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Comparing the equation above, 57% more than the energy counted for the next case. This amount of energy can be obtained, for example, on the moon surface. Sunlight reaching the Earth's surface passes through a thick layer of atmosphere. When deviating from the middle/daytime, insolation of the sun on the surface is weakened. In the calculation, can consider the length of the day more than 12. Corresponding Figure 2 shows the influence of lost energy at the maximum tracking angle compared with the ideal tracing. It is obvious that in tracking the outer angle of ± 60O there is no considerable energy gain gained
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