The 3‐D Distribution of Artificial Aurora Induced by HF Radio Waves in the Ionosphere
| Autor: | Michael T. Rietveld, Björn Gustavsson, Tima Sergienko, Urban Brandstrom, Juha Vierinen, Andreas Kvammen, Theresa Rexer |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences Incoherent scatter VDP::Matematikk og Naturvitenskap: 400 Astrophysics High frequency 01 natural sciences Computational physics Geophysics Space and Planetary Science Physics::Space Physics Ionosphere Excitation VDP::Mathematics and natural science: 400 0105 earth and related environmental sciences Radio wave |
| Zdroj: | Journal of Geophysical Research: Space Physics. |
| ISSN: | 2169-9402 2169-9380 |
| DOI: | 10.1029/2018ja025988 |
| Popis: | We present 3‐D excitation rate estimates of artificial aurora in the ionospheric F layer, induced by high‐frequency radio waves from the European Incoherent Scatter heating facility. Simultaneous imaging of the artificial aurora was done with four separate Auroral Large Imaging System stations, permitting tomography‐like 3‐D auroral reconstruction of the enhanced atomic oxygen emissions at 6,300, 5,577, and 8,446 Å. Inspection of the 3‐D reconstructions suggests that the distribution of energized electrons is less extended in altitude than predicted by transport calculations of electrons accelerated to 2–100 eV. A possible reason for this discrepancy is that high‐frequency pumping might induce an anisotropic distribution of energized electrons. |
| Databáze: | OpenAIRE |
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