EUV flux variations during solar cycle 21 from AE-E He/+/ abundances

Details EUV flux variations during solar cycle 21 from AE-E He/+/ abundances EUV flux variations during solar cycle 21 from AE-E He/+/ abundances

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86..825o&link_type=abstract

Journal of Geophysical Research, vol. 86, Feb. 1, 1981, p. 825-828.

Physics

11

Explorer 55 Satellite, Extreme Ultraviolet Radiation, Solar Cycles, Solar Flux, Abundance, Diurnal Variations, Helium Ions, Thermosphere

Scientific paper

The ionization rate of helium in the thermosphere is inferred from AE-E ion and neutral particle composition measurements, made on several days during solar cycle 21, in the context of a steady state photochemical model for helium ions. The inferred ionization rate varies by a factor of 4 between July 1976 and January 1979, a value consistent with the variation in the flux measured during the same period by the EUV spectrometer on board the AE-E satellite.

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