Abstract
The auroral observation has been started at Jang Bogo Station (JBS), Antarctica
by using a visible All-sky camera (v-ASC) in 2018 to routinely monitor the aurora in
association with the simultaneous observations of the ionosphere, thermosphere and
magnetosphere at the station. In this article, the auroral observations are introduced
with the analysis procedure to recognize the aurora from the v-ASC image data and to
compute the auroral occurrences and the initial results on their spatial and temporal
distributions are presented. The auroral occurrences are mostly confined to the northern
horizon in the evening sector and extend to the zenith from the northwest to cover
almost the entire sky disk over JBS at around 08 MLT (magnetic local time; 03 LT) and
then retract to the northeast in the morning sector. At near the magnetic local noon,
the occurrences are horizontally distributed in the northern sky disk, which shows the
auroral occurrences in the cusp region. The results of the auroral occurrences indicate
that JBS is located most of the time in the polar cap near the poleward boundary of the
auroral oval in the nightside and approaches closer to the oval in the morning sector.
At around 08 MLT (03 LT), JBS is located within the auroral oval and then moves away
from it, finally being located in the cusp region at the magnetic local noon, which
indicates that the location of JBS turns out to be ideal to investigate the
variabilities of the poleward boundary of the auroral oval from long-term observations
of the auroral occurrences. The future plan for the ground auroral observations near JBS
is presented.
Publisher
The Korean Space Science Society
Subject
General Earth and Planetary Sciences,General Physics and Astronomy
Cited by
5 articles.
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