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shadows horizontal extraterrestrial irradiation, received on different days of the year in Manchester and Berlin (if there is no atmosphere)


can be calculated using equations that take into account the declination, latitude, hour angle and variation of orbital radius.
The results are:

I

	Málaga Berlin
		daily irradiance daily irradiance variation
Date	OD (W / m 2 d) I	OD (W / m 2 d) Malaga
Berlin 1-1		4401.053824 1730.013617 2671.040207
21-3	8418,149662	6379,757063	2038,392599
21-6	11598,52127	11582,42839	16,092883
21-9	8503,991085	6551,978019	1952,013066
21-12	4332,148229	1667,278762	2664,869467
31-12	4387,807652	1717,688555	2670,119097
10-jul	11451,84334	139.085929 11312.75741
20-Jan		4904.923872 2218.350796 2686.573076

The difference varies irradiation increased between June and December. In June soslticio is closer because the sun's rays affect the outer atmosphere m2 considered almost perpendicular, while in the solstice of December 21, are oblique, and the different paths of the sun on that day in Malaga and Berlin, are remarkable, and is therefore maximum variation between irradiance received by both locations. Keep in mind we refer to radiation incident on the outer layer of the atmosphere. If on the surface of the Earth, I think that will be even more remarkable (speaking only of the direct radiation), because there if involved mitigating cloud cover to cross, and indeed it is not the same, perpendicular to oblique .


Alcad