A Jordan sunshine recorder is a type of
sunshine recorder invented in the 19th century by T. B. Jordan with later modifications by his son, J. B. Jordan. The device consists of a cylinder with two small apertures through which sunlight can pass. Two sheets of
photosensitive Photosensitivity is the amount to which an object reacts upon receiving photons, especially visible light. In medicine, the term is principally used for abnormal reactions of the skin, and two types are distinguished, photoallergy and phototoxicity. ...
paper are placed inside the cylinder and the recorder is positioned in such a way that the sunlight falling through the apertures leaves a path on the paper as the sun moves through the sky during the day. The Jordan recorder was criticized as producing less consistent results than the
Campbell–Stokes recorder
The Campbell–Stokes recorder (sometimes called a Stokes sphere) is a type of sunshine recorder. It was invented by John Francis Campbell in 1853 and modified in 1879 by Sir George Gabriel Stokes. The original design by Campbell consisted ...
due to difficulty in precisely interpreting the sun paths recorded.
External links
AMS Glossary of Meteorology: Jordan Sunshine Recorder
References
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Sunshine recorders