Study of electromagnetic wave by FM-CW radar system

FM-CW雷达系统电磁波研究

• 批准号: 22840033
• 负责人: IKEDA Akihiro
• 金额: $ 1.74万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Research Activity Start-up
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22840033/
• 关键词: 電離圏; 短波レーダー; 地磁気脈動; 電磁波動; 電場; 磁気圏; 磁気圏-電離圏

By using an FM-CW radar system, we succeeded in detecting Pc5 range(150-600 sec.) ionospheric electric field variation which corresponded with ground magnetic oscillation. From the comparison of low-latitude ionospheric electric field and ground magnetic field variation at an equatorial station, we concluded that the ionosphere performs as a LR circuit when Pc5 range ionospheric electric field penetrates into the lower-latitude ionosphere, and the ionospheric electric field generates ground magnetic field oscillation. We also analyzed magnetic field data obtained at the geosynchronous orbit and examined local time dependence of occurrence of Pc4 range(45-150 sec.) magnetic oscillations. It seems that the Kelvin-Helmholtz instability and the upstream waves generate Pc4 range oscillations inside the magnetosphere.

利用调频连续波雷达系统，成功地探测到了Pc 5距离（150-600秒）。电离层电场变化与地磁振荡相对应。通过比较赤道站低纬电离层电场和地磁场的变化，得出当Pc 5量级电离层电场进入低纬电离层时，电离层表现为LR回路，电离层电场引起地磁场振荡的结论。我们还分析了在地球同步轨道上获得的磁场数据，并研究了Pc 4范围（45-150秒）发生的当地时间依赖性。磁振荡看来Kelvin-Helmholtz不稳定性和上游波在磁层内部产生Pc 4范围振荡。

项目成果

Long period Ionospheric Electric and Magnetic Field Variations Observed by FM-CW Radar and MAGDAS

FM-CW雷达和MAGDAS观测的长周期电离层电场和磁场变化

• 发表时间: 2011
• 作者: Ikeda A.;K.Yumoto;Y.Kakinami;M.Shinohara;K.Nozaki;T.Nagatsuma;A.Yoshikawa;B.M.Shevtsov;V.V.Bychkov;Q.M.Sugon;Jr;D.McNamara
• 通讯作者: D.McNamara

Night-side DP-2 type fluctuations observed by the FM-CW Radar and MAGDAS stations

FM-CW 雷达和 MAGDAS 站观测到的夜间 DP-2 型波动

• 发表时间: 2010
• 作者: Ikeda;A.;K Yumoto;T Uozumi;S Abe;M Shinohara;K Nozaki;A Yoshikawa;V Bychkov;B Shevtsov;Q Sugon;D McNamara
• 通讯作者: D McNamara

DP2 TYPE ELECTRIC FIELD FLUCTUATIONS OBSERVED BY FM-CW HF RADAR NETWORK, SOLAR-TERRESTRIAL RELATIONS AND PHYSICS OF EARTHQUAKES PRECUR SORS

FM-CW高频雷达网观测的DP2型电场脉动、日地关系及地震前兆物理

• 发表时间: 2010
• 期刊: SOLAR-TERRESTRIAL RELATIONS AND PHYSICS OF EARTHQUAKES PRECURSORS, V INTERNATIONAL CONFERENCE, COLLECTION OF THE REPORTS
• 作者: Shinohara M.;A.Ikeda;K.Nozaki;A.Yoshikawa;V.V.Bychkov;B.M.Shevtsov;K.Yumoto
• 通讯作者: K.Yumoto

Title of Team : MAGDAS Project Team, Current Status of MAGDAS Deployment in Africa(ポスター)

团队名称：MAGDAS 项目团队，MAGDAS 在非洲的部署现状（海报）

• 发表时间: 2010
• 作者: G Maeda;K Yumoto;Y Kakinami;T Tokunaga;A Fujimoto;A Ikeda;Y Yamazaki;S Abe;M Sakai;N Eto;M Shinohara
• 通讯作者: M Shinohara

Ionospheric Current System over the African Region and East Asian Region as Observed by MAGDAS Stations

MAGDAS站观测的非洲地区和东亚地区电离层电流系统

• 发表时间: 2010
• 作者: K Yumoto;Y Yamazaki;A Rabiu;A Mahrous;A Meloni;P Baki;N Makundi;T Afullo;L A McKinnell;K Badi;H Mweene;A Macamo;S Abe;A Ikeda;A Fujimoto;T Tokunaga;Y Fujita;K Matsuyama
• 通讯作者: K Matsuyama