The precise measurement of natural solar radiation is an important requirement for atmospheric research, the measurement of the total ozone column and the determination of UV index. Additionally, renewable energy research and the use of artificial sources such as solar simulators require accurate optical radiation measurement data. Gigahertz-Optik GmbH has been an active partner of the solar community since 1986 as both a manufacturer of measuring instruments and a service provider. Some example applications of natural and artificial solar radiation measurement with Gigahertz-Optik GmbH products are given below.
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Measurement of solar irradiance to calculate the UV index
The global solar UV index , UVI, is an internationally recognised measure primarily intended to inform the public about UV radiation health risks and sun protection. The UVI uses simple integer values, typically 0 to 11+, to describe the level of solar UV radiation at the Earth’s surface. The potential for damage to the skin and eyes increases and the time it takes for harm to occur will decrease as the UV index value increases.
Measurement of the total ozone column from direct solar irradiance
Ground level solar irradiance is dependent on various atmospheric parameters such as cloud cover, total ozone and aerosol content. Most of the atmosphere’s ozone is contained in the stratosphere, providing essential protection from the Sun’s harmful UV radiation. Ground-based spectroradiometer measurements of direct solar UV irradiance can be used to determine the Total Ozone Column, TOC \\\[1\\\]. This requires a spectroradiometer capable of tracking the solar zenith angle and measuring spectral irradiance within a narrow field of view.