Coordinated measurements made by Sondrestrom radar and Polar Bear Ultraviolet Imager

Physics

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Auroras, Incoherent Scatter Radar, Ionospheric Electron Density, Radar Measurement, Ultraviolet Photography, Electron Density (Concentration), Electron Precipitation, Nitrogen, Oxygen, Oxygen Atoms, Remote Sensing

Scientific paper

Results of coordinated experiments in which the Sondrestrom incoherent scatter radar measured the ionospheric electron density during overpasses of the Polar Bear satellite are presented. The properties of the incident electron distribution during three midnight sector auroral events over Sondre Stromfjord are determined. The incident electron flux is used to calculate the expected height profile of electron density which is compared with the simultaneous and coincident radar measurements. The results show that the derived profiles agree well with the measured profiles both in the peak electron density and the altitude of the peak. Differences between the measured and derived profiles below the peak are attributed to deviations between the actual spectral shape and the Maxwellian shape assumed in the modeling.

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