Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations
In the autumn of the year 2000, four radio receivers capable of tracking various beacon satellites were set up along the southwestern coast of Greenland. They are used to reconstruct images of the ionospheric plasma density distribution via the tomographic method. In order to test and validate tomog...
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ftingv:oai:www.earth-prints.org:2122/656 2024-06-09T07:46:24+00:00 Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations Watermann, J. Bust, G. S. Thayer, J. P. Neubert, T. Coker, C. Watermann, J.; Danish Meteorological Institute, Copenhagen, Denmark Bust, G. S.; Applied Research Laboratories, The University of Texas at Austin, TX, U.S.A. Thayer, J. P.; SRI International, Menlo Park, CA, U.S.A. Neubert, T.; Danish Space Research Institute, Copenhagen, Denmark Coker, C.; Applied Research Laboratories, The University of Texas at Austin, TX, U.S.A. Danish Meteorological Institute, Copenhagen, Denmark Applied Research Laboratories, The University of Texas at Austin, TX, U.S.A. SRI International, Menlo Park, CA, U.S.A. Danish Space Research Institute, Copenhagen, Denmark 2002 379804 bytes application/pdf http://hdl.handle.net/2122/656 en eng INGV Annals of Geophysics 1/45 (2002) http://hdl.handle.net/2122/656 open Beacon satellites ionospheric plasma 01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics 01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation 01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques article 2002 ftingv 2024-05-15T08:04:29Z In the autumn of the year 2000, four radio receivers capable of tracking various beacon satellites were set up along the southwestern coast of Greenland. They are used to reconstruct images of the ionospheric plasma density distribution via the tomographic method. In order to test and validate tomographic imaging under the highly variable conditions often prevailing in the high-latitude ionosphere, a time interval was selected when the Sondrestrom incoherent scatter radar conducted measurements of the ionospheric plasma density while the radio receivers tracked a number of beacon satellites. A comparison between two-dimensional images of the plasma density distribution obtained from the radar and the satellite receivers revealed generally good agreement between radar measurements and tomographic images. Observed discrepancies can be attributed to F region plasma patches moving through the field of view with a speed of several hundred meters per second, thereby smearing out the tomographic image. A notable mismatch occurred around local magnetic midnight when a magnetospheric substorm breakup occurred in the vicinity of southwest Greenland (identified from ground-based magnetometer observations). The breakup was associated with a sudden intensification of the westward auroral electrojet which was centered at about 69 and extended up to some 73 corrected geomagnetic latitude. Ground-based magnetometer data may thus have the potential of indicating when the tomographic method is at risk and may fail. We finally outline the application of tomographic imaging, when combined with magnetic field data, to estimate ionospheric Joule heating rates. Published JCR Journal open Article in Journal/Newspaper Greenland Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Greenland |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
topic |
Beacon satellites ionospheric plasma 01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics 01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation 01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques |
spellingShingle |
Beacon satellites ionospheric plasma 01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics 01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation 01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques Watermann, J. Bust, G. S. Thayer, J. P. Neubert, T. Coker, C. Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations |
topic_facet |
Beacon satellites ionospheric plasma 01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics 01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation 01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques |
description |
In the autumn of the year 2000, four radio receivers capable of tracking various beacon satellites were set up along the southwestern coast of Greenland. They are used to reconstruct images of the ionospheric plasma density distribution via the tomographic method. In order to test and validate tomographic imaging under the highly variable conditions often prevailing in the high-latitude ionosphere, a time interval was selected when the Sondrestrom incoherent scatter radar conducted measurements of the ionospheric plasma density while the radio receivers tracked a number of beacon satellites. A comparison between two-dimensional images of the plasma density distribution obtained from the radar and the satellite receivers revealed generally good agreement between radar measurements and tomographic images. Observed discrepancies can be attributed to F region plasma patches moving through the field of view with a speed of several hundred meters per second, thereby smearing out the tomographic image. A notable mismatch occurred around local magnetic midnight when a magnetospheric substorm breakup occurred in the vicinity of southwest Greenland (identified from ground-based magnetometer observations). The breakup was associated with a sudden intensification of the westward auroral electrojet which was centered at about 69 and extended up to some 73 corrected geomagnetic latitude. Ground-based magnetometer data may thus have the potential of indicating when the tomographic method is at risk and may fail. We finally outline the application of tomographic imaging, when combined with magnetic field data, to estimate ionospheric Joule heating rates. Published JCR Journal open |
author2 |
Watermann, J.; Danish Meteorological Institute, Copenhagen, Denmark Bust, G. S.; Applied Research Laboratories, The University of Texas at Austin, TX, U.S.A. Thayer, J. P.; SRI International, Menlo Park, CA, U.S.A. Neubert, T.; Danish Space Research Institute, Copenhagen, Denmark Coker, C.; Applied Research Laboratories, The University of Texas at Austin, TX, U.S.A. Danish Meteorological Institute, Copenhagen, Denmark Applied Research Laboratories, The University of Texas at Austin, TX, U.S.A. SRI International, Menlo Park, CA, U.S.A. Danish Space Research Institute, Copenhagen, Denmark |
format |
Article in Journal/Newspaper |
author |
Watermann, J. Bust, G. S. Thayer, J. P. Neubert, T. Coker, C. |
author_facet |
Watermann, J. Bust, G. S. Thayer, J. P. Neubert, T. Coker, C. |
author_sort |
Watermann, J. |
title |
Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations |
title_short |
Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations |
title_full |
Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations |
title_fullStr |
Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations |
title_full_unstemmed |
Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations |
title_sort |
mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations |
publisher |
INGV |
publishDate |
2002 |
url |
http://hdl.handle.net/2122/656 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
Annals of Geophysics 1/45 (2002) http://hdl.handle.net/2122/656 |
op_rights |
open |
_version_ |
1801376233416556544 |