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Euv97: Improvements to Euv Irradiance Modeling in the Soft X-Rays and FUV

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Abstract

EUV97 is a solar EUV empirical model that incorporates revised soft X-ray fluxes from the SOLRAD-11 satellite (1976–1979) and uses Lα recently recalibrated to the UARS satellite (1991–present) SOLSTICE Lα. The soft X-ray data have been revised from the original flux values using Mewe's spectral fits to the data. The recalibrated AE-E and SME Lα datasets use UARS Lα for absolute flux values to provide two solar cycles of Lα irradiance extending back to 1977. Lα is used by EUV97 as a proxy for chromospheric EUV irradiances. The EUV97 empirical solar model takes its heritage from the EUV91 model based on a multiple linear regression technique that fits soft X-ray and EUV irradiances to 10.7 cm flux for transition region and coronal emissions or to Lα and Hei 10830 Ú EW for chromospheric emissions.

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Authors and Affiliations

  1. Telos/JPL, MS 264-723,4800 Oak Grove Dr., Pasadena, CA, 91109, U.S.A.

    W. Kent Tobiska

  2. CIRES, University of Colorado, Campus Box 216, Boulder, CO, 80309, U.S.A.

    F. G. Eparvier

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  1. W. Kent Tobiska
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  2. F. G. Eparvier
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Tobiska, W.K., Eparvier, F.G. Euv97: Improvements to Euv Irradiance Modeling in the Soft X-Rays and FUV. Solar Physics 177, 147–159 (1998). https://doi.org/10.1023/A:1004931416167

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