MATLAB Answers

Calculate sunrise and sunset time

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JEREMIE
JEREMIE on 18 Jul 2012
Edited: Tobias Piechowiak on 16 Sep 2015
Hi all,
I wish to know if it's possible to calculate sunrise and sunset time using one date/time and geographical position ? Maybe a toolbox already exists ?
Thanks,

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Answers (3)

JEREMIE
JEREMIE on 18 Jul 2012
toolbox suncycle.m seems to do that...

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Star Strider
Star Strider on 18 Jul 2012
After I searched for and found that script, I discovered that Scripps Institute of Oceanography has a large collection of MATLAB files and toolboxes:

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Tobias Piechowiak
Tobias Piechowiak on 16 Sep 2015
Edited: Tobias Piechowiak on 16 Sep 2015
The connection between hour angle H, latitude phi and declination of sun delta is: cos(H) = -tan(phi)*tan(delta). delta can be approximated by: delta = sin(T)*23.5 where T is time from 21th, March or 23rd, September in days. Gives good enough results +- 20 min when you assume that H is 0 deg at noon.
Greetings

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