Physics
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.6853s&link_type=abstract
Journal of Geophysical Research, vol. 86, Aug. 1, 1981, p. 6853-6858.
Physics
15
Atmospheric Ionization, Auroral Spectroscopy, Electron Precipitation, Optical Emission Spectroscopy, Spectrophotometry, E Region, Incoherent Scattering, Ionospheric Electron Density, Radar Scattering, Vertical Distribution
Scientific paper
Coordinated incoherent scatter radar and spectrophotometric measurements were made of an intense, early-morning pulsating aurora in order to (1) determine the total energy flux and characteristic energy parameter alpha of the precipitating electrons on a time scale smaller than the pulsation duration and (2) investigate the ionospheric electron density response on the same time scale. The energy flux and alpha values derived from photometric data were used to model the electron density versus altitude of the ionosphere for comparison with the radar measurements. It was found that the measured ionization altitude profiles did not change significantly on the time scale of the pulsations, and that the maximum electron density of the E region was typically 700,000 at an altitude of 99 km. These results suggest that a magnetospheric modulation mechanism is required to explain diffuse pulsating auroras.
Sears Robert D.
Vondrak Richard R.
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