Solar EUV index for aeronomical studies at earth from Langmuir probe photoelectron measurements on the Pioneer Venus orbiter

Details Solar EUV index for aeronomical studies at earth from Langmuir probe photoelectron measurements on the Pioneer Venus orbiter Solar EUV index for aeronomical studies at earth from Langmuir probe photoelectron measurements on the Pioneer Venus orbiter

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9710525h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A7, July 1, 1992, p. 10,525-10,537. Research supported by Nationa

Physics

10

Aeronomy, Electrostatic Probes, Extreme Ultraviolet Radiation, Photoelectron Spectroscopy, Pioneer Venus 1 Spacecraft, E Region, Lyman Alpha Radiation, Solar Flux, Solar Terrestrial Interactions, Solar Wind, Work Functions

Scientific paper

A solar EUV index for aeronomical studies at earth, obtained from the Langmuir probe measurement of photoelectron current on the Pioneer Venus orbiter, is presented. To examine the potential of E sub EUV as a solar EUV flux index, the behavior of ionospheric parameters f sub 0 E, f sub 0 F1, and f sub 0 F2 are studied at midlatitude stations, and their relationship with E sub EUV and with the 10.7-cm solar radio flux is compared. f sub 0 F1 and f sub 0 F2 are found to be better correlated with E sub EUV than with the 10.7-cm flux. F sub 0 E is better correlated with the 10.7-cm flux, because the 10.7-cm flux is also a proxy for soft X-rays, which are an important ionizing source in the E region. A table is also presented for the EUV index, E sub EUV, for the period February 12, 1979, through most of 1991.

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