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HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere
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| Zeitschriftentitel: | Journal of Geophysical Research: Space Physics |
|---|---|
| Personen und Körperschaften: | , , , , |
| In: | Journal of Geophysical Research: Space Physics, 117, 2012, A5 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
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| Schlagwörter: |
| author_facet |
Cohen, M. B. Golkowski, M. Lehtinen, N. G. Inan, U. S. McCarrick, M. J. Cohen, M. B. Golkowski, M. Lehtinen, N. G. Inan, U. S. McCarrick, M. J. |
|---|---|
| author |
Cohen, M. B. Golkowski, M. Lehtinen, N. G. Inan, U. S. McCarrick, M. J. |
| spellingShingle |
Cohen, M. B. Golkowski, M. Lehtinen, N. G. Inan, U. S. McCarrick, M. J. Journal of Geophysical Research: Space Physics HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics |
| author_sort |
cohen, m. b. |
| spelling |
Cohen, M. B. Golkowski, M. Lehtinen, N. G. Inan, U. S. McCarrick, M. J. 0148-0227 American Geophysical Union (AGU) Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics http://dx.doi.org/10.1029/2012ja017585 <jats:p>ELF/VLF (0.3–30 kHz) wave generation is achievable via modulated HF (3–30 MHz) heating of the lower ionosphere in the presence of natural currents such as the auroral electrojet. Using the 3.6 MW High Frequency Active Auroral Research Program (HAARP) facility near Gakona, AK, we investigate the effect of HF frequency and beam size on the generated ELF/VLF amplitudes, as a function of modulation frequency, and find that generation in the Earth‐ionosphere waveguide generally decreases with increasing HF frequency between 2.75–9.50 MHz. HAARP is also capable of spreading the HF power over a wider area, and we find that a larger beam area yields larger generated amplitudes on the ground. Measurements are shown to generally agree with a theoretical model, which is then applied to also predict the effect of HF beam parameters on magnetospheric injection with HAARP.</jats:p> HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere Journal of Geophysical Research: Space Physics |
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10.1029/2012ja017585 |
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Geologie und Paläontologie Geographie Chemie und Pharmazie Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft Biologie Allgemeine Naturwissenschaft Physik Technik |
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| title |
HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| title_unstemmed |
HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| title_full |
HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| title_fullStr |
HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| title_full_unstemmed |
HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| title_short |
HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| title_sort |
hf beam parameters in elf/vlf wave generation via modulated heating of the ionosphere |
| topic |
Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics |
| url |
http://dx.doi.org/10.1029/2012ja017585 |
| publishDate |
2012 |
| physical |
|
| description |
<jats:p>ELF/VLF (0.3–30 kHz) wave generation is achievable via modulated HF (3–30 MHz) heating of the lower ionosphere in the presence of natural currents such as the auroral electrojet. Using the 3.6 MW High Frequency Active Auroral Research Program (HAARP) facility near Gakona, AK, we investigate the effect of HF frequency and beam size on the generated ELF/VLF amplitudes, as a function of modulation frequency, and find that generation in the Earth‐ionosphere waveguide generally decreases with increasing HF frequency between 2.75–9.50 MHz. HAARP is also capable of spreading the HF power over a wider area, and we find that a larger beam area yields larger generated amplitudes on the ground. Measurements are shown to generally agree with a theoretical model, which is then applied to also predict the effect of HF beam parameters on magnetospheric injection with HAARP.</jats:p> |
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| author | Cohen, M. B., Golkowski, M., Lehtinen, N. G., Inan, U. S., McCarrick, M. J. |
| author_facet | Cohen, M. B., Golkowski, M., Lehtinen, N. G., Inan, U. S., McCarrick, M. J., Cohen, M. B., Golkowski, M., Lehtinen, N. G., Inan, U. S., McCarrick, M. J. |
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| description | <jats:p>ELF/VLF (0.3–30 kHz) wave generation is achievable via modulated HF (3–30 MHz) heating of the lower ionosphere in the presence of natural currents such as the auroral electrojet. Using the 3.6 MW High Frequency Active Auroral Research Program (HAARP) facility near Gakona, AK, we investigate the effect of HF frequency and beam size on the generated ELF/VLF amplitudes, as a function of modulation frequency, and find that generation in the Earth‐ionosphere waveguide generally decreases with increasing HF frequency between 2.75–9.50 MHz. HAARP is also capable of spreading the HF power over a wider area, and we find that a larger beam area yields larger generated amplitudes on the ground. Measurements are shown to generally agree with a theoretical model, which is then applied to also predict the effect of HF beam parameters on magnetospheric injection with HAARP.</jats:p> |
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| spelling | Cohen, M. B. Golkowski, M. Lehtinen, N. G. Inan, U. S. McCarrick, M. J. 0148-0227 American Geophysical Union (AGU) Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics http://dx.doi.org/10.1029/2012ja017585 <jats:p>ELF/VLF (0.3–30 kHz) wave generation is achievable via modulated HF (3–30 MHz) heating of the lower ionosphere in the presence of natural currents such as the auroral electrojet. Using the 3.6 MW High Frequency Active Auroral Research Program (HAARP) facility near Gakona, AK, we investigate the effect of HF frequency and beam size on the generated ELF/VLF amplitudes, as a function of modulation frequency, and find that generation in the Earth‐ionosphere waveguide generally decreases with increasing HF frequency between 2.75–9.50 MHz. HAARP is also capable of spreading the HF power over a wider area, and we find that a larger beam area yields larger generated amplitudes on the ground. Measurements are shown to generally agree with a theoretical model, which is then applied to also predict the effect of HF beam parameters on magnetospheric injection with HAARP.</jats:p> HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere Journal of Geophysical Research: Space Physics |
| spellingShingle | Cohen, M. B., Golkowski, M., Lehtinen, N. G., Inan, U. S., McCarrick, M. J., Journal of Geophysical Research: Space Physics, HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere, Paleontology, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Atmospheric Science, Earth-Surface Processes, Geochemistry and Petrology, Soil Science, Water Science and Technology, Ecology, Aquatic Science, Forestry, Oceanography, Geophysics |
| title | HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| title_full | HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| title_fullStr | HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| title_full_unstemmed | HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| title_short | HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| title_sort | hf beam parameters in elf/vlf wave generation via modulated heating of the ionosphere |
| title_unstemmed | HF beam parameters in ELF/VLF wave generation via modulated heating of the ionosphere |
| topic | Paleontology, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Atmospheric Science, Earth-Surface Processes, Geochemistry and Petrology, Soil Science, Water Science and Technology, Ecology, Aquatic Science, Forestry, Oceanography, Geophysics |
| url | http://dx.doi.org/10.1029/2012ja017585 |