Other
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99..309s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A1, p. 309-317
Other
19
Equatorial Electrojet, Magnetohydrodynamic Waves, Plasma Drift, Plasma Turbulence, Spatial Resolution, Doppler Radar, Power Spectra, Radar Echoes, Radar Measurement
Scientific paper
Observations of the equatorial electorjet were made with unprecedented altitude resolution at the Jicamarca Radio Observatory in January 1990. We obtained high-quality Doppler spectra with 250-m and sometimes better altitude resolution at heights from 95 to 120 km during the daytime and early evening with the large 50-MHz radar. This resolution and coverage revealed a richness of dynamics and structure not previously appreciated, a structure that is sometimes reminiscent of VHF radar maps of equatorial spread F, albeit at smaller primary scale sizes. Individual scattering centers sometimes appear to drift in large swirls over many kilometers in altitude, maintaining their identity for times occasionally as long as a minute or two. On the other hand, we also see rapid variations with altitude (a kilometer or less) and time (a few seconds or less) in the Doppler spectra and signal power.
Farley Donald T.
Swartz Wesley E.
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