The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017
Different indices have been used to reflect, or monitor the ionospheric scintillation, e.g. the detrended carrier phase, σ φ , S 4 , the rate of change of the vertical total electron content index ( v ROTI), as well as the ionosphere‐free linear combination (IFLC) of two carrier phases. However, few...
Published in: | Journal of Space Weather and Space Climate |
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Online Access: | http://hdl.handle.net/10852/99018 https://doi.org/10.1051/swsc/2022036 |
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ftoslouniv:oai:www.duo.uio.no:10852/99018 2023-05-15T18:29:52+02:00 The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017 ENEngelskEnglishThe refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017 Zheng, Yuhao Xiong, Chao Jin, Yaqi Liu, Dun Oksavik, Kjellmar Xu, Chunyu Zhu, Yixun Gao, Shunzu Wang, Fengjue Wang, Hui Yin, Fan 2023-01-13T13:00:29Z http://hdl.handle.net/10852/99018 https://doi.org/10.1051/swsc/2022036 EN eng EDP Sciences Zheng, Yuhao Xiong, Chao Jin, Yaqi Liu, Dun Oksavik, Kjellmar Xu, Chunyu Zhu, Yixun Gao, Shunzu Wang, Fengjue Wang, Hui Yin, Fan . The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017. Journal of Space Weather and Space Climate. 2022, 12(4) http://hdl.handle.net/10852/99018 2106553 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Space Weather and Space Climate&rft.volume=12&rft.spage=&rft.date=2022 Journal of Space Weather and Space Climate 12 4 0 https://doi.org/10.1051/swsc/2022036 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 2115-7251 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2023 ftoslouniv https://doi.org/10.1051/swsc/2022036 2023-01-25T23:36:27Z Different indices have been used to reflect, or monitor the ionospheric scintillation, e.g. the detrended carrier phase, σ φ , S 4 , the rate of change of the vertical total electron content index ( v ROTI), as well as the ionosphere‐free linear combination (IFLC) of two carrier phases. However, few studies have been performed to investigate the refractive and diffractive contributions to these indices, especially during geomagnetic storms. In this study, we analyze the high-resolution (50 Hz) phase and amplitude measurements from four high-latitude stations in Svalbard, Norway during the geomagnetic storm on 7–8 September 2017. Our results show that at high latitudes, the high-pass filter with a standard cutoff frequency of 0.1 Hz sometimes cannot effectively remove the refraction-driven phase variations, especially during the geomagnetic storm, leading to a remaining refraction contribution to the detrended carrier phase and σ φ when scintillation happens. In the meanwhile, as v ROTI is sensitive to the TEC gradients, regardless of small- or large-scale ionospheric structures, both refraction and diffraction effects can cause visible fluctuations of v ROTI. For most of the scintillation events, the phase indices (including detrended carrier phase, σ φ , and v ROTI), IFLC , and S 4 show consistent fluctuations, indicating that diffraction usually occurs simultaneously with refraction during scintillation. One interesting feature is that although the IFLC and S 4 are thought to be both related to the diffraction effect, they do not always show simultaneous correspondence during scintillations. The IFLC is enhanced during the geomagnetic storm, while such a feature is not seen in S 4 . We suggest that the enhanced IFLC during the geomagnetic storm is caused by the increased high-frequency phase power, which should be related to the enhanced density of small-scale irregularities during storm periods. Article in Journal/Newspaper Svalbard Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Norway Svalbard Journal of Space Weather and Space Climate 12 40 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Different indices have been used to reflect, or monitor the ionospheric scintillation, e.g. the detrended carrier phase, σ φ , S 4 , the rate of change of the vertical total electron content index ( v ROTI), as well as the ionosphere‐free linear combination (IFLC) of two carrier phases. However, few studies have been performed to investigate the refractive and diffractive contributions to these indices, especially during geomagnetic storms. In this study, we analyze the high-resolution (50 Hz) phase and amplitude measurements from four high-latitude stations in Svalbard, Norway during the geomagnetic storm on 7–8 September 2017. Our results show that at high latitudes, the high-pass filter with a standard cutoff frequency of 0.1 Hz sometimes cannot effectively remove the refraction-driven phase variations, especially during the geomagnetic storm, leading to a remaining refraction contribution to the detrended carrier phase and σ φ when scintillation happens. In the meanwhile, as v ROTI is sensitive to the TEC gradients, regardless of small- or large-scale ionospheric structures, both refraction and diffraction effects can cause visible fluctuations of v ROTI. For most of the scintillation events, the phase indices (including detrended carrier phase, σ φ , and v ROTI), IFLC , and S 4 show consistent fluctuations, indicating that diffraction usually occurs simultaneously with refraction during scintillation. One interesting feature is that although the IFLC and S 4 are thought to be both related to the diffraction effect, they do not always show simultaneous correspondence during scintillations. The IFLC is enhanced during the geomagnetic storm, while such a feature is not seen in S 4 . We suggest that the enhanced IFLC during the geomagnetic storm is caused by the increased high-frequency phase power, which should be related to the enhanced density of small-scale irregularities during storm periods. |
format |
Article in Journal/Newspaper |
author |
Zheng, Yuhao Xiong, Chao Jin, Yaqi Liu, Dun Oksavik, Kjellmar Xu, Chunyu Zhu, Yixun Gao, Shunzu Wang, Fengjue Wang, Hui Yin, Fan |
spellingShingle |
Zheng, Yuhao Xiong, Chao Jin, Yaqi Liu, Dun Oksavik, Kjellmar Xu, Chunyu Zhu, Yixun Gao, Shunzu Wang, Fengjue Wang, Hui Yin, Fan The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017 |
author_facet |
Zheng, Yuhao Xiong, Chao Jin, Yaqi Liu, Dun Oksavik, Kjellmar Xu, Chunyu Zhu, Yixun Gao, Shunzu Wang, Fengjue Wang, Hui Yin, Fan |
author_sort |
Zheng, Yuhao |
title |
The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017 |
title_short |
The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017 |
title_full |
The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017 |
title_fullStr |
The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017 |
title_full_unstemmed |
The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017 |
title_sort |
refractive and diffractive contributions to gps signal scintillation at high latitudes during the geomagnetic storm on 7-8 september 2017 |
publisher |
EDP Sciences |
publishDate |
2023 |
url |
http://hdl.handle.net/10852/99018 https://doi.org/10.1051/swsc/2022036 |
geographic |
Norway Svalbard |
geographic_facet |
Norway Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
2115-7251 |
op_relation |
Zheng, Yuhao Xiong, Chao Jin, Yaqi Liu, Dun Oksavik, Kjellmar Xu, Chunyu Zhu, Yixun Gao, Shunzu Wang, Fengjue Wang, Hui Yin, Fan . The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017. Journal of Space Weather and Space Climate. 2022, 12(4) http://hdl.handle.net/10852/99018 2106553 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Space Weather and Space Climate&rft.volume=12&rft.spage=&rft.date=2022 Journal of Space Weather and Space Climate 12 4 0 https://doi.org/10.1051/swsc/2022036 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1051/swsc/2022036 |
container_title |
Journal of Space Weather and Space Climate |
container_volume |
12 |
container_start_page |
40 |
_version_ |
1766213284042637312 |