Nightside ionosphere of Venus |
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Authors: | V.A. Krasnopolsky |
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Affiliation: | 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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