11
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      The 1996 North American Interagency Intercomparison of Ultraviolet Monitoring Spectroradiometers

      research-article

      Read this article at

      ScienceOpenPublisherPMC
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Concern over stratospheric ozone depletion has prompted several government agencies in North America to establish networks of spectroradiometers for monitoring solar ultraviolet irradiance at the surface of the Earth. To assess the ability of spectroradiometers to accurately measure solar ultraviolet irradiance, and to compare the results between instruments of different monitoring networks, the third North American Interagency Intercomparison of Ultraviolet Monitoring Spectroradiometers was held June 17–25, 1996 at Table Mountain outside Boulder, Colorado, USA. This Intercomparison was coordinated by the National Institute of Standards and Technology (NIST) and the National Oceanic and Atmospheric Administration (NOAA). Participating agencies were the Environmental Protection Agency; the National Science Foundation; the Smithsonian Environmental Research Center; the Department of Agriculture; and the Atmospheric Environment Service, Canada. The spectral irradiances of participants’ calibrated standard lamps were measured at NIST prior to the Intercomparison. The spectral irradiance scales used by the participants agreed with the NIST scale within the combined uncertainties, and for all lamps the spectral irradiance in the horizontal position was lower than that in the vertical position. Instruments were characterized for wavelength uncertainty, bandwidth, stray-light rejection, and spectral irradiance responsivity, the latter with NIST standard lamps operating in specially designed field calibration units. The spectral irradiance responsivity demonstrated instabilities for some instruments. Synchronized spectral scans of the solar irradiance were performed over several days. Using the spectral irradiance responsivities determined with the NIST standard lamps, the measured solar irradiances had some unexplained systematic differences between instruments.

          Related collections

          Most cited references9

          • Record: found
          • Abstract: not found
          • Book: not found

          CRC Handbook of Chemistry and Physics

            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Wavelengths of spectral lines in mercury pencil lamps.

            The wavelengths of 19 spectral lines in the region 253-579 nm emitted by Hg pencil-type lamps were measured by Fourier-transform spectroscopy. Precise calibration of the spectra was obtained with wavelengths of (198)Hg as external standards. Our recommended values should be useful aswavelength-calibration standards for moderate-resolution spectrometers at an uncertainty level of 0.0001 nm.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Irradiances of spectral lines in mercury pencil lamps.

              The irradiancesof 37 spectral lines emitted bymercury pencil-type lamps were measuredby comparison with calibrated continuum sources. The lines span the region 230-590 nm. For the 14 most prominent lines the absolute irradiances should be useful for radiometric calibrations at an uncertainty level of ~15% 195% confidence2. The ratios of the irradiances for this same group of lines are significantly more reproducible; they should be useful at an uncertainty level of ~10%.
                Bookmark

                Author and article information

                Journal
                J Res Natl Inst Stand Technol
                J Res Natl Inst Stand Technol
                JRES
                Journal of Research of the National Institute of Standards and Technology
                [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology
                1044-677X
                2165-7254
                Sep-Oct 1998
                01 October 1998
                : 103
                : 5
                : 449-482
                Affiliations
                National Institute of Standards and Technology, Gaithersburg, MD 20899-0001 USA
                National Oceanic and Atmospheric Administration, R/E/ARx1, 325 Broadway, Boulder, CO 80303 USA
                Atmospheric Environment Service, Environment Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, Canada
                Dept. of Physics and Astronomy, University of Georgia, Athens, GA 30602 USA
                Biospherical Instruments Inc., 5340 Riley Street, San Diego, CA 92110-2621 USA
                Yankee Environmental Systems, Inc., Airport Industrial Park Turner Falls, MA 01376 USA
                USDA UV-B Radiation Monitoring Program, Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO 880523, USA
                Smithsonian Environmental Research Center of the Smithsonian Institution, P.O. Box 28, Edgewater, MD 21037 USA
                Article
                j35ear
                10.6028/jres.103.028
                4889314
                9851eee2-5c4b-4809-ba2e-7bbd28ca2a90
                Copyright @ 1998

                The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.

                History
                : 03 August 1998
                Funding
                Funded by: National Institute of Standards and Technology
                Award ID: 9999-NIST
                Categories
                Article

                environmental monitoring,intercomparison,solar ultraviolet,spectroradiometers

                Comments

                Comment on this article