Nightside ionosphere of Venus |
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| Authors: | VA Krasnopolsky |
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| Institution: | aSpace Research Institute, Academy of Sciences U.S.S.R., Profsojusnaja 88, 117810 Moscow, U.S.S.R. |
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| Abstract: | Venera 9, 10 measurements of the nightside ionospheric profile and the night airglow were used for investigating ionosphere formation processes. The upper ionospheric layer may be formed by HeI 584 Å radiation; the lower layer by meteorite ionization. Upper limits on the electron energy flux, <4 × 108eV cm?2 s?1, the helium ion flux <107 cm?2 s?1, the nitric oxide mixing ratio, <1.5 × 10?4 and the atomic sulphur mixing ratio, <10?6, are deduced for ionospheric altitudes. |
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