Effects of interplanetary magnetic field on the distribution of radioaurora in the southern polar cap

Details Effects of interplanetary magnetic field on the distribution of radioaurora in the southern polar cap Effects of interplanetary magnetic field on the distribution of radioaurora in the southern polar cap

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986p%26ss...34..307v&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 34, March 1986, p. 307-309, 311-314.

Mathematics

Probability

5

Interplanetary Magnetic Fields, Polar Caps, Radio Auroras, Diurnal Variations, Electric Field Strength, Radar Echoes, Spatial Distribution

Scientific paper

The radar-based results on the spatial distribution of the radio aurora in the southern polar region, carried out at the Australian station Davis Base, is analyzed. The perfect aspect conditions at the Davis Base made it possible to see the radio aurora in the latitude range of 76-84 deg at any time of a day. The results indicate that the probability of radio aurora occurrence is at the maximum in the daytime cusp region, which is at the latitude of 78-79 deg when Bz is less than 0, and at 79-80 deg when Bz is greater than 0. The maximum of the radio aurora occurrence is displaced towards the morning hours when both Bz and By are either less than 0 or greater than 0. The maximum of the occurrence is shifted toward the evening hours when Bz is less than 0 while By is greater than 0, or when Bz is greater than 0 while the By is less than 0. The displacement of the radio aurora into the morning or evening sector is considered to be a result of redistribution of the electric field intensity in the dayside polar cap.

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