Results 1 to 10 of about 408,077 (211)

Multi-instrument probing of the polar ionosphere under steady northward IMF [PDF]

Annales Geophysicae, 2000
Observations are presented of the polar ionosphere under steady, northward IMF. The measurements, made by six complementary experimental techniques, including radio tomography, all-sky and meridian scanning photometer optical imaging, incoherent and ...
S. E. Pryse, S. E. Pryse, S. E. Pryse, A. M. Smith, A. M. Smith, A. M. Smith, L. Kersley, L. Kersley, L. Kersley, I. K. Walker, I. K. Walker, I. K. Walker, C. N. Mitchell, C. N. Mitchell, J. Moen, J. Moen, J. Moen, R. W. Smith, R. W. Smith   +18 more
doaj   +1 more source

Results of numerical modelling of the problem of video pulse ground penetrating radar research in freshwater bodies

Russian Journal of Earth Sciences, 2022
Ground-penetrating radar profiling on the surface of water bodies is applied in various geological and engineering studies. Here, we present the results of numerical simulation of the propagation of a video pulse electromagnetic signal in a freshwater ...
Gulevich Oxana, Volkomirskaya Liudmila, Mingalev Igor, Varenkov Vladimir, Suvorova Zoya, Akhmetov Oleg, Mingalev Oleg, Gulevich Oxana   +7 more
doaj   +1 more source

A new method to reconstruct the ionospheric convection patterns in the polar cap [PDF]

Annales Geophysicae, 1999
A new method to reconstruct the instantaneous convection pattern in the Earth's polar ionosphere is suggested. Plasma convection in the polar cap ionosphere is described as a hydrodynamic incompressible flow.
P. L. Israelevich, P. L. Israelevich, A. I. Ershkovich   +2 more
doaj   +1 more source

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, H. Liu, H. Liu, H. Liu, K. Schlegel, S.-Y. Ma, S.-Y. Ma   +6 more
doaj   +1 more source

A survey of magnetopause FTEs and associated flow bursts in the polar ionosphere [PDF]

Annales Geophysicae, 2000
Using the Equator-S spacecraft and SuperDARN HF radars an extensive survey of bursty reconnection at the magnetopause and associated flows in the polar ionosphere has been conducted.
D. A. Neudegg, D. A. Neudegg, D. A. Neudegg, S. W. H. Cowley, S. E. Milan, T. K. Yeoman, M. Lester, G. Provan, G. Haerendel, W. Baumjohann, B. Nikutowski, J. Büchner, U. Auster, K.-H. Fornacon, E. Georgescu, E. Georgescu   +15 more
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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, L. Kersley, M. J. Williams, I. K. Walker   +3 more
doaj   +1 more source

Assessment of Polar Ionospheric Observations by VIPIR/Dynasonde at Jang Bogo Station, Antarctica: Part 1—Ionospheric Densities

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, Geonhwa Jee, Young-Bae Ham, Nikolay Zabotin, Changsup Lee, Hyuck-Jin Kwon, Junseok Hong, Jeong-Han Kim, Terence Bullett   +8 more
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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, I. K. Walker, S. E. Pryse, I. Kersley, I. W. McCrea, T. B. Jones   +5 more
doaj   +1 more source

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, Kleimenova Natalia, Gromova Liudmila, Gromov Sergey, Malysheva Liudmila   +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, J. A. Cumnock, J. A. Cumnock, I. I. Alexeev, E. S. Belenkaya, S. Yu. Bobrovnikov, V. V. Kalegaev   +6 more
doaj   +1 more source