The EC’s Step UV-B Program

摘要: Spectral measurements of solar UV-B radiation are made at an increasing number sites in Europe with a range different instruments and various levels supporting data. Standard lamps predominantly used for calibration, but originate from several National Standards laboratories facilities their use vary site to site. Since 1990, scientists countries have been working together standardize the performance UV spectroradiometers as part European Community’s STEP (Science Technology Environmental Protection) Program. The work has involved two intercomparisons spectroradiometers. Instrument was tested both laboratory during calibration procedures outdoors measurement radiation. Results shown that it is possible achieve consistent agreement between some situations if instrument characteristics well known there rigorous attention detail all stages operation. To maintain consistency sites, traveling lamp unit designed provide periodic confirmation relative stability (not absolute calibration) each spectroradiometer. A prototype currently being tested.