Calculate sunrise and sunset time

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JEREMIE
JEREMIE 2012-7-18
回答： Meysam Mahooti 2019-9-24
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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回答（3 个）

JEREMIE
JEREMIE 2012-7-18
toolbox suncycle.m seems to do that...
  1 个评论
Star Strider
Star Strider 2012-7-18
After I searched for and found that script, I discovered that Scripps Institute of Oceanography has a large collection of MATLAB files and toolboxes:
http://mooring.ucsd.edu/index.html?main/software.html

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Meysam Mahooti
Meysam Mahooti 2019-9-24
Tobias Piechowiak
Tobias Piechowiak 2015-9-16
编辑：Tobias Piechowiak 2015-9-16
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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