Comparison of the magnetic equivalent convection direction and ionospheric convection observed by the SuperDARN radars
SuperDARN radar and high-latitude magnetometer observations are used to statistically investigate quality of the convection direction estimates from magnetometer data if assumption is made that the magnetic equivalent convection vector (MEC) corresponds to the convection direction. The statistic...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2006-11-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/24/2981/2006/angeo-24-2981-2006.pdf |
| _version_ | 1818350217442885632 |
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| author | L. V. Benkevitch A. V. Koustov J. Liang J. F. Watermann |
| author_facet | L. V. Benkevitch A. V. Koustov J. Liang J. F. Watermann |
| author_sort | L. V. Benkevitch |
| collection | DOAJ |
| description | SuperDARN radar and high-latitude magnetometer observations are used to
statistically investigate quality of the convection direction estimates from
magnetometer data if assumption is made that the magnetic equivalent
convection vector (MEC) corresponds to the convection direction. The
statistics includes five full days, ~75 000 of joint individual
measurements for different seasons. It is demonstrated that the best (worst)
agreement between the MEC and ionospheric convection occurs for the sunlit,
summer (dark, winter) ionosphere. Overall, the MEC direction is reasonable
(deviates less than 45° from the SuperDARN direction) in at least ~55% of points and it is better for the latitudes of the auroral oval. In
terms of the magnetic local time, the agreement is the best (worst) in the
dusk (early morning) sector. Possible reasons for differences between the
MEC and ionospheric convection directions are discussed. |
| first_indexed | 2024-12-13T18:18:20Z |
| format | Article |
| id | doaj.art-d0eb22f031e64528baaee22b16012e74 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-13T18:18:20Z |
| publishDate | 2006-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-d0eb22f031e64528baaee22b16012e742022-12-21T23:35:48ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762006-11-01242981299010.5194/angeo-24-2981-2006Comparison of the magnetic equivalent convection direction and ionospheric convection observed by the SuperDARN radarsL. V. Benkevitch0A. V. Koustov1J. Liang2J. F. Watermann3Institute of Space and Atmospheric Studies, University of Saskatchewan, 116 Science Place, Saskatoon, S7N 5E2 CanadaInstitute of Space and Atmospheric Studies, University of Saskatchewan, 116 Science Place, Saskatoon, S7N 5E2 CanadaCanadian Space Agency, Saint-Hubert, Quebec, CanadaDanish Meteorological Institute, Lyngbyvej 100, 2100 Copenhagen, DenmarkSuperDARN radar and high-latitude magnetometer observations are used to statistically investigate quality of the convection direction estimates from magnetometer data if assumption is made that the magnetic equivalent convection vector (MEC) corresponds to the convection direction. The statistics includes five full days, ~75 000 of joint individual measurements for different seasons. It is demonstrated that the best (worst) agreement between the MEC and ionospheric convection occurs for the sunlit, summer (dark, winter) ionosphere. Overall, the MEC direction is reasonable (deviates less than 45° from the SuperDARN direction) in at least ~55% of points and it is better for the latitudes of the auroral oval. In terms of the magnetic local time, the agreement is the best (worst) in the dusk (early morning) sector. Possible reasons for differences between the MEC and ionospheric convection directions are discussed.https://www.ann-geophys.net/24/2981/2006/angeo-24-2981-2006.pdf |
| spellingShingle | L. V. Benkevitch A. V. Koustov J. Liang J. F. Watermann Comparison of the magnetic equivalent convection direction and ionospheric convection observed by the SuperDARN radars Annales Geophysicae |
| title | Comparison of the magnetic equivalent convection direction and ionospheric convection observed by the SuperDARN radars |
| title_full | Comparison of the magnetic equivalent convection direction and ionospheric convection observed by the SuperDARN radars |
| title_fullStr | Comparison of the magnetic equivalent convection direction and ionospheric convection observed by the SuperDARN radars |
| title_full_unstemmed | Comparison of the magnetic equivalent convection direction and ionospheric convection observed by the SuperDARN radars |
| title_short | Comparison of the magnetic equivalent convection direction and ionospheric convection observed by the SuperDARN radars |
| title_sort | comparison of the magnetic equivalent convection direction and ionospheric convection observed by the superdarn radars |
| url | https://www.ann-geophys.net/24/2981/2006/angeo-24-2981-2006.pdf |
| work_keys_str_mv | AT lvbenkevitch comparisonofthemagneticequivalentconvectiondirectionandionosphericconvectionobservedbythesuperdarnradars AT avkoustov comparisonofthemagneticequivalentconvectiondirectionandionosphericconvectionobservedbythesuperdarnradars AT jliang comparisonofthemagneticequivalentconvectiondirectionandionosphericconvectionobservedbythesuperdarnradars AT jfwatermann comparisonofthemagneticequivalentconvectiondirectionandionosphericconvectionobservedbythesuperdarnradars |