EUV Reference Spectrum 74113 1978


Author: J. E. Hinteregger
Air Force Geophysics Laboratory
Hanscom Air Force Base
Bedford, Massachusetts 01731

Parameter: Solar photon fluxes from 15 to 2000 Å

Brief Description:
This data set contains Extrem Ultraviolet (EUV) reference spectra and related EUV model parameters based on the measurements and work of H.E. Hinteregger and his colleagues. The model and reference spectra (R74113, F74113, F76REF, SC21REFW) are described by Hinteregger et al. (Geophys. Res. Lett. 8, 1147, 1981). The spectra and model are based on rocket measurements and simultaneously obtained EUV fluxes by the AE-C and AE-E spectrometer. The rocket measurements were used to establish absolute calibration factors for the AE-E instrument. The originally proposed R74113 spectrum (Hinteregger, J. Atmos. Terr. Phys. 38, 701, 1976) is based on AE-C measurements and data from a rocket flight on April 23, 1974. R74113 was revised to become F74113 (Heroux and Hinteregger, J. Geophys. Res. 83, 5305, 1978), following refined evaluation of the rocket and satellite data. F74113 is representative for solar minimum conditions and has been widely used in aeronomical studies. F76REF used in addition AE-E data from July 13-28, 1976 (when solar activity was low and constant). SC21REFW extends F76REF to include a rocket flight on August 14, 1979. The F76REF and SC21REFW files include also the wave-length dependent adjustment factors that are used in Hinteregger's flux model.

Availability: (1) Retrievable from CCMC's anonymous FTP site in directory /ae-euv.

References:
H. E. Hinteregger, Measurement of Solar Flux Intensities Below About 2000 , J. Atmos. Terr. Phys. 38, 701, 1976.

L. Heroux and H. E. Hinteregger, Aeronomical Reference Spectrum for Solar UV Below 2000 , J. Geophys. Res. 83, 5305, 1978.

H. E. Hinteregger, K. Fukui, and B. R. Gilson, Observational, Reference and Model Data on Solar EUV, from Measurements on AE-E, Geophys. Res. Lett. 8, 1147, 1981.

G. Schmidtke, Modeling of the Solar Extreme Ultraviolet Irradiance for Aeronomic Applications, Encyclopedia of Physics XLIX/7, K. Rawer (ed.), Springer-Verlag, Berlin, 1984.

C. A. Barth, W. K. Tobiska, G. J. Rottman, and O. R. White, Comparison of 10.7 cm Radio Flux with SME Solar Lyman Alpha Flux, Geophys. Res. Lett. 17, 571, 1990.


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