Sunshine data is measured by an instrument called a sunshine recorder. It consists of two photoelectric cells, one exposed to sunlight and the other shaded. An electric signal is generated when the ...

Sunshine duration in New Zealand has historically been measured using a Campbell-Stokes sunshine recorder. The contemporary upgrade of climate stations has resulted in the introduction of Kipp & Zonen ...

In the late 19 th century, Julien P. Friez (1850-1916) and his Baltimore based company began mass producing highly technical weather monitoring systems, and provided many technical instruments to the ...

SUNSHINE-RECORDERS may be divided into two classes, viz., those which roughly measure solar energy by the burning of card and wood, and those which, by means of some photographic process, yield a ...