Measurements of downward shortwave (SW) and longwave (LW) irradiance are collected by Kipp&Zonen CMP21 pyranometer and CGR4 pyrgeometer, respectively, installed on the roof of building 1971. Both sensors are ventilated to prevent ice formation on their domes. Data are recorded at 1 minute time step. Corrections are applied to measurements in order to take into account the dependance of the radiometers’ sensitivity on temperature and the change in time. The small pyranometer's thermal offset is...