Understanding personal ultraviolet radiation (UVR) exposure is essential for the evaluation of the risks and benefits of sun exposure; however, personal dosimetry could be challenging in large-scale or/and long-term population studies. Alternatively, lifestyle surveys with a combination of fitness tracking device/smartphone data on a body orientated with respect to the sun and real-time three-dimensional environmental UVR could be used instead. The main challenge in using this method is the retrieval of the diffuse irradiance as it requires an expensive tracking system of solar position.
In this study, a hypothesis that UVR measured on a vertical plane in the north direction can be used as a proxy for diffuse radiation in the isotropic model to derive three-dimensional irradiance profile was tested against direct measurements and compared with a conventional solar tracker approach in the UK in June-July 2018. The statistical analysis over 17 days under all weather conditions showed that for 45° and 90° tilted surfaces the proposed approach performed as well as the best of the models based on solar tracker data. Such a system could offer a portable and low-cost alternative to measurements of diffuse radiation by a solar tracker system for three-dimensional UVR.
E Corradi1,3, K A Baczynska2*, M Morelii1, D Giulietti3 and M Khazova2
1 SiHealth, Atlas Building (R27), Fermi Avenue, Harwell Campus, Didcot, OX11 0QX
2 Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Didcot, OX11 0RQ, UK
3 University of Pisa, Department of Physics, Largo Pontecorvo, 3 Pisa, Italy
*Corresponding author: katarzyna.baczynska@PHE.gov.uk