Zobrazeno 1 - 10
of 2 406
pro vyhledávání: '"R. Fujii"'
Publikováno v:
History of Geo- and Space Sciences, Vol 14, Pp 61-69 (2023)
In Sect. 1, the original planning of Japanese Svalbard IS (incoherent scatter) radar with phased-array antennas is described. In 1988, this plan was proposed as one of the major projects for the forthcoming Solar–Terrestrial Environment Laboratory,
Externí odkaz:
https://doaj.org/article/4cb12ac3469d4e5e9392ffa0f0510bff
Publikováno v:
Kidney International Reports, Vol 6, Iss 4, Pp S32- (2021)
Externí odkaz:
https://doaj.org/article/294a7d7ebbe84500b24abd4a292e6da2
Autor:
T. Takahashi, S. Nozawa, T. T. Tsuda, Y. Ogawa, N. Saito, T. Hidemori, T. D. Kawahara, C. Hall, H. Fujiwara, N. Matuura, A. Brekke, M. Tsutsumi, S. Wada, T. Kawabata, S. Oyama, R. Fujii
Publikováno v:
Annales Geophysicae, Vol 33, Pp 941-953 (2015)
We have quantitatively evaluated generation mechanisms of a sporadic sodium layer (SSL) based on observational data obtained by multiple instruments at a high-latitude station: Ramfjordmoen, Tromsø, Norway (69.6° N, 19.2° E). The sodium lidar o
Externí odkaz:
https://doaj.org/article/c23f6932deb2407aa04f8c4ecb8455cb
Autor:
T. Takahashi, S. Nozawa, M. Tsutsumi, C. Hall, S. Suzuki, T. T. Tsuda, T. D. Kawahara, N. Saito, S. Oyama, S. Wada, T. Kawabata, H. Fujiwara, A. Brekke, A. Manson, C. Meek, R. Fujii
Publikováno v:
Annales Geophysicae, Vol 32, Pp 1195-1205 (2014)
This paper is primarily concerned with an event observed from 16:30 to 24:30 UT on 29 October 2010 during a very geomagnetically quiet interval (Kp ≤ 1). The sodium LIDAR observations conducted at Tromsø, Norway (69.6° N, 19.2° E) captured
Externí odkaz:
https://doaj.org/article/6a027e6b844243328bb96bbf8f83b81f
Autor:
O. Amm, A. Aruliah, S. C. Buchert, R. Fujii, J. W. Gjerloev, A. Ieda, T. Matsuo, C. Stolle, H. Vanhamäki, A. Yoshikawa
Publikováno v:
Annales Geophysicae, Vol 26, Pp 3913-3932 (2008)
Traditionally, due to observational constraints, ionospheric modelling and data analysis techniques have been devised either in one dimension (e.g. along a single radar beam), or in two dimensions (e.g. over a network of magnetometers). With new u
Externí odkaz:
https://doaj.org/article/bc2c852883a749738f6ac09c43e7c267
Publikováno v:
Annales Geophysicae, Vol 26, Pp 2837-2844 (2008)
Observations by the EISCAT Svalbard radar show that electron temperatures Te in the cusp electrojet reach up to about 4000 K. The heat is tapped and converted from plasma convection in the near Earth space by a Pedersen current that is carried
Externí odkaz:
https://doaj.org/article/0cb09b3c78ce40149cb5db56cb228898
Publikováno v:
Annales Geophysicae, Vol 26, Pp 2427-2433 (2008)
Two long runs of EISCAT Svalbard Radar (ESR), in February 2001 and October 2002, have been analysed with respect to variability in the F2 region peak density and altitude. The diurnal variation in the F2 peak density exhibits one maximum around 12
Externí odkaz:
https://doaj.org/article/498cbab0001a41adaed4afb7ad07cd5e
Publikováno v:
Climate of the Past, Vol 4, Iss 1, Pp 1-9 (2008)
A continuous lacustrine sediment core obtained from the Kathmandu Valley in the Central Himalayas revealed that cyclical changes in C3/C4 vegetation corresponded to global glacial-interglacial cycles from marine isotope stages (MIS) 15 to MIS 4. The
Externí odkaz:
https://doaj.org/article/e4edc138e9dd45838943756a280b7844
Publikováno v:
Annales Geophysicae, Vol 24, Pp 3351-3364 (2006)
Naturally enhanced ion-acoustic lines (NEIALs) between 1200 and 1900 km altitude are investigated. The NEIALs were found in the background gates of data from the European Incoherent Scatter (EISCAT) Svalbard radar (ESR) at 78° N looking field-ali
Externí odkaz:
https://doaj.org/article/e1a3f1779c794c4da759e1d9d998e6e0
Publikováno v:
Annales Geophysicae, Vol 22, Pp 889-899 (2004)
We report on observations of a diverging ion flow along the geomagnetic field that is often seen at the EISCAT Svalbard radar. The flow is upward above the peak of the electron density in the F-region and downward below the peak. We estimate that
Externí odkaz:
https://doaj.org/article/431d73afa799422dbb6ec94a607e0723