NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Andrés Ruiz
Date: 2009 Jun 18, 12:15 +0200
Yes, it is easier:
0 < t < 24 h
Where:
t [hours]
GHA0 = GHA at 00:00 UT of the current day
GHA1 = GHA at 00:00 UT of the current day+1
-----Mensaje original-----
De: NavList@fer3.com [mailto:NavList@fer3.com] En nombre de Bill
Enviado el: jueves, 18 de junio de 2009 11:32
Para: NavList@fer3.com
Asunto: [NavList 8686] Re: Basics of computing sunrise/sunset
...
Combine the computed LHA with the longitude in the usual manner, and
you
have your Greenwich Hour Angle (GHA).
Take the computed GHA and find the value just below it on the daily
page for
your date. Subtract that tabular hour's GHA value from your
computed GHA
and convert the difference from arc to time. That time conversion
plus the
UT/GMT for the hour used is the UT of your sunset or sunrise.
The above allows you to escape messy Equation of Time adjustments and
interpolations for your local time.
....
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