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en:hydro:distance-sun-earth

Distance Sun-Earth

The relative distance between sun and earth varies as a function of the Julian day $J$:

$$d_{se} = 1+0.033*cos \left ( \frac {2*\pi}{365} * J \right ) $$

.

The value $d_{se}$ is needed to calculate the extraterrestrial solar radiation.

en/hydro/distance-sun-earth.txt · Last modified: 2016/10/04 00:59 by ckuells

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