Physics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.6523j&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A5, May 1, 1992, p. 6523-6530.
Physics
1
Electron Energy, Magnetospheric Electron Density, Mars (Planet), Planetary Magnetospheres, Viking Lander 2, Electron Plasma, Plasma Pressure, Solar Planetary Interactions
Scientific paper
An analysis of the electron mode sweeps made in Viking 2 above the ionosphere is presented. An observation of the electron energy spectrum over the range 0 to 78 eV was recorded in 1 s and observations were made at intervals of 4 or 8 s. The concentrations and temperatures were highly variable in the altitude range 14,000 to 9000 km. Evidence for two Maxwellian components were present in most of the records. The general trend of concentration and temperature for the predominant component was from 2/cu cm and 100,000 K at 15,600 km to 5/cu cm at 220,000 K and 900 km, in good agreement with the Mars 3 observations of Gringauz et al. (1974). The higher-temperature component was generally characterized by a temperature near 400,000 K and concentrations near 0.1/cu cm. The electron plasma pressures near 800 km were about a factor of 20 lower than those obtained from Viking 1, the difference being much greater than expected from the normal distribution around the stagnation point in the shocked solar wind.
Hanson William B.
Johnson Francis S.
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