A study of polar cap Pc1-2: source locations and wave propagation
The occurrence of Pcl-2 ULF waves in Scott Base and Casey Antarctic magnetometer data has been examined with the objective of determining whether the source region for these waves is located in the Earth's cusp/boundary layer region or the magnetosheath. In particular we explore the hypothesis...
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National Space Society of Australia
2010
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ftunivnewcastnsw:uon:12033 2023-05-15T13:54:38+02:00 A study of polar cap Pc1-2: source locations and wave propagation Ables, Sean Sciffer, Murray Fraser, Brian Morley, Steven The University of Newcastle. Faculty of Science & Information Technology, School of Mathematical and Physical Sciences 2010 http://hdl.handle.net/1959.13/935310 eng eng National Space Society of Australia 9th Australian Space Science Conference (ASSC 2010). Proceedings of the 9th Australian Space Science Conference (Sydney 28-30 Spetember, 2010) p. 105-114 http://www.nssa.com.au/ocs/index.php?cf=11 magnetosphere ULF waves geomagnetic mapping Antarctica conference paper 2010 ftunivnewcastnsw 2018-07-27T00:44:08Z The occurrence of Pcl-2 ULF waves in Scott Base and Casey Antarctic magnetometer data has been examined with the objective of determining whether the source region for these waves is located in the Earth's cusp/boundary layer region or the magnetosheath. In particular we explore the hypothesis that some Pcl-2 events are propagated along open field lines which convect over the southern polar cap. For a selected event the location of Scott Base with respect to the open/closed field line boundary was independently determined using DMSP spacecraft particle data and well established particle energy and flux criteria. This event provides evidence that Pcl-2 waves can be seen on the ground well inside the polar cap. The possibility of propagation in the ionospheric waveguide, away from the footpoint of the source, is investigated using numerical modelling and realistic ionospheric parameters. Under the modelled conditions we find a modification of wave ellipticity which excludes this explanation for the polar cap Pcl-2 seen in the event study. Conference Object Antarc* Antarctic Antarctica NOVA: The University of Newcastle Research Online (Australia) Antarctic Scott Base ENVELOPE(166.766,166.766,-77.849,-77.849) |
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Open Polar |
collection |
NOVA: The University of Newcastle Research Online (Australia) |
op_collection_id |
ftunivnewcastnsw |
language |
English |
topic |
magnetosphere ULF waves geomagnetic mapping Antarctica |
spellingShingle |
magnetosphere ULF waves geomagnetic mapping Antarctica Ables, Sean Sciffer, Murray Fraser, Brian Morley, Steven A study of polar cap Pc1-2: source locations and wave propagation |
topic_facet |
magnetosphere ULF waves geomagnetic mapping Antarctica |
description |
The occurrence of Pcl-2 ULF waves in Scott Base and Casey Antarctic magnetometer data has been examined with the objective of determining whether the source region for these waves is located in the Earth's cusp/boundary layer region or the magnetosheath. In particular we explore the hypothesis that some Pcl-2 events are propagated along open field lines which convect over the southern polar cap. For a selected event the location of Scott Base with respect to the open/closed field line boundary was independently determined using DMSP spacecraft particle data and well established particle energy and flux criteria. This event provides evidence that Pcl-2 waves can be seen on the ground well inside the polar cap. The possibility of propagation in the ionospheric waveguide, away from the footpoint of the source, is investigated using numerical modelling and realistic ionospheric parameters. Under the modelled conditions we find a modification of wave ellipticity which excludes this explanation for the polar cap Pcl-2 seen in the event study. |
author2 |
The University of Newcastle. Faculty of Science & Information Technology, School of Mathematical and Physical Sciences |
format |
Conference Object |
author |
Ables, Sean Sciffer, Murray Fraser, Brian Morley, Steven |
author_facet |
Ables, Sean Sciffer, Murray Fraser, Brian Morley, Steven |
author_sort |
Ables, Sean |
title |
A study of polar cap Pc1-2: source locations and wave propagation |
title_short |
A study of polar cap Pc1-2: source locations and wave propagation |
title_full |
A study of polar cap Pc1-2: source locations and wave propagation |
title_fullStr |
A study of polar cap Pc1-2: source locations and wave propagation |
title_full_unstemmed |
A study of polar cap Pc1-2: source locations and wave propagation |
title_sort |
study of polar cap pc1-2: source locations and wave propagation |
publisher |
National Space Society of Australia |
publishDate |
2010 |
url |
http://hdl.handle.net/1959.13/935310 |
long_lat |
ENVELOPE(166.766,166.766,-77.849,-77.849) |
geographic |
Antarctic Scott Base |
geographic_facet |
Antarctic Scott Base |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
9th Australian Space Science Conference (ASSC 2010). Proceedings of the 9th Australian Space Science Conference (Sydney 28-30 Spetember, 2010) p. 105-114 http://www.nssa.com.au/ocs/index.php?cf=11 |
_version_ |
1766260702122606592 |