Physics
Scientific paper
Nov 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976georl...3..693f&link_type=abstract
Geophysical Research Letters, vol. 3, Nov. 1976, p. 693-696.
Physics
1
Earth Ionosphere, Exosphere, Far Ultraviolet Radiation, Lunar Atmosphere, Solar Radiation, Solar Wind, Data Acquisition, Neon, Neutral Particles, Proton Flux Density, Rare Gases, Solar Protons, Sputtering
Scientific paper
The ALSEP/SIDE detectors routinely monitor the dayside lunar ionosphere. Variations in the ionosphere are found to correlate with both the 2800 MHz radio index which can be related to solar EUV and with the solar wind proton flux. For the solar wind, the ionospheric variation is proportionately greater than that of the solar wind. This suggests an amplification effect on the lunar atmosphere due perhaps to sputtering of the surface or, less probably, an inordinate enhancement of noble gases in the solar wind. The surface neutral number density is calculated under the assumption of neon gas. During a quiet solar wind this number agrees with or is slightly above that expected for neon accreted from the solar wind. During an enhanced solar wind the neutral number density is much higher.
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