NRPB solar ultraviolet radiation measurement network

The National Radiological Protection Board (NRPB) has established a solar radiation measurement network in the UK. Each site incorporates a solar radiation measurement system (SRMS) measuring erythemally effective irradiance, WA irradiance and illuminance. Raw data consist of 5-minute mean values. All sites are linked to a screen display at NRPB. Data are loaded onto a computer for calibration. Subsequent processing yields long-term mean or time integrated quantities. SRMS units are re-calibrated annually. Calibration involves use of a scanning spectroradiometer (SSR). The SSR and SRMS units introduce uncertainties into the measurement data. Factors contributing to this uncertainty have been examined.