Physics
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.5745n&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 88, July 1, 1983, p. 5745-5750.
Physics
108
Drift Rate, Eiscat Radar System (Europe), Ionospheric Drift, Radar Measurement, Radio Auroras, Coherent Radar, Flow Theory, Ion Acoustic Waves, Kinetic Theory, Phase Velocity
Scientific paper
The accuracy of Scandinavian Twin Auroral Radar Experiment (STARE) estimates of ionospheric electron drift velocities has been tested by comparison with simultaneous velocity measurements of the European Incoherent Scatter facility (EISCAT). While STARE estimated drift velocity magnitudes are in agreement with EISCAT figures for velocities smaller than 700 m/sec, the estimates become too low with increasing velocity. Agreement is obtained in the directions of estimated vectors for all drift magnitudes. The measured phase velocities are noted to be even lower than those predicted by the kinetic theory of the two-stream instability. These data are not inconsistent with the assumption that the possible phase velocities in the plasma are limited upward by the ion-acoustic velocity.
Nielsen Edward
Schlegel Kristian
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