Drift motions of very high latitude F region irregularities Azimuthal Doppler analysis

Details Drift motions of very high latitude F region irregularities Azimuthal Doppler analysis Drift motions of very high latitude F region irregularities Azimuthal Doppler analysis

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.9717h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Oct. 1, 1985, p. 9717-9725. USAF-supported research.

Physics

16

Azimuth, Doppler Radar, F Region, Ionospheric Drift, Polar Regions, Signal Analysis, Autocorrelation, High Frequencies, Incoherent Scatter Radar, Nonuniform Flow, Plasma Drift

Scientific paper

Since October 1983, a new HF radar facility has been operated from Goose Bay, Labrador, for the purpose of studying high-latitude ionospheric irregularities. In this paper, autocorrelation functions of the backscattered signals from these irregularities are presented, and it is shown how these are processed to yield information on the drift velocities of the irregularities. Since the radar is typically operated in an azimuth scan mode, the Doppler data derived from the autocorrelation functions may be used to study the two-dimensional structure of the irregularity drift. A procedure is presented for this analysis, and it is shown that the results are reasonably accurate during periods in which the irregularity drift is approximately uniform. However, if the flow is nonuniform, as it is in the vicinity of the cusp and in the midnight local time sector, then the procedure leads to erroneous results. Consideration is given to the implication that these results have on azimuth scan measurements of plasma drift with incoherent scatter radars, and possible ways in which measurements might be made under nonuniform flow conditions are presented.

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