The Mg 280-nm doublet as a monitor of changes in solar ultraviolet irradiance

Details The Mg 280-nm doublet as a monitor of changes in solar ultraviolet irradiance The Mg 280-nm doublet as a monitor of changes in solar ultraviolet irradiance

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.8672h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, July 20, 1986, p. 8672-8682.

Computer Science

Performance

164

Irradiance, Magnesium, Solar Spectra, Ultraviolet Spectra, Nimbus 7 Satellite, Scale (Ratio), Solar Atmosphere, Solar Backscatter Uv Spectrometer, Solar Terrestrial Interactions, Variations

Scientific paper

Solar irradiance data gathered with the Nimbus 7 spacecraft from 1978-1985 are compared with atmospheric MG 289-nm doublet emission line data to evaluate the possibility of using the rotational line data to calculate the total solar UV input. The satellite instrumentation is described, including the calibration equipment and procedures. The spacecraft records solar irradiance once per day and the remainder of the time records irradiance scattered by the atmosphere. The measured irradiances are converted to equivalent brightness temperatures, which can be interpolated for specific layers of the atmosphere. Sample daily data are provided to illustrate the correlation between variations in the Mg-II core radiation and the soalr UV irradiance. Techniques are defined for correcting for periodic variations in instrument performance to quantify long-term solar UV radiance variations. Using the atmospheric Mg-II doublet radiation for measuring soalr UV irradiance is concluded of value for characterizing the effects of solar radiation on the atmosphere.

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