Pioneer Venus suprathermal electron flux measurements in the Venus umbra

Details Pioneer Venus suprathermal electron flux measurements in the Venus umbra Pioneer Venus suprathermal electron flux measurements in the Venus umbra

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.2695k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, March 1, 1985, p. 2695-2702. Research supported by the Lockheed Indep

Physics

28

Electron Flux Density, Ionospheric Electron Density, Pioneer Venus Spacecraft, Umbras, Venus Atmosphere, Hot Electrons, Maxwell-Boltzmann Density Function, Venus, Pioneer Venus, Electrons, Flux, Umbra, Statistical Analysis, Density, Temperature, Retarding Potential Analyzer, Altitude, Thermal Properties, Comparisons, Energy, Nightside, Ionosphere

Scientific paper

Statistical properties of the two Maxwellian electron densities and temperatures characterizing the differential suprathermal electron fluxes measured by the Pioneer-Venus Lockheed-IPW retarding potential analyzer in the Venus umbra between approximately 1000 and 2000 km altitude and nightward of the 130 deg solar zenith angle are reported. It is found that the median density n2 and temperature T2 of the principal Maxwellian component are 3/cu cm and 14 eV, respectively, and do not exhibit an altitude or solar zenith angle dependence within the umbra region studied. Two thirds of the measured values of n2 and T2 typically fall within plus or minus a factor of two of the median values. The second suprathermal component density n3 is less well defined but has a median density of 0.06/cu cm and similarly exhibits no clear altitude or solar zenith angle dependence.

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