Turbulent upwelling of the mid-latitude ionosphere. I - Observational results by the MU radar

Details Turbulent upwelling of the mid-latitude ionosphere. I - Observational results by the MU radar Turbulent upwelling of the mid-latitude ionosphere. I - Observational results by the MU radar

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.3725f&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, March 1, 1991, p. 3725-3746.

Physics

88

Backscattering, E Region, F Region, Midlatitude Atmosphere, Radar Scattering, Scatter Propagation, Doppler Effect, Echoes, Ionosondes, Phased Arrays, Radar Measurement, Turbulent Flow

Scientific paper

Results are presented on a detailed ground-based VHF radar study of the turbulent upwelling in the midlatitude F region, using data from the active phased-array Japan's MU radar that include some auxiliary E-region coherent echoes. Results show that the coherent echo strength was often higher than was thermal scatter from the midlatitude F region. Simultaneous ionosonde measurements showed that these echoes occur during strong midlatitude spread F. The strongest echoes occurred in large patches which display away Doppler shifts corresponding to irregularity motions upward and northward from the radar. The away patches often have mean velocities well over 250 m/s and FWHM Doppler widths of 50 m/s. Possible explanations for the internal structure of the echoing patches are presented.

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