Inference of high-latitude ionization and conductivity from AE-C measurements of auroral electron fluxes

Details Inference of high-latitude ionization and conductivity from AE-C measurements of auroral electron fluxes Inference of high-latitude ionization and conductivity from AE-C measurements of auroral electron fluxes

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.7505v&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Aug. 1, 1985, p. 7505-7512.

Physics

36

Auroral Ionization, Ionospheric Conductivity, Ionospheric Electron Density, Polar Regions, Electron Energy, Electron Spectroscopy, Explorer 51 Satellite, Hall Effect, Incoherent Scatter Radar

Scientific paper

Electron fluxes in the kilovolt energy range measured by the AE-C satellite have been used to infer the latitudinal distribution of ionization at high latitudes in the altitude range 90 to 200 km. These distributions are compared with simultaneous measurements of electron density by the Chatanika incoherent scatter radar. The study was based on more than 120 electron density profiles obtained on three different nights at magnetic local times between 0200 and 0400. The calculated distributions agree very well with the altitude and latitude distributions measured by the radar. The only obvious difference was the presence in the radar data of additional ionization produced by solar illumination. A comparison was also conducted of the height-integrated electrical conductivities computed from the measured profiles and those inferred from the satellite measurements. For Hall and Pedersen conductances greater than 5 mhos, the agreement is within 25 percent. The data were also used to deduce the altitude profile of the effective recombination coefficient. This profile agrees well with the results of previous studies.

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