Sunshine recorder

Sunshine recorder

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Credit: PAUL RAPSON/SCIENCE PHOTO LIBRARY

Caption: Campbell-Stokes sunshine recorder. This instrument design has been used worldwide for many years. It is used to record the daily duration of sunshine. Slightly variant designs are used for tropical, subtropical, and temperate latitudes. This is the tropical variant. The sunlight passes through the glass ball, which is mounted at an angle that is adjusted for the latitude. The sunlight passing through the ball is focused onto the recording card and chars a trace along the card. Different shaped cards are used depending on the season (summer, equinoxes, winter). The cards are marked with hour divisions.

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Keywords: burn, campbell-stokes recorder, daily, environment, environmental, equipment, focus, glass ball, light, measurement, meteorological, meteorology, mount, one, single, solar radiation, standard, standardised, sun, sunlight, sunshine recorder, technological, technology, trace, tropical, weather

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