Double Coherent Scatter Radars Observations of the Daytime F‐Region Irregularities in Low‐Latitudes on 29 May 2017
Abstract In the morning on 29 May 2017, the Sanya very‐high‐frequency Radar and the Hainan COherent Scatter Phased Array Radar (HCOPAR) at Fuke were cooperated with similar operating frequencies to investigate the dissipation of the daytime F‐region Field‐Aligned Irregularities (FAIs). The two radar...
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| Format: | Article |
| Language: | English |
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Wiley
2022-12-01
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| Series: | Space Weather |
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| Online Access: | https://doi.org/10.1029/2022SW003272 |
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| author | Pengfei Hu Gang Chen Guozhu Li Chunxiao Yan Shaodong Zhang Guotao Yang Yaxian Li Zhiqiu He Wei Jia Min Zhang |
| author_facet | Pengfei Hu Gang Chen Guozhu Li Chunxiao Yan Shaodong Zhang Guotao Yang Yaxian Li Zhiqiu He Wei Jia Min Zhang |
| author_sort | Pengfei Hu |
| collection | DOAJ |
| description | Abstract In the morning on 29 May 2017, the Sanya very‐high‐frequency Radar and the Hainan COherent Scatter Phased Array Radar (HCOPAR) at Fuke were cooperated with similar operating frequencies to investigate the dissipation of the daytime F‐region Field‐Aligned Irregularities (FAIs). The two radars are located on south and north sides of the Hainan island of China, and the distance between them is about 140 km. The Sanya VHF radar recorded the FAIs between 00:12 and 02:42 UT (07:12 and 09:42 LT), and the FAIs observed by the HCOPAR appeared more than 10 min later at lower altitudes and suffered severe dissipation. The echoes emerged in all the beams simultaneously, and their Doppler velocities were close to zero, implying that the daytime FAIs were traveling along the magnetic field lines downward and northward with almost no zonal velocity. The front and bottom edges of the irregularities decayed earlier, and the parts in the FAIs with steeper density gradient lasted longer. The dissipation mechanism is attributed primarily to the photoionization and diffusing across the geomagnetic field in different period and gradient of the irregularities. |
| format | Article |
| id | doaj-art-7be53a6039464b5390eb69144a54bb3c |
| institution | Kabale University |
| issn | 1542-7390 |
| language | English |
| publishDate | 2022-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-7be53a6039464b5390eb69144a54bb3c2025-01-14T16:30:23ZengWileySpace Weather1542-73902022-12-012012n/an/a10.1029/2022SW003272Double Coherent Scatter Radars Observations of the Daytime F‐Region Irregularities in Low‐Latitudes on 29 May 2017Pengfei Hu0Gang Chen1Guozhu Li2Chunxiao Yan3Shaodong Zhang4Guotao Yang5Yaxian Li6Zhiqiu He7Wei Jia8Min Zhang9Electronic Information School Wuhan University Wuhan ChinaElectronic Information School Wuhan University Wuhan ChinaInstitute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaElectronic Information School Wuhan University Wuhan ChinaElectronic Information School Wuhan University Wuhan ChinaState Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Beijing ChinaElectronic Information School Wuhan University Wuhan ChinaElectronic Information School Wuhan University Wuhan ChinaElectronic Information School Wuhan University Wuhan ChinaElectronic Information School Wuhan University Wuhan ChinaAbstract In the morning on 29 May 2017, the Sanya very‐high‐frequency Radar and the Hainan COherent Scatter Phased Array Radar (HCOPAR) at Fuke were cooperated with similar operating frequencies to investigate the dissipation of the daytime F‐region Field‐Aligned Irregularities (FAIs). The two radars are located on south and north sides of the Hainan island of China, and the distance between them is about 140 km. The Sanya VHF radar recorded the FAIs between 00:12 and 02:42 UT (07:12 and 09:42 LT), and the FAIs observed by the HCOPAR appeared more than 10 min later at lower altitudes and suffered severe dissipation. The echoes emerged in all the beams simultaneously, and their Doppler velocities were close to zero, implying that the daytime FAIs were traveling along the magnetic field lines downward and northward with almost no zonal velocity. The front and bottom edges of the irregularities decayed earlier, and the parts in the FAIs with steeper density gradient lasted longer. The dissipation mechanism is attributed primarily to the photoionization and diffusing across the geomagnetic field in different period and gradient of the irregularities.https://doi.org/10.1029/2022SW003272F‐region irregularitydaytime |
| spellingShingle | Pengfei Hu Gang Chen Guozhu Li Chunxiao Yan Shaodong Zhang Guotao Yang Yaxian Li Zhiqiu He Wei Jia Min Zhang Double Coherent Scatter Radars Observations of the Daytime F‐Region Irregularities in Low‐Latitudes on 29 May 2017 Space Weather F‐region irregularity daytime |
| title | Double Coherent Scatter Radars Observations of the Daytime F‐Region Irregularities in Low‐Latitudes on 29 May 2017 |
| title_full | Double Coherent Scatter Radars Observations of the Daytime F‐Region Irregularities in Low‐Latitudes on 29 May 2017 |
| title_fullStr | Double Coherent Scatter Radars Observations of the Daytime F‐Region Irregularities in Low‐Latitudes on 29 May 2017 |
| title_full_unstemmed | Double Coherent Scatter Radars Observations of the Daytime F‐Region Irregularities in Low‐Latitudes on 29 May 2017 |
| title_short | Double Coherent Scatter Radars Observations of the Daytime F‐Region Irregularities in Low‐Latitudes on 29 May 2017 |
| title_sort | double coherent scatter radars observations of the daytime f region irregularities in low latitudes on 29 may 2017 |
| topic | F‐region irregularity daytime |
| url | https://doi.org/10.1029/2022SW003272 |
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