Zobrazeno 1 - 10
of 85
pro vyhledávání: '"T. Sergienko"'
Autor:
Y. Tanaka, Y. Ogawa, A. Kadokura, T. Aso, B. Gustavsson, U. Brändström, T. Sergienko, G. Ueno, S. Saita
Publikováno v:
Annales Geophysicae, Vol 42, Pp 179-190 (2024)
EISCAT_3D is a project to build a multi-site phased-array incoherent scatter radar system in northern Fenno-Scandinavia. We demonstrate via numerical simulation how useful monochromatic images taken by a multi-point imager network are for auroral res
Externí odkaz:
https://doaj.org/article/100ca71dabc9430ca3c840ce7747021b
Autor:
J. A. Carter, M. Dunlop, C. Forsyth, K. Oksavik, E. Donovon, A. Kavanagh, S. E. Milan, T. Sergienko, R. C. Fear, D. G. Sibeck, M. Connors, T. Yeoman, X. Tan, M. G. G. T. Taylor, K. McWilliams, J. Gjerloev, R. Barnes, D. D. Billet, G. Chisham, A. Dimmock, M. P. Freeman, D.-S. Han, M. D. Hartinger, S.-Y. W. Hsieh, Z.-J. Hu, M. K. James, L. Juusola, K. Kauristie, E. A. Kronberg, M. Lester, J. Manuel, J. Matzka, I. McCrea, Y. Miyoshi, J. Rae, L. Ren, F. Sigernes, E. Spanswick, K. Sterne, A. Steuwer, T. Sun, M.-T. Walach, B. Walsh, C. Wang, J. Weygand, J. Wild, J. Yan, J. Zhang, Q.-H. Zhang
Publikováno v:
Earth and Planetary Physics, Vol 8, Iss 1, Pp 275-298 (2024)
The joint European Space Agency and Chinese Academy of Sciences Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) mission will explore global dynamics of the magnetosphere under varying solar wind and interplanetary magnetic field conditions,
Externí odkaz:
https://doaj.org/article/29ec98756c3e4a33a1af2dd02c80e1c1
Publikováno v:
Annales Geophysicae, Vol 41, Pp 589-600 (2023)
The EISCAT (European Incoherent Scatter Scientific Association) Heating facility was used to transmit powerful high-frequency (HF) electromagnetic waves into the F-region ionosphere to enhance optical emissions at 557.7 and 630.0 nm from atomic oxyge
Externí odkaz:
https://doaj.org/article/c95420d8ba7e4813a52463aedf48c6b9
Autor:
M. Fukizawa, T. Sakanoi, Y. Tanaka, Y. Ogawa, K. Hosokawa, B. Gustavsson, K. Kauristie, A. Kozlovsky, T. Raita, U. Brändström, T. Sergienko
Publikováno v:
Annales Geophysicae, Vol 40, Pp 475-484 (2022)
In recent years, aurora observation networks using high-sensitivity cameras have been developed in the polar regions. These networks allow dimmer auroras, such as pulsating auroras (PsAs), to be observed with a high signal-to-noise ratio. We reconstr
Externí odkaz:
https://doaj.org/article/e356420bff4e44ac8e9153429b01f2a8
Publikováno v:
Annales Geophysicae, Vol 32, Pp 499-506 (2014)
The auroral emission of the first negative system of N2+ at 427.8 nm is analyzed using simultaneous measurements from the ground with ALIS (Auroral Large Imaging System) and from space with optical (MAC) and particle (ESA) instruments of the Reime
Externí odkaz:
https://doaj.org/article/2ef0bfb1d97c424fb74a8475bbdad75c
Publikováno v:
Annales Geophysicae, Vol 31, Pp 1681-1687 (2013)
Natural enhancements in the backscattered power of incoherent scatter radars up to 5 orders of magnitudes above the thermal backscatter are sometimes observed at high latitudes. Recently observations of enhancements in the backscattered power incl
Externí odkaz:
https://doaj.org/article/ab8f2d63f562471c97892c385198c42f
Publikováno v:
Annales Geophysicae, Vol 31, Pp 1177-1190 (2013)
Polar mesosphere winter echoes (PMWE) were detected by two radars, ESRAD at 52 MHz located near Kiruna, Sweden, and EISCAT at 224 MHz located near Tromsø, Norway, during the strong solar proton event on 11–12 November 2004. PMWE maximum volume
Externí odkaz:
https://doaj.org/article/52095190ac8c4daf8df5a8f6f84cecc4
Publikováno v:
Annales Geophysicae, Vol 30, Pp 1693-1701 (2012)
We present the results of a statistical study using optical images from ALIS (Auroral Large Imaging System) to investigate the spatial and temporal variations of structures in diffuse aurora. Analysis of conjugate Reimei data shows that such fine
Externí odkaz:
https://doaj.org/article/291b99b24ac0447e8690c56b1390264f
Publikováno v:
Annales Geophysicae, Vol 30, Pp 983-990 (2012)
In November 2008 and in March and April 2009 the Indian MST radar (53 MHz) at Gadanki was operated during the daytime in a special experiment, with 600 m altitude resolution, for understanding the characteristics of low-latitude mesospheric echoes
Externí odkaz:
https://doaj.org/article/e84acc95ccc246119dbf8428abe3e338
Publikováno v:
Annales Geophysicae, Vol 30, Pp 885-895 (2012)
Strong enhancement of the optical emissions with excitation threshold from 1.96 eV (630.0 nm from O(1D)) up to 18.75 eV (427.8 nm from N2+(1NG)) have been observed during experiments of the ionosphere modification by high power HF radio waves. Ana
Externí odkaz:
https://doaj.org/article/def4630d9aa443e7a0531a77b27c9fdf