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| 2. |
- Morosan, D. E., et al.
(författare)
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LOFAR tied-array imaging of Type III solar radio bursts
- 2014
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 568, s. articl no. A67-
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Tidskriftsartikel (refereegranskat)abstract
- Context. The Sun is an active source of radio emission which is often associated with energetic phenomena such as solar flares and coronal mass ejections (CMEs). At low radio frequencies (
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| 3. |
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| 4. |
- Blagoveshchenskaya, N.F., Kornienko, V.A., Borisova, T.D., Thidé, B., Kosch, M.J., Rietveld, M.T., Mishin, E.V., Luk'yanova, R.Y. and Troshichev, O.A.
(författare)
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Ionospheric HF pump wave triggering of local auroral activation.
- 2001
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Ingår i: Journal of Geophysical Research. ; 106, s. 29071-29089
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Tidskriftsartikel (refereegranskat)abstract
- Experimental results from ionospheric HF pumping experiments in the nightside auroral E region above Tromso are reported. We found intriguing evidence that a modification of the ionosphere-magnetosphere coupling, due to the effects of powerful HF waves be
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| 5. |
- Blagoveshchenskaya, N.F., Kornienko, V.A., Rietveld, M.T., Thidé, B., Brekke, A., Moskvin, I.V., Nodrachev, S.
(författare)
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Stimulated emissions around second harmonic of Tromsø heater frequency observed by long-distance diagnostic HF tools
- 1998
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Ingår i: Geophysical Research Letters. ; 25, s. 863-876
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Tidskriftsartikel (refereegranskat)
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| 6. |
- Carozzi, TD, et al.
(författare)
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Full polarimetry measurements of stimulated electromagnetic emissions: First results
- 2001
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Ingår i: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS. - : AMER GEOPHYSICAL UNION. - 0148-0227. ; 106:A10, s. 21395-21407
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Tidskriftsartikel (refereegranskat)abstract
- A theory and technique for the measurement of the full state of polarization (SOP) for wideband electromagnetic HF emissions from the ionosphere are introduced. The technique was employed in a recent experiment at the Sura ionospheric HF pumping facility
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| 7. |
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| 8. |
- Eliasson, B., et al.
(författare)
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Simulation study of the interaction between large-amplitude HF radio waves and the ionosphere
- 2007
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Ingår i: Geophysical Research Letters. - 0094-8276 .- 1944-8007. ; 34:L0610
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Tidskriftsartikel (refereegranskat)abstract
- The time evolution of a large-amplitude electromagnetic (EM) wave injected vertically into the overhead ionosphere is studied numerically. The EM wave has a carrier frequency of 5 MHz and is modulated as a Gaussian pulse with a width of approximately 0.1 milliseconds and a vacuum amplitude of 1.5 V/m at 50 km. This is a fair representation of a modulated radio wave transmitted from a typical high-power HF broadcast station on the ground. The pulse is propagated through the neutral atmosphere to the critical points of the ionosphere, where the L-O and R-X modes are reflected, and back to the neutral atmosphere. We observe mode conversion of the L-O mode to electrostatic waves, as well as harmonic generation at the turning points of both the R-X and L-O modes, where their amplitudes rise to several times the original ones. The study has relevance for ionospheric interaction experiments in combination with ground-based and satellite or rocket observations.
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| 9. |
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| 10. |
- Frolov, V.L., Erukhimov, L.M., Komrakov, G.P., Sergeev, E.N., Thidé, B., Bernhardt, P. Wagner, L.S., Goldstein, J.A., Selcher, G.
(författare)
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On the Enhancement of the BUM SEE Feature by Additional Pulse Heating of the onospheric Plasma
- 1997
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Ingår i: Radiophysics and Quantum Electronics. ; 40, s. 371-386
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Tidskriftsartikel (refereegranskat)
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