Algorithm for sunrise and sunset?

[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,

 

[One Handed Man [ OHM# ]]

Its complex though. Hope it helps

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

Regards - OHM

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,

Regards - OHM# OneHandedMan{at}BTInternet{dot}com

 

[Michael A. Covington]

"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").

 

[Jim Hughes]

See http://www.faqs.org/faqs/astronomy/faq/part3/section-5.html

 

[brp]

Astronomical Algorithms by Jean Meeus

 

[SFB]

http://www.freevbcode.com/ShowCode.Asp?ID=341

for clsSunrise by Scott Seligman

 

[Len Philpot]

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,

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.

 

[Greg Neill]

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.

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.

 

[M?ht?n]

...

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.

Brilliant! Thanks a bunch for all those who replied.

I've got enough to go on with for now.

Thank you very much!