Solar hydrogen Lyman-α variation during solar cycles 21 and 22

Details Solar hydrogen Lyman-α variation during solar cycles 21 and 22 Solar hydrogen Lyman-α variation during solar cycles 21 and 22

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.1123k&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 9, p. 1123-1126

Astronomy and Astrophysics

Astrophysics

21

Solar Physics, Astrophysics, And Astronomy: Ultraviolet Emissions, Ionosphere: Solar Radiation And Cosmic Ray Effects

Scientific paper

A full-disk, line-integrated solar Lyman-α dataset is presented that spans two solar cycles. The dataset is created partially from AE-E and SME data that is scaled to the Pioneer Venus Orbiter Ultraviolet Spectrometer (PVOUVS) upwind Lyman-α sky background data which is converted to a solar surrogate. PVOUVS measurements overlap AE-E, SME, and UARS observing periods and are calibrated to UARS/SOLSTICE irradiance units at 1 AU. The scaled AE-E/SME, the SOLSTICE, and the PVOUVS surrogate data in the interim between the satellites collectively form a composite dataset with a quiet sun value of 3.0+/-0.1×1011 photons cm-2s-1 common for three solar minima and a solar maximum value of 6.75+/-0.25×1011 photons cm-2s-1 common to cycles 21 and 22.

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