Subj : Astro::Sunrise version 0.04
To   : All
From : mothra
Date : Mon Mar 12 2001 05:03 am

From: mothra <mothra@nowhereatall.com>

I have just released a new version of this module to CPAN Here is the readme.

NAME
    Astro::Sunrise - Perl extension for computing the sunrise/sunset on
a given day

SYNOPSIS
      use Astro::Sunrise;

      ($sunrise, $sunset) = sunrise(YYYY,MM,DD,longitude,latitude,Time
Zone,DST);

DESCRIPTION

   This module will return the sunrise/sunset for a given day.

   Eastern longitude is entered as a positive number
   Western longitude is entered as a negative number
   Northern latitude is entered as a positive number
   Southern latitude is entered as a negative number
       There are a number of altitides to chose from, I have chosen
       -0.833 because this is what most countries use. Feel free to
       change it if you need to. Here is the list:
       h = 0 degrees: Center of Sun's disk touches a mathematical
horizon
       h = -0.25 degrees: Sun's upper limb touches a mathematical
horizon
       h = -0.583 degrees: Center of Sun's disk touches the horizon;
atmospheric refraction accounted for
       h = -0.833 degrees: Sun's supper limb touches the horizon;
atmospheric refraction accounted for
       h = -6 degrees: Civil twilight (one can no longer read outside
without artificial illumination)
       h = -12 degrees: Nautical twilight (navigation using a sea
horizon no longer possible)
       h = -15 degrees: Amateur astronomical twilight (the sky is dark
enough for most astronomical observations)
       h = -18 degrees: Astronomical twilight (the sky is completely
dark)

  sunrise

        ($sunrise, $sunset) = sunrise(YYYY,MM,DD,longitude,latitude,Time
Zone,DST);
        ($sunrise, $sunset) = sunrise( 2001, 3, 10, 17.384, 98.625, -5,
0 );

    Returns the sunrise and sunset times, in HH:MM format. (Note: Time
Zone is the offset from GMT and DST is daylight
    savings time, 1 means DST is in effect and 0 is not.

AUTHOR
    Ron Hill rkhill@pacbell.net

    Many thanks also go to Paul Schlyer, Stockholm, Sweden for his
excellent web page on the subject.

CREDITS
    Thanks very much to:

    Rich Bowen (rbowen@rbowen.com)
    for suggestions

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