Mesoscale ionospheric plasma irregularities and scintillation over Svalbard
This thesis investigates how navigation signals are compromised by ionospheric plasma irregularities in the auroral and polar ionosphere over Svalbard. In 2013, four multiconstellation global navigation satellite system (GNSS) receivers were installed in NyÅlesund, Longyearbyen, Hopen, and Bjørnøya....
Published in: | Journal of Geophysical Research: Space Physics |
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Main Author: | |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
The University of Bergen
2016
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Subjects: | |
Online Access: | https://hdl.handle.net/1956/12991 |
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ftunivbergen:oai:bora.uib.no:1956/12991 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 van der Meeren, Christer Mesoscale ionospheric plasma irregularities and scintillation over Svalbard |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 |
description |
This thesis investigates how navigation signals are compromised by ionospheric plasma irregularities in the auroral and polar ionosphere over Svalbard. In 2013, four multiconstellation global navigation satellite system (GNSS) receivers were installed in NyÅlesund, Longyearbyen, Hopen, and Bjørnøya. These receivers provide unprecedented coverage of scintillation and plasma density (total electron content) in the region. The four research papers in this thesis are detailed case studies investigating mesoscale irregularities and scintillation.We use data from these GNSS receivers, all-sky imagers, coherent and incoherent scatter radars, ionosondes, and in-situ satellite measurements. Paper I [van der Meeren et al., 2014] investigates scintillation and irregularities on the front of a tongue of ionization (TOI) in the polar cap. Moderate scintillation and structuring is observed on the leading edge of the TOI. We employ a novel method where we use spectrograms of the phase of raw GNSS signals to show that the structuring is real and not due to erroneous data detrending of the σφ phase scintillation index. Paper II [Oksavik et al., 2015] investigates irregularities in the dayside auroral region, specifically in relation to poleward-moving auroral forms (PMAFs). Scintillation is strongly localized to these intense and transient features, even in the presence of polar cap patches. Paper III [van der Meeren et al., 2015] investigates scintillation from substorm auroral emissions as polar cap patches enter the nightside auroral oval. The most severe scintillation is found when the auroral precipitation coincides with polar cap patches. The scintillation is strongly localized to signals intersecting intense auroral emissions. Paper IV [van der Meeren et al., 2016] investigates irregularities during quiet geomagnetic conditions. We find weak irregularities in relation to a stable and intense transpolar arc, but no scintillation is seen. The main results in this thesis are: Scintillation-producing irregularities can exist ... |
format |
Doctoral or Postdoctoral Thesis |
author |
van der Meeren, Christer |
author_facet |
van der Meeren, Christer |
author_sort |
van der Meeren, Christer |
title |
Mesoscale ionospheric plasma irregularities and scintillation over Svalbard |
title_short |
Mesoscale ionospheric plasma irregularities and scintillation over Svalbard |
title_full |
Mesoscale ionospheric plasma irregularities and scintillation over Svalbard |
title_fullStr |
Mesoscale ionospheric plasma irregularities and scintillation over Svalbard |
title_full_unstemmed |
Mesoscale ionospheric plasma irregularities and scintillation over Svalbard |
title_sort |
mesoscale ionospheric plasma irregularities and scintillation over svalbard |
publisher |
The University of Bergen |
publishDate |
2016 |
url |
https://hdl.handle.net/1956/12991 |
long_lat |
ENVELOPE(-67.250,-67.250,-68.151,-68.151) ENVELOPE(9.279,9.279,63.379,63.379) |
geographic |
Bjørnøya Hopen Longyearbyen Svalbard |
geographic_facet |
Bjørnøya Hopen Longyearbyen Svalbard |
genre |
Bjørnøya Hopen Longyearbyen Svalbard Hopen |
genre_facet |
Bjørnøya Hopen Longyearbyen Svalbard Hopen |
op_relation |
Paper I: van der Meeren, C., K. Oksavik, D. Lorentzen, J. I. Moen, and V. Romano, GPS scintillation and irregularities at the front of an ionization tongue in the nightside polar ionosphere, Journal of Geophysical Research: Space Physics, 119(10), 8624–8636, doi:10.1002/2014JA020114, 2014. The article is available at: http://hdl.handle.net/1956/9681 Paper II: Oksavik, K., C. van der Meeren, D. A. Lorentzen, L. J. Baddeley, and J. Moen, Scintillation and loss of signal lock from poleward moving auroral forms in the cusp ionosphere, Journal of Geophysical Research: Space Physics, 120(10), doi:10.1002/2015JA021528, 2015. The article is available at: http://hdl.handle.net/1956/11844 Paper III: van der Meeren, C., K. Oksavik, D. A. Lorentzen, M. T. Rietveld, and L. B. N. Clausen, Severe and localized GNSS scintillation at the poleward edge of the nightside auroral oval during intense substorm aurora, Journal of Geophysical Research: Space Physics, 120(12), doi:10.1002/2015JA021819, 2015. The article is available at: http://hdl.handle.net/1956/12989 Paper IV: van der Meeren, C., K. Oksavik, D. A. Lorentzen, L. J. Paxton, and L. B. N. Clausen, Scintillation and irregularities from the nightside part of a sun-aligned polar cap arc, Journal of Geophysical Research: Space Physics, 121, doi:10.1002/2016JA022708, 2016. The article is available at: http://hdl.handle.net/1956/12990 https://hdl.handle.net/1956/12991 cristin:1390983 |
op_rights |
Copyright the author. All rights reserved |
op_doi |
https://doi.org/10.1002/2014JA02011410.1002/2015JA02152810.1002/2015JA02181910.1002/2016JA022708 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
119 |
container_issue |
10 |
container_start_page |
8624 |
op_container_end_page |
8636 |
_version_ |
1766379205309759488 |
spelling |
ftunivbergen:oai:bora.uib.no:1956/12991 2023-05-15T15:44:50+02:00 Mesoscale ionospheric plasma irregularities and scintillation over Svalbard van der Meeren, Christer 2016-10-21 application/pdf https://hdl.handle.net/1956/12991 eng eng The University of Bergen Paper I: van der Meeren, C., K. Oksavik, D. Lorentzen, J. I. Moen, and V. Romano, GPS scintillation and irregularities at the front of an ionization tongue in the nightside polar ionosphere, Journal of Geophysical Research: Space Physics, 119(10), 8624–8636, doi:10.1002/2014JA020114, 2014. The article is available at: http://hdl.handle.net/1956/9681 Paper II: Oksavik, K., C. van der Meeren, D. A. Lorentzen, L. J. Baddeley, and J. Moen, Scintillation and loss of signal lock from poleward moving auroral forms in the cusp ionosphere, Journal of Geophysical Research: Space Physics, 120(10), doi:10.1002/2015JA021528, 2015. The article is available at: http://hdl.handle.net/1956/11844 Paper III: van der Meeren, C., K. Oksavik, D. A. Lorentzen, M. T. Rietveld, and L. B. N. Clausen, Severe and localized GNSS scintillation at the poleward edge of the nightside auroral oval during intense substorm aurora, Journal of Geophysical Research: Space Physics, 120(12), doi:10.1002/2015JA021819, 2015. The article is available at: http://hdl.handle.net/1956/12989 Paper IV: van der Meeren, C., K. Oksavik, D. A. Lorentzen, L. J. Paxton, and L. B. N. Clausen, Scintillation and irregularities from the nightside part of a sun-aligned polar cap arc, Journal of Geophysical Research: Space Physics, 121, doi:10.1002/2016JA022708, 2016. The article is available at: http://hdl.handle.net/1956/12990 https://hdl.handle.net/1956/12991 cristin:1390983 Copyright the author. All rights reserved VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 Doctoral thesis 2016 ftunivbergen https://doi.org/10.1002/2014JA02011410.1002/2015JA02152810.1002/2015JA02181910.1002/2016JA022708 2023-03-14T17:38:55Z This thesis investigates how navigation signals are compromised by ionospheric plasma irregularities in the auroral and polar ionosphere over Svalbard. In 2013, four multiconstellation global navigation satellite system (GNSS) receivers were installed in NyÅlesund, Longyearbyen, Hopen, and Bjørnøya. These receivers provide unprecedented coverage of scintillation and plasma density (total electron content) in the region. The four research papers in this thesis are detailed case studies investigating mesoscale irregularities and scintillation.We use data from these GNSS receivers, all-sky imagers, coherent and incoherent scatter radars, ionosondes, and in-situ satellite measurements. Paper I [van der Meeren et al., 2014] investigates scintillation and irregularities on the front of a tongue of ionization (TOI) in the polar cap. Moderate scintillation and structuring is observed on the leading edge of the TOI. We employ a novel method where we use spectrograms of the phase of raw GNSS signals to show that the structuring is real and not due to erroneous data detrending of the σφ phase scintillation index. Paper II [Oksavik et al., 2015] investigates irregularities in the dayside auroral region, specifically in relation to poleward-moving auroral forms (PMAFs). Scintillation is strongly localized to these intense and transient features, even in the presence of polar cap patches. Paper III [van der Meeren et al., 2015] investigates scintillation from substorm auroral emissions as polar cap patches enter the nightside auroral oval. The most severe scintillation is found when the auroral precipitation coincides with polar cap patches. The scintillation is strongly localized to signals intersecting intense auroral emissions. Paper IV [van der Meeren et al., 2016] investigates irregularities during quiet geomagnetic conditions. We find weak irregularities in relation to a stable and intense transpolar arc, but no scintillation is seen. The main results in this thesis are: Scintillation-producing irregularities can exist ... Doctoral or Postdoctoral Thesis Bjørnøya Hopen Longyearbyen Svalbard Hopen University of Bergen: Bergen Open Research Archive (BORA-UiB) Bjørnøya ENVELOPE(-67.250,-67.250,-68.151,-68.151) Hopen ENVELOPE(9.279,9.279,63.379,63.379) Longyearbyen Svalbard Journal of Geophysical Research: Space Physics 119 10 8624 8636 |