Algorithm for sunrise and sunset?

  • Thread starter Thread starter M?ht?n
  • Start date Start date
M

M?ht?n

Hello all,

I'm sorry if this question is out of place here, but I have no idea
where to look.

I'm looking for a way to calculate the time of sunrise and sunset
given a UTC date & time and a set of coordinates.

I don't care about a specific programming language, as long as I can
figure out the formulae behind the thing.

Thanks in advance,
 
Its complex though. Hope it helps

http://www.adeptscience.co.uk/products/mathsim/mathcad/add-ons/free_ebooks/astro_form_samp.htm

Regards - OHM

M?ht?n said:
Hello all,

I'm sorry if this question is out of place here, but I have no idea
where to look.

I'm looking for a way to calculate the time of sunrise and sunset
given a UTC date & time and a set of coordinates.

I don't care about a specific programming language, as long as I can
figure out the formulae behind the thing.

Thanks in advance,
Click to expand...

Regards - OHM# OneHandedMan{at}BTInternet{dot}com
 
"Practical Astronomy with your Calculator" by Duffett-Smith is probably the
book you're looking for. It's the simplest approach of many books on the
subject (which is called "spherical astronomy" or "practical astronomy").
 
Hello all,

I'm sorry if this question is out of place here, but I have no idea
where to look.

I'm looking for a way to calculate the time of sunrise and sunset
given a UTC date & time and a set of coordinates.

I don't care about a specific programming language, as long as I can
figure out the formulae behind the thing.

Thanks in advance,
Click to expand...

At one point, there was such a file by s.a.a. contributor Paul Schlyter
in Bob Stout's C SNIPPETS (www.snippets.org), but I can't seem to
locate it anymore. If you can't locate it any other way, email me and I
send a copy I have to you, from an older version of SNIPPETS. It's
about 500 lines, or I'd just post it here.
 
Len Philpot said:
At one point, there was such a file by s.a.a. contributor Paul Schlyter
in Bob Stout's C SNIPPETS (www.snippets.org), but I can't seem to
locate it anymore. If you can't locate it any other way, email me and I
send a copy I have to you, from an older version of SNIPPETS. It's
about 500 lines, or I'd just post it here.
Click to expand...

Sky & Telescope published a BASIC language program for computing
times of sunrise and sunset. I believe that it was called
SUNUP.BAS, and should be available for download from the S&T
site:

http://skyandtelescope.com/resources/software/article_326_1.asp

The program was from August 1994.
 
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