Combined ESR and EISCAT observations of the dayside polar cap and auroral oval during the May 15, 1997 storm [PDF]
Annales Geophysicae, 2000 The high-latitude ionospheric response to a major magnetic storm on May 15, 1997 is studied and different responses in the polar cap and the auroral oval are highlighted.
H. Liu +6 more
doaj +1 more source
The spatial structure of the dayside ionospheric trough [PDF]
Annales Geophysicae, 1998 Tomographic imaging provides a powerful technique for obtaining images of the spatial distribution of ionospheric electron density at polar latitudes. The method, which involves monitoring radio transmissions from the Navy Navigation Satellite System ...
S. E. Pryse +3 more
doaj +1 more source
Remote Sensing, 2022 Vertical incidence pulsed ionospheric radar (VIPIR) has been operated to observe the polar ionosphere with Dynasonde analysis software at Jang Bogo Station (JBS), Antarctica, since 2017.
Eunsol Kim +8 more
doaj +1 more source
Letter to the Editor: First complementary observations by ionospheric tomography, the EISCAT Svalbard radar and the CUTLASS HF radar [PDF]
Annales Geophysicae, 1998 Experimental results are presented from ionospheric tomography, the EISCAT Svalbard radar and the CUTLASS HF radar. Tomographic measurements on 10 October 1996, showing a narrow, field-aligned enhancement in electron density in the post-noon sector of
C. N. Mitchell +5 more
doaj +1 more source
Ionospheric challenges of the International Polar Year [PDF]
Eos, Transactions American Geophysical Union, 2007 Fifty years ago, the first International Geophysical Year (IGY) generated a huge step function increase in observations of ionospheric variability associated with the almost continuous geomagnetic activity experienced during the largest solar maximum of the past 100 years. In turn, these observations fueled more than a decade of theoretical advancement
Sojka, Jan Josef +5 more
openaire +3 more sources
HF propagation modelling within the polar ionosphere [PDF]
12th IET International Conference on Ionospheric Radio Systems and Techniques (IRST 2012), 2012 This paper illustrates the importance of understanding and taking into account the presence of various structural features in the polar ionosphere (in particular, patches and arcs of enhanced electron density) when planning and operating HF radio links.
Warrington, E. Michael +3 more
openaire +2 more sources
Supersubstorms during strong magnetic storm on 7 September 2017 [PDF]
E3S Web of Conferences, 2019 We analyzed the appearance of two supersubstorms observed during storm on September 07, 2017. Supersubstorms (SSS) are called substorms with SML index < - 2500 nT.
Despirak Irina +4 more
doaj +1 more source
Transpolar aurora: time evolution, associated convection patterns, and a possible cause [PDF]
Annales Geophysicae, 2005 We present two event studies illustrating the detailed relationships between plasma convection, field-aligned currents, and polar auroral emissions, as well as illustrating the influence of the Interplanetary Magnetic Field's y-component on theta ...
L. G. Blomberg +6 more
doaj +1 more source
Localized structure in the cusp and high-latitude ionosphere: a modelling study [PDF]
Annales Geophysicae, 1999 The ionospheric signature of a flux transfer event (FTE) seen in EISCAT radar data has been used as the basis for a modelling study using a new numerical model of the high-latitude ionosphere developed at the University of Sheffield, UK. The evolution
H. F. Balmforth +2 more
doaj +1 more source
An extended TRANSCAR model including ionospheric convection: simulation of EISCAT observations using inputs from AMIE [PDF]
Annales Geophysicae, 2005 The TRANSCAR ionospheric model was extended to account for the convection of the magnetic field lines in the auroral and polar ionosphere. A mixed Eulerian-Lagrangian 13-moment approach was used to describe the dynamics of an ionospheric plasma tube ...
P.-L. Blelly +6 more
doaj +1 more source