Comparison of meridional thermospheric winds observed by ionosondes and Fabry-Perot interferometers
To comprehend ionospheric-thermospheric coupling, one must understand the thermospheric wind system. However, measuring the thermospheric wind using a Fabry-Perot interferometer (FPI) is not an easy task. Because of this difficulty, some researchers have estimated meridional wind velocities using da...
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doaj-948ed004a5464a959e3d8ea18778bee52020-11-24T21:39:16ZengNational Institute of Polar ResearchAntarctic Record0085-72892432-079X2013-11-0157335736810.15094/00009710Comparison of meridional thermospheric winds observed by ionosondes and Fabry-Perot interferometersMichi Nishioka0Takashi Maruyama1Yuichi Otsuka2Takuya Tsugawa3Hiromitsu Ishibashi4Kazuo Shiokawa5Mamoru Ishii6National Institute of Information and Communications TechnologyNational Institute of Information and Communications TechnologySolar-Terrestrial Environment Laboratory, Nagoya UniversityNational Institute of Information and Communications TechnologyNational Institute of Information and Communications TechnologySolar-Terrestrial Environment Laboratory, Nagoya UniversityNational Institute of Information and Communications TechnologyTo comprehend ionospheric-thermospheric coupling, one must understand the thermospheric wind system. However, measuring the thermospheric wind using a Fabry-Perot interferometer (FPI) is not an easy task. Because of this difficulty, some researchers have estimated meridional wind velocities using data obtained from a pair of ionosonde stations near the geomagnetic conjugate points, under the assumption that the meridional wind is the same at the two ionosonde stations (transequatorial mode wind). In this paper, we construct the first comparison of the estimated meridional wind velocitieswith meridional wind observed with FPIs. We analyzed data from the ionosondes and FPIs installed at Chiang Mai, Thailand, and Kototabang, Indonesia, from 2010. We found that the estimated and observed wind velocities were generally in good agreement on most nights, although on some nights, the wind velocities were different. The assumption that the meridional wind is equal anywhere between the two ionosonde stations would not be suitable for the days when the winds were not in good agreement. We also investigated the seasonal dependence of the correlation between the estimated and observed meridional winds. They were in good agreement from February to April and were not in good agreement from May to July.http://doi.org/10.15094/00009710 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Michi Nishioka Takashi Maruyama Yuichi Otsuka Takuya Tsugawa Hiromitsu Ishibashi Kazuo Shiokawa Mamoru Ishii |
spellingShingle |
Michi Nishioka Takashi Maruyama Yuichi Otsuka Takuya Tsugawa Hiromitsu Ishibashi Kazuo Shiokawa Mamoru Ishii Comparison of meridional thermospheric winds observed by ionosondes and Fabry-Perot interferometers Antarctic Record |
author_facet |
Michi Nishioka Takashi Maruyama Yuichi Otsuka Takuya Tsugawa Hiromitsu Ishibashi Kazuo Shiokawa Mamoru Ishii |
author_sort |
Michi Nishioka |
title |
Comparison of meridional thermospheric winds observed by ionosondes and Fabry-Perot interferometers |
title_short |
Comparison of meridional thermospheric winds observed by ionosondes and Fabry-Perot interferometers |
title_full |
Comparison of meridional thermospheric winds observed by ionosondes and Fabry-Perot interferometers |
title_fullStr |
Comparison of meridional thermospheric winds observed by ionosondes and Fabry-Perot interferometers |
title_full_unstemmed |
Comparison of meridional thermospheric winds observed by ionosondes and Fabry-Perot interferometers |
title_sort |
comparison of meridional thermospheric winds observed by ionosondes and fabry-perot interferometers |
publisher |
National Institute of Polar Research |
series |
Antarctic Record |
issn |
0085-7289 2432-079X |
publishDate |
2013-11-01 |
description |
To comprehend ionospheric-thermospheric coupling, one must understand the thermospheric wind system. However, measuring the thermospheric wind using a Fabry-Perot interferometer (FPI) is not an easy task. Because of this difficulty, some researchers have estimated meridional wind velocities using data obtained from a pair of ionosonde stations near the geomagnetic conjugate points, under the assumption that the meridional wind is the same at the two ionosonde stations (transequatorial mode wind). In this paper, we construct the first comparison of the estimated meridional wind velocitieswith meridional wind observed with FPIs. We analyzed data from the ionosondes and FPIs installed at Chiang Mai, Thailand, and Kototabang, Indonesia, from 2010. We found that the estimated and observed wind velocities were generally in good agreement on most nights, although on some nights, the wind velocities were different. The assumption that the meridional wind is equal anywhere between the two ionosonde stations would not be suitable for the days when the winds were not in good agreement. We also investigated the seasonal dependence of the correlation between the estimated and observed meridional winds. They were in good agreement from February to April and were not in good agreement from May to July. |
url |
http://doi.org/10.15094/00009710 |
work_keys_str_mv |
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