Coherent radar Doppler measurements and their relationship to the ionospheric electron drift velocity

Details Coherent radar Doppler measurements and their relationship to the ionospheric electron drift velocity Coherent radar Doppler measurements and their relationship to the ionospheric electron drift velocity

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.3498n&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, April 1, 1985, p. 3498-3504.

Physics

147

Doppler Radar, E Region, Ionospheric Drift, Ionospheric Electron Density, Plasma Waves, Auroral Zones, Coherent Radar, Electrojets, Electron Energy, Electron Mobility, Ion Temperature

Scientific paper

An examination has been conducted of the relationship between the radial mean Doppler velocities observed with coherent radars, such as in the STARE (Scandinavian Twin Auroral Radar Experiment) system, and the electron drift velocities observed with an incoherent scatter facility. The two sets of measurements were made simultaneously and can with high accuracy be related to a common magnetic flux tube. It is found that the Doppler velocities of electron density irregularities produced by the two-stream instability in the E region are limited to a value near the ion acoustic velocity. Moreover, it is found that this value is a strong function of the electron drift velocity, in agreement with theoretical predictions. An algorithm has been determined which makes it possible to use the STARE data to derive estimates of the electron drift velocity which are in excellent agreement with values deduced from EISCAT (European Incoherent Scatter Facility) data.

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