Imaging and photometric observations of proton aurora dynamics at Syowa Station,Antarctica

Using aurora data obtained with a multicolor all-sky imaging system (MAIS) and a tilting-filter photometer at Syowa Station (invariant magnetic lat., -66.1°), Antarctica, we have investigated the dynamics of proton auroras (Hβ emissions) and its relation to electron aurora dynamics. An all-sky SIT c...

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Bibliographic Details
Main Authors: Yukihiro Takahashi, Shoichi Okano, Takayuki Ono, Hiroshi Fukunishi
Format: Report
Language:English
Published: Department of Astrophysics and Geophysics, Tohoku University/Department of Astrophysics and Geophysics, Tohoku University/Department of Astrophysics and Geophysics, Tohoku University/Department of Astrophysics and Geophysics, Tohoku University 1995
Subjects:
Syowa Station
Tilting
Antarc*
Antarctica
Online Access:https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4167
http://id.nii.ac.jp/1291/00004167/
https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4167&item_no=1&attribute_id=18&file_no=1
Description
Summary:Using aurora data obtained with a multicolor all-sky imaging system (MAIS) and a tilting-filter photometer at Syowa Station (invariant magnetic lat., -66.1°), Antarctica, we have investigated the dynamics of proton auroras (Hβ emissions) and its relation to electron aurora dynamics. An all-sky SIT camera was also operated to monitor electron auroras. We obtained 4300 proton aurora images with MAIS on 29 nights in the period from May 1992 to September 1992. These data cover the magnetic local time sector from 14h to 4h and include various types of proton auroras in different substorm phases. It is found that when bright N-S auroras are seen in the bulge formed in an auroral breakup event, the region of proton aurora contracts poleward as the electron aurora in the bulge fades out, while when there are no N-S auroras in the bulge, the proton aurora remains equatorward.

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