Physics
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14.1187h&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 14, Dec. 1987, p. 1187-1190. SERC-supported research.
Physics
15
Auroral Zones, Eiscat Radar System (Europe), Electron Density (Concentration), Mesosphere, Radar Measurement, Negative Ions, Neutral Atmospheres, Wave Propagation
Scientific paper
In February 1987, the Eiscat VHF system came into regular operation and the first full experiments were designed to observed the D-region. The hardware configuration, the radar modulation, and the analysis method, which differs from that employed for the E-region and above, are described. Examples of data obtained on two days are presented. The electron concentration is calculated, and tentative estimates of the ratio of negative ions to free electrons is made. The Doppler shifts in the received echoes are examined, and vertical plasma velocities are calculated which are assumed to represent the neutral air motion.
Hall Carter
Hoppe Ulf-Peter
Jones Owen L. G.
Williams J. S. P.
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