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en:hydro:solar-declination [2016/07/09 21:09] – external edit 127.0.0.1en:hydro:solar-declination [2024/04/10 10:02] (current) – external edit 127.0.0.1
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 $$ \delta = 0.4093 * sin \left ( \frac {2*\pi }{365}*J-1.405 \right ) $$ $$ \delta = 0.4093 * sin \left ( \frac {2*\pi }{365}*J-1.405 \right ) $$
  
-where $J$ is the Julian day number. The solar declination is needed to calculate the [[en:hydrology:sunset-hour-angle|sunset hour angle]]. The sunset hour angle is needed for the calculation of [[en:hydrology:daylight-hours|possible daylight hours]].+where $J$ is the Julian day number. The solar declination is needed to calculate the [[en:hydro:sunset-hour-angle|sunset hour angle]]. The sunset hour angle is needed for the calculation of [[en:hydro:daylight-hours|possible daylight hours]].
  
 The solar declination can be calculated with the following Python code. The solar declination can be calculated with the following Python code.
/usr/www/users/uhydro/doku/data/attic/en/hydro/solar-declination.1468091352.txt.gz · Last modified: 2024/04/10 10:15 (external edit)