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- noun Plural form of
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Ground-based Dobson spectroradiometers have been used since the 1920s, and Brewer spectroradiometers have been introduced more recently to provide both ozone and UV radiation monitoring.
They provide much faster sampling than conventional scanning spectroradiometers, allowing the evaluation of both short - and long-term changes in UV irradiance.
Lantz et al.  and Bais et al.  reported that similarly calibrated spectroradiometers typically differ by less than 5% in the UV-A spectrum, and by 5 to 10% in the UV-B spectrum.
The measuring instruments fall into three categories: spectroradiometers, multi-filter instruments, and broadband instruments.
However, spectroradiometers are costly and require trained personnel for maintenance and operation.
SUSPEN intercomparison of ultraviolet spectroradiometers.