Measurements of solar radiation over and under drifting sea ice have been performed during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) between November 2019 and September 2020. All radiation measurements have been performed with RAMSES spectral radiometers (TriOS, Rastede, Germany). All data are given in full spectral resolution interpolated to 1.0 nm, and integrated over the entire wavelength range (broadband, total: 320 to 950 nm). Two sensors were mounted on a Remotely Operated Vehicle (ROV), one irradiance sensor (cos-collector) for energy budget calculations and one radiance sensor (7° opening angle) to obtain high resolution spatial variability. One additional radiometer was installed on the sea ice for surface reference measurements (solar irradiance). All radiation data sets contain the full spectral resolution values interpolated to 1.0 nm, the integrated fluxes over the photosynthetically active radiation (PAR, 400-700nm) range and integrated over the entire wavelength range (broadband, total: 320 to 950 nm). This is a raw data set, including all recorded spectra without any selection. Along with the radiation measurements, ROV positions were obtained from acoustic LBL (Long Base Line)-positioning and all parameters of vehicle depth, distance to the ice and attitude recorded. All times are given in UTC.