Radiation refers here to solar- and thermal/infrared radiation respectively and is measured at Sonnblick in these two different broadband wavelengths:
Shortwave Radiation: solar radiation. Solar radiation comes either directly from the sun, or indirectly via scattering in the earth atmosphere. The spectral range of solar radiation extends from 0,1 to 30 μm, with 0,3 to 3,5 μm containing the most of the energy.
(temperature and atmospheric composition dependent emission in the wavelength range of about 3,5-100 μm)
Electromagnetic waves of solar radiation are much shorter and thus have a higher energy than thermal radiation. That is why they are called short- (solar) and long wave (thermal) radiation.
Time specification in UTC!