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Irradiance Observations from the UARS/SUSIM and ATLAS/SUSIM Experiments

Published online by Cambridge University Press:  12 April 2016

Guenter Brueckner ,
Linton E. Floyd ,
Paul A. Lund ,
Dianne K. Prinz  and
Michael E. Vanhoosier
Guenter Brueckner
Affiliation:
E. O. Hulburt Center for Space Research, Naval Research Laboratory, Washington, DC 20375, USA
Linton E. Floyd
Affiliation:
Interferometrics Corporation, Vienna, VA 22180, USA
Paul A. Lund
Affiliation:
Computation Physics Inc., Fairfax, VA 22031, USA
Dianne K. Prinz
Affiliation:
E. O. Hulburt Center for Space Research, Naval Research Laboratory, Washington, DC 20375, USA
Michael E. Vanhoosier
Affiliation:
E. O. Hulburt Center for Space Research, Naval Research Laboratory, Washington, DC 20375, USA

Extract

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The SUSIM (Solar Ultraviolet Spectral Irradiance Monitor) on board the UARS (Upper Atmosphere Research Satellite) has measured the solar UV output from 120 nm to 400 nm on a daily basis since October 1991. A reference channel records a solar spectrum semi-annually only to reduce the instrument degradation of this channel and to provide long-term stability marks. Four deuterium lamps are used at monthly, semi-annual and annual intervals to provide long term calibration of the instrument. A preliminary analysis of the long term stability of SUSIM-UARS indicates that the precision of the instrument should be better than a few percent. The repeatability of two scans is better than 0.2%. A simplified SUSIM instrument is flying on NASA’s ATLAS Spacelab missions anually to provide calibration points for the SUSIM-UARS.

Type
Observational Programs for Solar and Stellar Irradiance Variability
Information
International Astronomical Union Colloquium , Volume 143: The Sun as a Variable Star: Solar and Stellar Irradiance Variations , 1994 , pp. 72
Copyright
Copyright © Kluwer 1994