Richard, please tell us what fraction of the sky is included in the measurement of UVI. In other words, does the instrument have a range of shutters which only allow a narrow focus of sunlight to reach the plate or cells which measure intensity at varying elevation? Or does The instrument measure
Ultraviolet light coming from a relatively wide angle surrounding the sun?
Richard, please tell us what fraction of the sky is included in the measurement of UVI. In other words, does the instrument have a range of shutters which only allow a narrow focus of sunlight to reach the plate or cells which measure intensity at varying elevation? Or does The instrument measure
Ultraviolet light coming from a relatively wide angle surrounding the sun?
I often get asked about this. Thank you for sharing the science :)