The intensive observation field campaign took place between June 02, 2014 and July 28, 2014 at Lindenberg / Falkenberg with the collaborative effort between Meteorological Observatory Lindenberg (MOL) and Leibniz Institute for Tropospheric Research (TROPOS). The IOP involved the TROPOS pyranometer stations (45 nos.) and a radiation station (similar to BSRN). The main purpose of this initiative was (1) to perform calibration of TROPOS pyranometer stations against MOL-BSRN standards, and (2) to obtain measurements of spatial variability of downward solar irradiance at the surface using our pyranometer network.