F region ionosphere effects on the mapping accuracy of SuperDARN HF radar echoes
Structured particle precipitation in the cusp is an important source for the generation of F region ionospheric irregularities. The equatorward boundaries of broad Doppler spectral width in Super Dual Auroral Radar Network (SuperDARN) data and the concurrent OI 630.0 nm auroral emission are good emp...
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ftleicesterunfig:oai:figshare.com:article/10149263 2023-05-15T18:29:53+02:00 F region ionosphere effects on the mapping accuracy of SuperDARN HF radar echoes X.-C. Chen D. A. Lorentzen J. I. Moen K. Oksavik L. J. Baddeley Mark Lester 2016-05-19T00:00:00Z https://figshare.com/articles/journal_contribution/F_region_ionosphere_effects_on_the_mapping_accuracy_of_SuperDARN_HF_radar_echoes/10149263 unknown 2381/38000 https://figshare.com/articles/journal_contribution/F_region_ionosphere_effects_on_the_mapping_accuracy_of_SuperDARN_HF_radar_echoes/10149263 All Rights Reserved Uncategorized Science & Technology Physical Sciences Technology Astronomy & Astrophysics Geochemistry & Geophysics Meteorology & Atmospheric Sciences Remote Sensing Telecommunications OI 630 0nm auroral emission open-closed field line boundary SuperDARN spectral width HF radio wave propagation solar activity solar EUV POLAR-CAP PATCH PARTICLE-PRECIPITATION BOUNDARIES SPECTRAL WIDTH BOUNDARIES HIGH-LATITUDE CONVECTION FIELD LINE BOUNDARY ELECTRON-DENSITY MAGNETOSPHERIC CONVECTION BACKSCATTER ECHOES NETWORK SUPERDARN SECTOR IONOSPHERE Text Journal contribution 2016 ftleicesterunfig 2021-11-11T19:39:45Z Structured particle precipitation in the cusp is an important source for the generation of F region ionospheric irregularities. The equatorward boundaries of broad Doppler spectral width in Super Dual Auroral Radar Network (SuperDARN) data and the concurrent OI 630.0 nm auroral emission are good empirical proxies for the dayside open-closed field line boundary. However, SuperDARN currently employs a simple virtual model to determine the location of its echoes, instead of a direct calculation of the radio wave path. The varying ionospheric conditions could influence the final mapping accuracy of SuperDARN echoes. A statistical comparison of the offsets between the SuperDARN Finland radar spectral width boundary (SWB) and the OI 630.0 nm auroral emission boundary (AEB) from a meridian-scanning photometer (MSP) on Svalbard is performed in this paper. By restricting the location of the 630.0 nm data to be near local zenith where the MSP has the highest spatial resolution, the optical mapping errors were significantly reduced. The variation of the SWB-AEB offset confirms that there is a close relationship between the mapping accuracy of the HF radar echoes and solar activity. The asymmetric variation of the SWB-AEB offset versus magnetic local time suggests that the intake of high-density solar extreme ultraviolet ionized plasma from postnoon at subauroral latitudes could result in a stronger refraction of the HF radar signals in the noon sector, while changing the HF radar operating frequency also has a refraction effect that contributes to the final location of the HF radar echoes. Other Non-Article Part of Journal/Newspaper Svalbard University of Leicester: Figshare Svalbard |
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Open Polar |
collection |
University of Leicester: Figshare |
op_collection_id |
ftleicesterunfig |
language |
unknown |
topic |
Uncategorized Science & Technology Physical Sciences Technology Astronomy & Astrophysics Geochemistry & Geophysics Meteorology & Atmospheric Sciences Remote Sensing Telecommunications OI 630 0nm auroral emission open-closed field line boundary SuperDARN spectral width HF radio wave propagation solar activity solar EUV POLAR-CAP PATCH PARTICLE-PRECIPITATION BOUNDARIES SPECTRAL WIDTH BOUNDARIES HIGH-LATITUDE CONVECTION FIELD LINE BOUNDARY ELECTRON-DENSITY MAGNETOSPHERIC CONVECTION BACKSCATTER ECHOES NETWORK SUPERDARN SECTOR IONOSPHERE |
spellingShingle |
Uncategorized Science & Technology Physical Sciences Technology Astronomy & Astrophysics Geochemistry & Geophysics Meteorology & Atmospheric Sciences Remote Sensing Telecommunications OI 630 0nm auroral emission open-closed field line boundary SuperDARN spectral width HF radio wave propagation solar activity solar EUV POLAR-CAP PATCH PARTICLE-PRECIPITATION BOUNDARIES SPECTRAL WIDTH BOUNDARIES HIGH-LATITUDE CONVECTION FIELD LINE BOUNDARY ELECTRON-DENSITY MAGNETOSPHERIC CONVECTION BACKSCATTER ECHOES NETWORK SUPERDARN SECTOR IONOSPHERE X.-C. Chen D. A. Lorentzen J. I. Moen K. Oksavik L. J. Baddeley Mark Lester F region ionosphere effects on the mapping accuracy of SuperDARN HF radar echoes |
topic_facet |
Uncategorized Science & Technology Physical Sciences Technology Astronomy & Astrophysics Geochemistry & Geophysics Meteorology & Atmospheric Sciences Remote Sensing Telecommunications OI 630 0nm auroral emission open-closed field line boundary SuperDARN spectral width HF radio wave propagation solar activity solar EUV POLAR-CAP PATCH PARTICLE-PRECIPITATION BOUNDARIES SPECTRAL WIDTH BOUNDARIES HIGH-LATITUDE CONVECTION FIELD LINE BOUNDARY ELECTRON-DENSITY MAGNETOSPHERIC CONVECTION BACKSCATTER ECHOES NETWORK SUPERDARN SECTOR IONOSPHERE |
description |
Structured particle precipitation in the cusp is an important source for the generation of F region ionospheric irregularities. The equatorward boundaries of broad Doppler spectral width in Super Dual Auroral Radar Network (SuperDARN) data and the concurrent OI 630.0 nm auroral emission are good empirical proxies for the dayside open-closed field line boundary. However, SuperDARN currently employs a simple virtual model to determine the location of its echoes, instead of a direct calculation of the radio wave path. The varying ionospheric conditions could influence the final mapping accuracy of SuperDARN echoes. A statistical comparison of the offsets between the SuperDARN Finland radar spectral width boundary (SWB) and the OI 630.0 nm auroral emission boundary (AEB) from a meridian-scanning photometer (MSP) on Svalbard is performed in this paper. By restricting the location of the 630.0 nm data to be near local zenith where the MSP has the highest spatial resolution, the optical mapping errors were significantly reduced. The variation of the SWB-AEB offset confirms that there is a close relationship between the mapping accuracy of the HF radar echoes and solar activity. The asymmetric variation of the SWB-AEB offset versus magnetic local time suggests that the intake of high-density solar extreme ultraviolet ionized plasma from postnoon at subauroral latitudes could result in a stronger refraction of the HF radar signals in the noon sector, while changing the HF radar operating frequency also has a refraction effect that contributes to the final location of the HF radar echoes. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
X.-C. Chen D. A. Lorentzen J. I. Moen K. Oksavik L. J. Baddeley Mark Lester |
author_facet |
X.-C. Chen D. A. Lorentzen J. I. Moen K. Oksavik L. J. Baddeley Mark Lester |
author_sort |
X.-C. Chen |
title |
F region ionosphere effects on the mapping accuracy of SuperDARN HF radar echoes |
title_short |
F region ionosphere effects on the mapping accuracy of SuperDARN HF radar echoes |
title_full |
F region ionosphere effects on the mapping accuracy of SuperDARN HF radar echoes |
title_fullStr |
F region ionosphere effects on the mapping accuracy of SuperDARN HF radar echoes |
title_full_unstemmed |
F region ionosphere effects on the mapping accuracy of SuperDARN HF radar echoes |
title_sort |
f region ionosphere effects on the mapping accuracy of superdarn hf radar echoes |
publishDate |
2016 |
url |
https://figshare.com/articles/journal_contribution/F_region_ionosphere_effects_on_the_mapping_accuracy_of_SuperDARN_HF_radar_echoes/10149263 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_relation |
2381/38000 https://figshare.com/articles/journal_contribution/F_region_ionosphere_effects_on_the_mapping_accuracy_of_SuperDARN_HF_radar_echoes/10149263 |
op_rights |
All Rights Reserved |
_version_ |
1766213297686708224 |