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Solar tower
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A solar tower is a structure used to support equipment for studying the sun.
Solar towers are used to raise the observation equipment above the atmospheric disturbances caused by solar heating of the ground and the radiation of the heat into the atmosphere. Traditional observatories do not have to be placed high above ground level as they do most of their observation at night when ground radiation is at a minimum.
The horizontal Snow solar observatory was built on Mount Wilson in 1904. It was soon found that heat radiation was disrupting observations. Almost as soon as the Snow Observatory opened, plans were started for a 60 foot tall tower that opened in 1908 follower by a 150 foot tower in 1912. The 60 foot tower is currently used to study helioseismology while the 150 foot tower is active in UCLA's Solar Cycle Program.
The term has also been used to refer to other structures used for experimental purposes, such as the Solar Tower Atmospheric Cherenkov Effect Experiment which is being used to study Cherenkov radiation, and the Weizmann Institute solar power tower.
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