High-spectral-resolution solar irradiance in the 184.5 to 232.5 nm range from the SOLSPEC and UVSP spectrometers |
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| Authors: | A Tartag Y Bénilan D Samain G Thuillier P Bruston |
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| Institution: | (1) UMR 7583 du CNRS, Laboratoire Interuniversitaire des Systèmes Atmosphériques, 61, Avenue du Général de Gaulle, F-94010 Créteil cedex, France;(2) Institut d'Astrophysique Spatiale, Université Paris XI, F-91405 Orsay cedex, France;(3) Service d'Aéronomie du CNRS, F-91371 Verrières-le-Buisson, France |
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| Abstract: | The study of the minor constituents of the planetary atmospheres from the analysis of the scattered light properties requires
the knowledge of the absolute incident solar irradiance at high resolution. The data were obtained from the UVSP experiment
on board the Solar Maximum Mission satellite in the 184.5–232.5 nm spectral range. We have reconstituted the solar spectrum
measured in three different regions of the solar disk with a spectral resolution of 0.01 nm and a spatial resolution of 3 arc sec.
The wavelength scale was determined with a standard deviation of 0.0025 nm. The comparison of the relative intensities in
three locations of the solar disk with those obtained by other authors allowed us to determine these positions accurately
and to derive the integrated spectrum of the whole disk. Finally, the resulting spectrum has been expressed in absolute units
using the spectral irradiance by the SOLSPEC and SUSIM spectrometers, respectively operated with the ATLAS 1 mission and from
the Upper Atmosphere Research Satellite. We obtained the absolute solar irradiance with an accuracy of 10% in the 184.5–232.5 nm
spectral range with a spectral resolution of 0.01 nm for the first time using data from space observations.
Supplementary material to this paper is available in electronic form at http://dx.doi.org/10.1023/A:1017976515168 |
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