Takamatsu et al. (2023) reprocesses the daily station coordinates of Japan's GNSS observation network "GEONET" since 1996 based on the newly developed analysis strategy "F5". Processing under the global baseline network, they achieve millimeter level… もっと読む
The Planetary Material Sample Curation Facility3 of JAXA is responsible for initial description of valuable returned samples, publication of catalog data2, sample storage, and sample distribution to researchers worldwide. As part of curatorial works,… もっと読む
Equatorial spread F (ESF) occurs globally at low magnetic latitudes in the Earth’s nighttime ionosphere. ESF is well-known for its adverse effect on the propagation of radio waves affecting navigation, telecommunication, and scientific satellite syst… もっと読む
When we gaze out on the distant universe, we see billions of galaxies and we also see hundreds of billions of stars in our own galaxy, the Milky Way. Whether we observe in the narrow wavelength band accessible to our human eyes, or we expand our visi… もっと読む
Fournier et al. (2021) report on physics-based secular variation forecasts for the international geomagnetic reference field (IGRF). Analysis of satellite data from 2000 onwards reveals that IGRF forecasts are worse at times of fast geomagnetic chang… もっと読む
Caudron et al. (2021) explores the seismic data associated with unrest and eruptions which occurred at Whakaari/White Island volcano in New Zealand for the last ~15 years. Using novel proxies taking advantage of continuous seismic records complemente… もっと読む
太陽フレアなどの太陽で発生する突発的な爆発現象は地球周辺の宇宙環境を乱すのみならず情報化社会の基盤にも障害を与える場合があります。しかし、太陽面爆発現象とその影響に関する詳細なメカニズムは未だ十分に解明されていません。それゆえ、高度に情報化した現代社会にとって宇宙天気擾乱は潜在的なリスクとなっています。太陽地球圏環境予測プロジェクト（PSTEP）は基礎科学研究と宇宙天気予報運用の相乗的な発展のもとに、その状況を改善する目的で組織されました。PSTEPは2015年4月より2020年3月まで実施され… もっと読む
