Solar ultraviolet spectral-irradiance observations from the SUSIM-UARS experiment.

Details Solar ultraviolet spectral-irradiance observations from the SUSIM-UARS experiment. Solar ultraviolet spectral-irradiance observations from the SUSIM-UARS experiment.

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996metro..32..661b&link_type=abstract

Metrologia, Vol. 32, No. 6, p. 661 - 665

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Solar Uv Radiation: Space Instrumentation

Scientific paper

The Solar Ultraviolet Spectral Irradiance Monitor (SUSIM) instrument on board the Upper Atmosphere Research Satellite (UARS) has measured solar ultraviolet spectral-irradiance values since October 1991. The calibration and tracking methods are described. The intensity values have a precision of 1% at wavelengths longer than 200 nm. Short-term ultraviolet (UV) variability is correlated with other chromospheric indices at wavelengths shorter than 280 nm. At longer wavelengths, this correlation changes gradually into an anticorrelation. There exists a long-term solar-cycle component at all wavelengths, which seems to be independent of the rotational modulation. The variability in the integrated UV from 110 nm to 300 nm amounts to 33% of the variability in the total solar irradiance.

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