SUSPEN intercomparison of ultraviolet spectroradiometers

摘要: Results from an intercomparison campaign of ultraviolet spectroradiometers that was organized at Nea Michaniona, Greece, July 1–13, 1997, are presented. Nineteen instrument systems 15 different countries took part and provided spectra global solar UV irradiance for two consecutive days sunrise to sunset every half hour. No data exchange allowed between participants in order achieve absolutely independent results among the instruments. The analysis procedure included determination wavelength shifts application suitable corrections measured spectra, their standardization common spectral resolution 1 nm full width maximum cosine corrections. Reference were calculated each observational time, derived a set instruments which objectively selected used as comparison norms assessment relative agreement various With regard absolute measurements, range deviations reference all within ±20%. About agreed ±5%, while only three fell outside ±10% limit. As accuracy registration recorded most (14) smaller than 0.2 nm. overall outcome very encouraging, it proven majority good comparable commonly accepted uncertainties measurements. In addition, many consistent least previous campaigns, held 1995 Ispra, Italy, 1993 Garmisch-Partenkirchen, Germany. result this series several currently operating may be regarded core group instruments, with employment proper operational procedures capable providing quality