Definitions for "Global radiation"
combined quantity of direct, diffuse sky, and diffuse reflected solar radiation received on a plane surface from a solid angle of 360°, integrated over all wavelengths (a.k.a. total incident radiation) [W/m2],   globale Sonnenstrahlung
total solar radiation coming from the sun and all of the sky. It includes the direct beam from the unclouded sun and diffuse radiation arriving indirectly as scattered or reflected sunlight from the sky and clouds.
Total solar radiant energy impinging on a surface, equal to the sum of direct and diffuse radiation. See also: Diffuse radiation, Direct radiation
The wavelength distribution of sunlight under a given environment (e.g. under windowpane glass).