Physics and modeling of asymmetric magnetosphere

非对称磁层的物理和建模

• 批准号: 13640451
• 负责人: IYEMORI Toshihiko
• 金额: $ 2.11万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640451/
• 关键词: Oersted satellite; inner magnetosphere; current structure; SuperDARN; net field-aligned current; ground geomagnetic variation; HF radar; polar ionosphere; 沿磁力線電流; 磁気圏構造; 地方時依存性

(1) The geomagnetic field data obtained by the Oersted satellite have been transferred from DMI and accumulated on a hard disk array.(2) The softwares for satellite data analysis have been developed.(3) The data observed by the DE-1 satellite are also analyzed to examine the magnetic signature of field-aligned current in the inner magnetosphere.(4) From the ground geomagnetic data obtained in mid-latitudes, the field-aligned currents distribution and their seasonal variation were estimated.(5) From the magnetic observation by the Oersted satellite at mid- and low-latitudes, we obtained the local time distribution of the net field-aligned currents in the polar region. It was confirmed that the net current flows into the ionosphere at the local time before noon and flows out from the ionospher before midnight.(6) From an analysis of the DE-1 satellite magnetic observation data at high-altitude, we could also confirm the existence of the net field-aligned currents flowing from dayside to nightside.(7) To investigate the ionospheric current structure, we constructed a database of SuperDARN dataset.

(1) Oersted卫星获得的地磁场数据已从DMI传输到硬盘阵列上。(2)研制了卫星数据分析软件。(3)对DE-1卫星观测资料进行分析，探讨了内磁层场向电流的磁特征。(4)利用中纬度地区的地磁资料，估算了中纬度地区的场向流分布及其季节变化。(5)利用Oersted卫星在中低纬度地区的磁观测，得到了极区净场向流的局时分布。经证实，净电流在当地时间中午之前流入电离层，在午夜之前流出电离层。(6)通过对DE-1卫星高空磁观测资料的分析，也证实了从日侧向夜侧流动的净场向流的存在。(7)为了研究电离层电流结构，我们构建了superdamn数据集数据库。

项目成果

Kosaka, K., T.Iyemori, M.Nose, M.Bitterly, J.Bitterly: "Local time dependence of the Pi2 pulsations at mid-and low-latitudes"Earth, Planets and Space. 54. 771-781 (2002)

Kosaka, K.、T.Iyemori、M.Nose、M.Bitterly、J.Bitterly：“中低纬度 Pi2 脉动的局地时间依赖性”地球、行星和空间。

Yamashita, S., T.Iyemori, S.Nakano, T.Kamei, T.Araki: "Anti-sunward net Birkeland current system deduced from the Oersted satellite observation"J.Geophys.Res.. 107・A9. 10.1029/2001JA900160 (2002)

Yamashita, S., T.Iyemori, S.Nakano, T.Kamei, T.Araki：“从奥斯特卫星观测推导出的反太阳网白克兰流系统”J.Geophys.Res.. 107・A9. 10.1029/2001JA900160。 (2002)

Nakano, S., T.Iyemori, S.Yamasita: "Net fiels-aligned currents controlled by the polar ionospheric conductivity"J.Geophys.Res.. 107,A5. 10.1029/2002JA900177 (2002)

Nakano, S.、T.Iyemori、S.Yamasita：“极地电离层电导率控制的净场对准电流”J.Geophys.Res.. 107，A5。

Kosaka, K., T. Iyemori, M. Nose, M. Bitterly, and J. Bitterly: "Local time dependence of the Pi2 pulsations at mid- and low-latitudes"Earth, Planets and Space. 54. 771-781 (2002)

Kosaka, K.、T. Iyemori、M. Nose、M. Bitterly 和 J. Bitterly：“中低纬度 Pi2 脉动的局地时间依赖性”地球、行星和空间。

Nakano, S. and T. Iyemori: "Local-time distribution of net field-aligned currents derived from high-altitude satellite observation"J. Geophys. Res.. 108 (in press). (2003)

Nakano, S. 和 T. Iyemori：“来自高空卫星观测的净场对准电流的局时分布”J。