STARE and EISCAT measurements - Evidence for the limitation of STARE Doppler velocity observations by the ion acoustic velocity

Details STARE and EISCAT measurements - Evidence for the limitation of STARE Doppler velocity observations by the ion acoustic velocity STARE and EISCAT measurements - Evidence for the limitation of STARE Doppler velocity observations by the ion acoustic velocity

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9519131k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Nov. 1, 1990, p. 19131-19135. Research supported by CNRS.

Physics

19

Eiscat Radar System (Europe), Ion Acoustic Waves, Phase Velocity, Propagation Velocity, Radar Measurement, Doppler Effect, Drift Rate

Scientific paper

Measurements of the phase velocity of ionospheric plasma waves using the STARE radar system are compared with the electron drift velocity and the ion acoustic velocity calculated from data measured by EISCAT. This comparison shows that, for those flow angles that are smaller than the largest flow angle (theta-s) for which the component of the electron drift velocity along the radar line of sight equals the ion acoustic velocity, the phase velocity observed by STARE tends to be limited by, or lower than, the ion acoustic velocity. Using observations with flow angles larger than theta-s, the electron drift can be inferred from STARE measurements by the well-known cosine relation.

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