It is measured with a sunshine recorder
and data from meteorological stations has Alor Setar Kedah at 6.
To initiate the observatory's research program in the 1880s and '90s, Abbott Lawrence Rotch purchased stalwart devices, including a Campbell-Stokes Sunshine Recorder
We had a sunshine recorder
on the school roof and pupils had to go up there everyday to check it.
It was inspired by a device called the sunshine recorder
, which records the amount of sunlight on a given day by focusing the rays through a glass sphere onto specially treated paper.
One such instrument is the Campbell-Stokes sunshine recorder (Fig.
The daily bright sunshine measurements made by the Campbell-Stokes sunshine recorder since 1965 are available from NCDC; however, the roughly 75 years of daily sunshine data prior to 1965 had never been digitally archived.
Meanwhile a and b are fitted constant coefficients such that b represents the sensitivity of normalized global irradiance to normalized sunshine percentage, while a represents global irradiance under overcast conditions when direct radiation is below the burning threshold of the sunshine recorder (approximately 120 W [m.
2003: Through a glass brightly: Some new light on the Campbell-Stokes sunshine recorder.
Paul Damari, one of the Midlands' top weather experts, checks the sunshine recorder
in his back garden in Worcester.
On a track like Sunshine Recorder
, this band simultaneously visit the old masters while rewriting the blueprint.