Ångström Compensation Pyrheliometer

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Ångström Compensation Pyrheliometer

An instrument developed by K. Ångström for the measurement of direct solar radiation. The radiation receiver station consists of two identical manganin strips whose temperatures are measured by attached thermocouples. One of the strips is shaded, whereas the other is exposed to sunlight. An electrical heating current is passed through the shaded strip so as to raise its temperature to that of the exposed strip. The electric power required to accomplish this is a measure of the solar radiation. See

actinometer, pyrheliometer. Compare Ångström pyrgeometer.


This article is based on NASA's Dictionary of Technical Terms for Aerospace Use