Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer
A high frequency (HF) ionospheric modification experiment was carried out between 25 September and 8 October 2004, using the EISCAT HF transmitter located near Tromsø, Norway. During this experiment the spectra of the stimulated HF sideband waves (stimulated electromagnetic emission or SEE) induced...
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ftcopernicus:oai:publications.copernicus.org:angeo35944 2023-05-15T16:04:32+02:00 Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer Tereshchenko, E. D. Yurik, R. Yu. Khudukon, B. Z. Rietveld, M. T. Isham, B. Belyey, V. Brekke, A. Hagfors, T. Grill, M. 2018-09-27 application/pdf https://doi.org/10.5194/angeo-24-1819-2006 https://angeo.copernicus.org/articles/24/1819/2006/ eng eng doi:10.5194/angeo-24-1819-2006 https://angeo.copernicus.org/articles/24/1819/2006/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.5194/angeo-24-1819-2006 2020-07-20T16:27:14Z A high frequency (HF) ionospheric modification experiment was carried out between 25 September and 8 October 2004, using the EISCAT HF transmitter located near Tromsø, Norway. During this experiment the spectra of the stimulated HF sideband waves (stimulated electromagnetic emission or SEE) induced by the HF pump were observed using an interferometer consisting of three spaced receiving antennas with baselines both along and perpendicular to the meridian, and a multi-channel coherent receiver, installed in the vicinity of the HF facility. The transmitter operated at 4040kHz and its antenna beam was scanned to angles of 0°, 7°, 14°, and 21° south from vertical, pausing 4min at each position. This paper focuses on features of the downshifted peak (DP) emission, which has not been as thoroughly studied as many of the other SEE spectral features observable within the EISCAT pump frequency range. It was found that the signal-weighted direction of the DP source region remained within 5° of magnetic zenith as the HF beam was tilted between 0 and 21° south of vertical. Text EISCAT Tromsø Copernicus Publications: E-Journals Norway Tromsø Annales Geophysicae 24 7 1819 1827 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
A high frequency (HF) ionospheric modification experiment was carried out between 25 September and 8 October 2004, using the EISCAT HF transmitter located near Tromsø, Norway. During this experiment the spectra of the stimulated HF sideband waves (stimulated electromagnetic emission or SEE) induced by the HF pump were observed using an interferometer consisting of three spaced receiving antennas with baselines both along and perpendicular to the meridian, and a multi-channel coherent receiver, installed in the vicinity of the HF facility. The transmitter operated at 4040kHz and its antenna beam was scanned to angles of 0°, 7°, 14°, and 21° south from vertical, pausing 4min at each position. This paper focuses on features of the downshifted peak (DP) emission, which has not been as thoroughly studied as many of the other SEE spectral features observable within the EISCAT pump frequency range. It was found that the signal-weighted direction of the DP source region remained within 5° of magnetic zenith as the HF beam was tilted between 0 and 21° south of vertical. |
format |
Text |
author |
Tereshchenko, E. D. Yurik, R. Yu. Khudukon, B. Z. Rietveld, M. T. Isham, B. Belyey, V. Brekke, A. Hagfors, T. Grill, M. |
spellingShingle |
Tereshchenko, E. D. Yurik, R. Yu. Khudukon, B. Z. Rietveld, M. T. Isham, B. Belyey, V. Brekke, A. Hagfors, T. Grill, M. Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer |
author_facet |
Tereshchenko, E. D. Yurik, R. Yu. Khudukon, B. Z. Rietveld, M. T. Isham, B. Belyey, V. Brekke, A. Hagfors, T. Grill, M. |
author_sort |
Tereshchenko, E. D. |
title |
Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer |
title_short |
Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer |
title_full |
Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer |
title_fullStr |
Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer |
title_full_unstemmed |
Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer |
title_sort |
directional features of the downshifted peak observed in hf-induced stimulated electromagnetic emission spectra obtained using an interferometer |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-24-1819-2006 https://angeo.copernicus.org/articles/24/1819/2006/ |
geographic |
Norway Tromsø |
geographic_facet |
Norway Tromsø |
genre |
EISCAT Tromsø |
genre_facet |
EISCAT Tromsø |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-24-1819-2006 https://angeo.copernicus.org/articles/24/1819/2006/ |
op_doi |
https://doi.org/10.5194/angeo-24-1819-2006 |
container_title |
Annales Geophysicae |
container_volume |
24 |
container_issue |
7 |
container_start_page |
1819 |
op_container_end_page |
1827 |
_version_ |
1766400115700924416 |