Unmanned Magnetometer Network Observation in the 44th Japanese Antarctic Research Expedition: Initial Results and an Event Study on Auroral Substorm Evolution

概要

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In the 44th Japanese Antarctic Research Expedition (JARE-44) in 2003-2004, four unmannedmagnetometers were deployed at four sites in the Antarctic to perform a network observation of upper atmosphere physics phenomena. Three of them were set about 80 km from Syowa Station, and the other was at Dome Fuji Camp, about 800 km from Syowa. Observations were carried out continuously with a maximum sampling rate of 1 second until they were terminated. The purpose of the close network around Syowa was to observe the two-dimensional distribution of the ionospheric equivalent current in a localized area within the field-of-view of the all-sky auroral imager at Syowa. Dome Fuji is located around the higher latitude edge of the auroral zone, while Syowa is at middle of it. Auroral observation with the all-sky imager was also carried out at Dome Fuji in 2003. Such a simultaneous auroral and magnetic observation both at Dome Fuji and Syowa enables us to study auroral activities in a larger scale. In this paper, the deployment and performance of the unmanned magnetometers in the JARE-44 are reported and one auroral substorm event is analyzed in some detail to show the usefulness of this kind of magnetometer network.
国立極地研究所の論文