Physics
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994angeo..12..642r&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 12, no. 7, p. 642-648
Physics
16
Augmentation, Electron Density (Concentration), F Region, Interplanetary Magnetic Fields, Night Sky, Polar Regions, Backscattering, Data Correlation, Line Of Sight, Radar Scattering, Velocity Distribution
Scientific paper
The presence of polar patches as observed simultaneously in the same magnetic meridian of opposite nightside ionospheres by coherent and incoherent scatter radars are described. The patches appear to be related to variations either in the B(sub z) or B(sub y) component of the interplanetary magnetic field which cause transient merging on the dayside magnetopause. The passage and characteristics of polar patches as they traverse the polar cap into the nightside auroral oval are not significantly affected by the occurrence of small substorms. This study illustrates how the observations of polar patches in the nightside high-latitude ionosphere could be of great value in determining their formation process.
Baker Kile B.
de La Beaujardiere Odile
Dudeney John R.
Pinnock Michael
Rodger Alan S.
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