Akira Kadokura

TL;DR: In this paper, the authors demonstrate a close association between decameter-scale plasma irregularities in the E region ionosphere and auroral patches in the postmidnight sector, and demonstrate that the conductance enhancement associated with precipitating electrons not only modified the electric field within the aurora but also affected the generation of small scale plasma structures in the vicinity of the patch-type optical auroral forms.

TL;DR: In this paper, the authors present the initiation and development of Pi1-Pi2 band pulsations in concert with spatiotemporal evolution of preonset auroral arc during an isolated auroral substorm reported by Motoba et al.

TL;DR: In this article, the National Institute of Polar Research, 9-10, Kaga 1-chome, Itabashi-ku, Tokyo 173 2 Institute of Space and Astronautical Science, 1-1, Yoshinodai 3-chomes, Sagamihara 229 3 Department of Physics, University of Houston, Houston, Texas 77204-5504, U.S.A.

TL;DR: In this article, the effects of diurnal, seasonal, geomagnetic and solar activity on GPS Vertical Total Electron Content (VTEC) measurements at a high-latitude station in Husafell, Iceland (64.7°N, 21.0°W) from March 2009 to February 2010 were reported.

TL;DR: The Polar Data Centre of the National Institute of Polar Research has had the responsibility to manage the data for Japan as a National Antarctic Data Centre for the last two decades and is in collaboration with the Global Change Master Directory, the Polar Information Commons, and the newly established World Data System of the International Council for Science.