Survey of ULF wave signatures seen in the Tasman International Geospace Environment Radars data
Ultralow frequency (ULF) plasma waves propagate through the magnetosphere and ionosphere where they can alter the Doppler velocity of HF radar echoes. Data from the two Tasman International Geospace Environment Radars and the fluxgate and induction coil magnetometers located on Macquarie Island (54....
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ftunivnewcastnsw:uon:27644 2023-05-15T17:09:58+02:00 Survey of ULF wave signatures seen in the Tasman International Geospace Environment Radars data Norouzi-Sedeh, L. Waters, C. L. Menk, F. W. The University of Newcastle. Faculty of Science , School of Mathematical and Physical Sciences 2015 http://hdl.handle.net/1959.13/1336552 eng eng Wiley-Blackwell ARC.LP130100709 http://purl.org/au-research/grants/arc/LP130100709 Journal of Geophysical Research: Space Physics Vol. 120, Issue 2, p. 949-963 10.1002/2014JA020652 Accepted for publication in Geophysical Research Letters. Copyright (2015) American Geophysical Union. Further reproduction or electronic distribution is not permitted. ULF wave signatures Tasman International Geospace Environment Radars radar data ultralow frequency plasa waves journal article 2015 ftunivnewcastnsw 2018-07-27T00:29:03Z Ultralow frequency (ULF) plasma waves propagate through the magnetosphere and ionosphere where they can alter the Doppler velocity of HF radar echoes. Data from the two Tasman International Geospace Environment Radars and the fluxgate and induction coil magnetometers located on Macquarie Island (54.5°S, 158.95°E geographic) over 2006-2009 show that ULF wave signatures are common. Using coincident radar and magnetometer data selection criteria, 194 events representing a total of 233.4 h were identified. The majority of ULF signatures seen in the radar data were detected between 06 and 12 UT (15 and 21 LT). Using the Maximum Entropy Method, the spectral content showed favored frequencies of 1.6, 2.1, 2.9, and 3.3 mHz but no obvious variation of frequency with latitude. Most of the observed frequencies were in the range 1-4 mHz. A class of Doppler velocity signatures that appeared as a zigzag shape in the radar range:time plots were identified and may be related to the expected plasmapause latitudes. Regularly spaced, favored frequencies appeared in the ground magnetometer data during the afternoon, night, and morning sectors for those days where ULF wave events were observed in the radar data. Article in Journal/Newspaper Macquarie Island NOVA: The University of Newcastle Research Online (Australia) |
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Open Polar |
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NOVA: The University of Newcastle Research Online (Australia) |
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ftunivnewcastnsw |
language |
English |
topic |
ULF wave signatures Tasman International Geospace Environment Radars radar data ultralow frequency plasa waves |
spellingShingle |
ULF wave signatures Tasman International Geospace Environment Radars radar data ultralow frequency plasa waves Norouzi-Sedeh, L. Waters, C. L. Menk, F. W. Survey of ULF wave signatures seen in the Tasman International Geospace Environment Radars data |
topic_facet |
ULF wave signatures Tasman International Geospace Environment Radars radar data ultralow frequency plasa waves |
description |
Ultralow frequency (ULF) plasma waves propagate through the magnetosphere and ionosphere where they can alter the Doppler velocity of HF radar echoes. Data from the two Tasman International Geospace Environment Radars and the fluxgate and induction coil magnetometers located on Macquarie Island (54.5°S, 158.95°E geographic) over 2006-2009 show that ULF wave signatures are common. Using coincident radar and magnetometer data selection criteria, 194 events representing a total of 233.4 h were identified. The majority of ULF signatures seen in the radar data were detected between 06 and 12 UT (15 and 21 LT). Using the Maximum Entropy Method, the spectral content showed favored frequencies of 1.6, 2.1, 2.9, and 3.3 mHz but no obvious variation of frequency with latitude. Most of the observed frequencies were in the range 1-4 mHz. A class of Doppler velocity signatures that appeared as a zigzag shape in the radar range:time plots were identified and may be related to the expected plasmapause latitudes. Regularly spaced, favored frequencies appeared in the ground magnetometer data during the afternoon, night, and morning sectors for those days where ULF wave events were observed in the radar data. |
author2 |
The University of Newcastle. Faculty of Science , School of Mathematical and Physical Sciences |
format |
Article in Journal/Newspaper |
author |
Norouzi-Sedeh, L. Waters, C. L. Menk, F. W. |
author_facet |
Norouzi-Sedeh, L. Waters, C. L. Menk, F. W. |
author_sort |
Norouzi-Sedeh, L. |
title |
Survey of ULF wave signatures seen in the Tasman International Geospace Environment Radars data |
title_short |
Survey of ULF wave signatures seen in the Tasman International Geospace Environment Radars data |
title_full |
Survey of ULF wave signatures seen in the Tasman International Geospace Environment Radars data |
title_fullStr |
Survey of ULF wave signatures seen in the Tasman International Geospace Environment Radars data |
title_full_unstemmed |
Survey of ULF wave signatures seen in the Tasman International Geospace Environment Radars data |
title_sort |
survey of ulf wave signatures seen in the tasman international geospace environment radars data |
publisher |
Wiley-Blackwell |
publishDate |
2015 |
url |
http://hdl.handle.net/1959.13/1336552 |
genre |
Macquarie Island |
genre_facet |
Macquarie Island |
op_relation |
ARC.LP130100709 http://purl.org/au-research/grants/arc/LP130100709 Journal of Geophysical Research: Space Physics Vol. 120, Issue 2, p. 949-963 10.1002/2014JA020652 |
op_rights |
Accepted for publication in Geophysical Research Letters. Copyright (2015) American Geophysical Union. Further reproduction or electronic distribution is not permitted. |
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1766066346302373888 |