Middle and upper atmosphere radar observations of ionospheric electric fields

Details Middle and upper atmosphere radar observations of ionospheric electric fields Middle and upper atmosphere radar observations of ionospheric electric fields

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9811615o&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A7, p. 11,615-11,627.

Computer Science

Sound

21

Electric Fields, Ionospheric Currents, Ionospheric Sounding, Radar Measurement, Diurnal Variations, Pulse Doppler Radar

Scientific paper

The study reports middle and upper (MU) atmosphere radar observations of electric fields over the period September 1986 to January 1991 in the form of time-of-day variations for several different seasonal and solar activity cases. The perpendicular north velocity has, on average, a smooth and distinct northward excursion from 0600-1500 LT followed by a period of constant southward velocity until midnight and then a slow linear change to merge with the daytime northward excursion period. The perpendicular east velocity is characterized by a major eastward excursion in the evening and a minor eastward excursion in the morning, with a tendency to level off or form a slight additional local eastward excursion after midnight. The morning excursion has no comparable counterpart in existing electric field models or data averages from Arecibo or Jicamarca. It is suggested that this may be a semidiurnal component that provides evidence for enhanced propagation of the semidiurnal tide at the location of the MU radar.

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