The auroral orientation curves for the IQSY

Details The auroral orientation curves for the IQSY The auroral orientation curves for the IQSY

Sep 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969p%26ss...17.1657g&link_type=abstract

Planetary and Space Science, Volume 17, Issue 9, p. 1657-1666.

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Scientific paper

The auroral orientation curves for IQSY have been evaluated from the all-sky camera data obtained at 13 stations. Comparing the orientation curves from IGY and IQSY it has been found that the dawn-dusk asymmetry which was pronounced in the IGY curves has disappeared in those of IQSY. On the other hand the day-night asymmetry remained unchanged between the two periods of time. The auroral oval defined from the occurrence of the aurora is closely related to the auroral orientation curves and it has been found that the auroral orientation curve crossing the midnight meridian at 68° corrected geomagnetic latitude is lying within the auroral oval for a corresponding period and this is 1° closer to the pole than during IGY. The majority of the auroral arcs are due to precipitated electrons in an energy range of about 1-20 keV. The precipitation pattern in this energy range as measured by satellites has been compared with the location of the auroral orientation curves and a reasonably good agreement has been found.

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