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| #REDIRECT [[Ångström compensation pyrheliometer]] | | #REDIRECT [[Ångström compensation pyrheliometer]] |
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| == Ångström compensation pyrheliometer ==
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| <div class="definition"><div class="short_definition">An [[absolute instrument]] developed by K. Ångström for the measurement of [[direct solar radiation]].</div><br/> <div class="paragraph">The radiation receiver station consists of two identical manganin strips, the temperatures of which are measured by attached thermocouples. One of the strips is shaded, while the other is exposed to [[sunlight]]. An electrical heating current is passed through the shaded strip to raise its [[temperature]] to that of the exposed strip. The electric [[power]] required to accomplish this is a measure of the solar radiation. <br/>''See'' [[actinometer]], [[pyrheliometer]]; <br/>''compare'' [[Ångström pyrgeometer]].</div><br/> </div>
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