrote:
>I'm trying to use date_sunrise() and date_sunset() functions in my php5
>code.
>
>I use them as follows:
>
>date_default_timezone_set("America/New_York");
>$sr = date_sunrise($i,SUNFUNCS_RET_TIMESTAMP,39.2155,-89.2177);
>$ss = date_sunset($i,SUNFUNCS_RET_TIMESTAMP,39.2155,-89.2177);
>
>The zenith is whatever the php default is set to (90.58...).
>
>The problem I am having is that the resulting times given are about 20
>minutes later than they should be (according to
>http://aa.usno.navy.mil/data/docs/RS_OneDay.html).
>
>What am I doing wrong?
Not sure, I get almost the same figures.
PHP says sunrise/sunset, UTC:
"
Fri, 06 Oct 2006 11:58:16 +0000
Fri, 06 Oct 2006 23:31:19 +0000
"
The site above for the same coordinates says (snipped to the relevant bits):
"
The following information is provided for (longitude W89.2, latitude N39.2):
Friday
6 October 2006 Universal Time
Sunrise 11:58
Sunset 23:32
"
It wouldn't accept fractional minutes for the coordinates which probably
accounts for the few seconds difference.
What numbers are you feeding into the site?
--
Andy Hassall :: andy@andyh.co.uk :: http://www.andyh.co.uk
http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis tool
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