Numerous epidemiologic studies are interested in the effect of exposure to ultraviolet solar radiation on health; such studies require data on dosages of UV radiation in individuals and populations.
There are a variety of instruments which enable such measurements:
- Spectroradiometers and radiometers can provide a measurement of ultraviolet radiation received at ground-level,
- Dosimeters can be worn by individuals and used for the follow-up of their exposure to ultraviolet radiation,
- Satellites can also give an estimation of the ultraviolet dose received at ground-level. It is an indirect measure but allows coverage of very large geographical areas.
The choice of measurement instrument is made according to the length of the UV waves to be measured and the type of epidemiologic study.