Incoherent scatter measurements of ion-neutral collision frequencies and temperatures in the lower thermosphere of the auroral region

Details Incoherent scatter measurements of ion-neutral collision frequencies and temperatures in the lower thermosphere of the auroral region Incoherent scatter measurements of ion-neutral collision frequencies and temperatures in the lower thermosphere of the auroral region

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....8810137l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Dec. 1, 1983, p. 10137-10144. Research supported by the Centre Nation

Other

25

Auroral Zones, Incoherent Scatter Radar, Particle Collisions, Thermosphere, E Region, Ion Temperature, Ionospheric Ion Density, Temperature Profiles

Scientific paper

Incoherent-scatter observations performed in March and November, 1978, at Chatanika have been used for studying the lower thermosphere in the auroral region. Neutral temperatures and densities have been found during periods without Joule heating. Mean profiles of temperatures and collision frequencies (approximately proportional to neutral densities) for each month and profiles obtained during four specific nights are presented. Between 93 and 110 km, the mean profiles of temperature are in good agreement with the Jacchia (1971) model, and the profiles of collision frequency are similar to those deduced from the model. Consistency checks between these collision frequencies and temperatures were performed, as were various simulations of the data. Neutral temperature profiles between 90 and 140 km on the four specific nights show variations from one night to another that are not correlated to magnetic activity. However, there are systematic variations during each night that can be attributed to atmospheric tides.

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