Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars
We performed a statistical analysis of the occurrence distribution of Doppler spectral width around the day-side high-latitude ionosphere using data from the conjugate radar pair composed of the CUTLASS Iceland-East radar in the Northern Hemisphere and the SENSU Syowa-East radar in the Southern Hemi...
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ftdoajarticles:oai:doaj.org/article:656fa13b26fc4d3287c3f5a282428f3f 2023-05-15T16:48:48+02:00 Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars K. Hosokawa E. E. Woodfield M. Lester S. E. Milan N. Sato A. S. Yukimatu T. Iyemori 2002-08-01T00:00:00Z https://doi.org/10.5194/angeo-20-1213-2002 https://doaj.org/article/656fa13b26fc4d3287c3f5a282428f3f EN eng Copernicus Publications https://www.ann-geophys.net/20/1213/2002/angeo-20-1213-2002.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-20-1213-2002 0992-7689 1432-0576 https://doaj.org/article/656fa13b26fc4d3287c3f5a282428f3f Annales Geophysicae, Vol 20, Pp 1213-1223 (2002) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2002 ftdoajarticles https://doi.org/10.5194/angeo-20-1213-2002 2022-12-31T14:40:19Z We performed a statistical analysis of the occurrence distribution of Doppler spectral width around the day-side high-latitude ionosphere using data from the conjugate radar pair composed of the CUTLASS Iceland-East radar in the Northern Hemisphere and the SENSU Syowa-East radar in the Southern Hemisphere. Three types of spectral width distribution were identified: (1) an exponential-like distribution in the lower magnetic latitudes (below 72°), (2) a Gaussian-like distribution around a few degrees magnetic latitude, centered on 78°, and (3) another type of distribution in the higher magnetic latitudes (above 80°). The first two are considered to represent the geophysical regimes such as the LLBL and the cusp, respectively, because they are similar to the spectral width distributions within the LLBL and the cusp, as classified by Baker et al. (1995). The distribution found above 80° magnetic latitude has been clarified for the first time in this study. This distribution has similarities to the exponential-like distribution in the lower latitude part, although clear differences also exist in their characteristics. These three spectral width distributions are commonly identified in conjugate hemispheres. The latitudinal transition from one distribution to another exhibits basically the same trend between two hemispheres. There is, however, an interhemispheric difference in the form of the distribution around the cusp latitudes, such that spectral width values obtained from Syowa-East are larger than those from Iceland-East. On the basis of the spectral width characteristics, the average locations of the cusp and the open/closed field line boundary are estimated statistically. Key words. Ionosphere (ionosphere-magnetosphere inter-actions; plasma convection) – Magnetospheric physics (magnetopause, cusp, and boundary layers) Article in Journal/Newspaper Iceland Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 20 8 1213 1223 |
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Directory of Open Access Journals: DOAJ Articles |
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Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
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Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 K. Hosokawa E. E. Woodfield M. Lester S. E. Milan N. Sato A. S. Yukimatu T. Iyemori Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
We performed a statistical analysis of the occurrence distribution of Doppler spectral width around the day-side high-latitude ionosphere using data from the conjugate radar pair composed of the CUTLASS Iceland-East radar in the Northern Hemisphere and the SENSU Syowa-East radar in the Southern Hemisphere. Three types of spectral width distribution were identified: (1) an exponential-like distribution in the lower magnetic latitudes (below 72°), (2) a Gaussian-like distribution around a few degrees magnetic latitude, centered on 78°, and (3) another type of distribution in the higher magnetic latitudes (above 80°). The first two are considered to represent the geophysical regimes such as the LLBL and the cusp, respectively, because they are similar to the spectral width distributions within the LLBL and the cusp, as classified by Baker et al. (1995). The distribution found above 80° magnetic latitude has been clarified for the first time in this study. This distribution has similarities to the exponential-like distribution in the lower latitude part, although clear differences also exist in their characteristics. These three spectral width distributions are commonly identified in conjugate hemispheres. The latitudinal transition from one distribution to another exhibits basically the same trend between two hemispheres. There is, however, an interhemispheric difference in the form of the distribution around the cusp latitudes, such that spectral width values obtained from Syowa-East are larger than those from Iceland-East. On the basis of the spectral width characteristics, the average locations of the cusp and the open/closed field line boundary are estimated statistically. Key words. Ionosphere (ionosphere-magnetosphere inter-actions; plasma convection) – Magnetospheric physics (magnetopause, cusp, and boundary layers) |
format |
Article in Journal/Newspaper |
author |
K. Hosokawa E. E. Woodfield M. Lester S. E. Milan N. Sato A. S. Yukimatu T. Iyemori |
author_facet |
K. Hosokawa E. E. Woodfield M. Lester S. E. Milan N. Sato A. S. Yukimatu T. Iyemori |
author_sort |
K. Hosokawa |
title |
Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
title_short |
Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
title_full |
Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
title_fullStr |
Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
title_full_unstemmed |
Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
title_sort |
statistical characteristics of doppler spectral width as observed by the conjugate superdarn radars |
publisher |
Copernicus Publications |
publishDate |
2002 |
url |
https://doi.org/10.5194/angeo-20-1213-2002 https://doaj.org/article/656fa13b26fc4d3287c3f5a282428f3f |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Annales Geophysicae, Vol 20, Pp 1213-1223 (2002) |
op_relation |
https://www.ann-geophys.net/20/1213/2002/angeo-20-1213-2002.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-20-1213-2002 0992-7689 1432-0576 https://doaj.org/article/656fa13b26fc4d3287c3f5a282428f3f |
op_doi |
https://doi.org/10.5194/angeo-20-1213-2002 |
container_title |
Annales Geophysicae |
container_volume |
20 |
container_issue |
8 |
container_start_page |
1213 |
op_container_end_page |
1223 |
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1766038900422213632 |