A comparison of human- and headform-based measurements of solar ultraviolet B dose

New data on the distribution of solar ultraviolet B (UVB) radiation on the face are presented. Measurements made on human subjects and on rotating headform models are compared, and the effect of altering: the orientation of the headform is considered. For a range of postures (standing, sitting, bending, kneeling) a corresponding headform angle (20 degrees, 30 degrees, 40 degrees, 60 degrees respectively) is determined that gives improved agreement with human-based measurements. This suggests that a more realistic simulation of human exposure is achieved by appropriately tilting the model.