Production of dayside ionosphere of Mars

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Ion Production Rates, Ionospheric Electron Density, Mars Atmosphere, Planetary Ionospheres, Atmospheric Ionization, Atmospheric Models, Charge Transfer, Daytime, Photoionization, Recombination Reactions, Viking Lander Spacecraft

Scientific paper

Choosing an appropriate neutral-density model of Martian atmosphere, the photoionization processes have been studied. Using relevant charge transfer and recombination reactions, the equilibrium electron-ion production rates have been computed for all species. The resultant electron-density profiles are compared with the ones measured experimentally by Viking 1 and 2. The theoretical electron-density profile compares well with the measured profiles at low altitudes, but shows rather large values at higher altitudes. The observed oscillation in the electron-density profile at high altitudes is attributed to the variable nature of impact ionization produced by suprathermal charged particles of solar wind origin.

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