NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sunrise
From: Gary LaPook
Date: 2013 Sep 25, 14:51 -0700
From: Gary LaPook
Date: 2013 Sep 25, 14:51 -0700
Although there are other, more elegant, ways to compute what you want, a simple and fast way to accomplish this is to go to the USNO website at:
http://aa.usno.navy.mil/data/docs/celnavtable.php
Then put in the date and location and an initial starting time and get the resulting Hc. Then iterate the time until you get the result you are looking for.
gl
From: Şems Aktuğ <saktug@pirireis.edu.tr>
To: garylapook@pacbell.net
Sent: Wednesday, September 25, 2013 2:24 PM
Subject: [NavList] Sunrise
http://aa.usno.navy.mil/data/docs/celnavtable.php
Then put in the date and location and an initial starting time and get the resulting Hc. Then iterate the time until you get the result you are looking for.
gl
From: Şems Aktuğ <saktug@pirireis.edu.tr>
To: garylapook@pacbell.net
Sent: Wednesday, September 25, 2013 2:24 PM
Subject: [NavList] Sunrise
My question is how can I calculate the time for specific Hc, position and day for the Sun? Let’s say at land there is a building and the altitude of the building is five degrees as seen from my position. When the sun will rise over the building?
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