Study of Magnetospheric Plasma Waves by Multiple Satellites

目前的项目是基于GEOTAIL、WIND、AKEBONO、ULYSSES、Freja、POLAR和INTERBALL航天器之间的合作而规划的。但是，由于POLAR和INTERBALL航天器发射计划的推迟，我们主要进行了GEOTAIl-WIND、GEOTAIL-ULYSSES和AKEBONO-Freja航天器之间的合作。GEOTAIL和尤利西斯之间的合作重点是在发射WIND航天器之前研究行星际冲击。USLYSSES对木星附近行星际激波的观测表明，GEOTAIL对地球附近行星际激波的观测结果与USLYSSES对木星附近行星际激波的观测结果具有良好的相关性。在GEOTAIL和WIND航天器的合作中，我们关注了2fp发射、AKR发射和III型太阳射电爆发。利用GEOTAIL和WIND之间的观测延迟时间，我们成功地探测到了2fp辐射的源区域。进一步的详细研究将继续使用更多的数据集。在超过100kHz的高频范围内观察到AKR发射。它在极区辐射，其产生机制与地磁活动密切相关。利用GEOTAIL和WIND观测资料研究了AKR的传播特性。两点观测为我们提供了AKR传播的重要信息。我们发现AKR的观测结果具有很强的位置依赖性。我们使用III型太阳射电爆发检查了GEOTAIL和WIND航天器上接收器的校准。我们发现他们的校准强度很一致。在AKEBONO和Freja卫星的合作下，对极地等离子体波活动进行了研究。本文以极地观测到的离子回旋波为研究对象，结合两颗不同高度卫星的观测资料，用线性理论讨论了离子回旋波的产生机理。

The present project was planned based on the collaboration among GEOTAIL,WIND,AKEBONO,ULYSSES,Freja, POLAR,and INTERBALL spacecraft. However, due to the delay of the launch schedule of the POLAR and INTERBALL spacecraft, we proceeded the collaboration mainly among the GEOTAIl-WIND,GEOTAIL-ULYSSES,and AKEBONO-Freja spacecraft. The collaboration between the GEOTAIL and ULYSSES focused on the study on the interplanetary shock before launching the WIND spacecraft. The USLYSSES observations on the interplanetary shock near the Jupiter showed the good correlation with them by GEOTAIL near the Earth.On the collaboration between the GEOTAIL and WIND spacecraft, we paid our attention to the 2fp emissions, AKR emissions and Type III solar radio bursts. We successfully detected the source region of the 2fp emissions using the delay time of the observations between GEOTAIL and WIND.Further detailed study is continued using the more datasets.The AKR emissions are observed in the high frequency range beyond 100kHz. It is radiated in the polar region and its generation mechanism is closely related to the geomagnetic activities. We studied the propagation characteristics of the AKR using the GEOTAIL and WIND observations. The 2 point observations provide us the important information on the propagation of the AKR.We found the strong location dependence on the observations of the AKR.we checked the calibration of the receivers onboard the GEOTAIL and WIND spacecraft using the Type III solar radio bursts. We found the good agreement on the calibrated intensities of theirs.The plasma wave activities in the polar region were investigated under the collaboration between the AKEBONO and Freja satellites. We focus on the ion cyclotron waves observed in the polar region and discussed their generation mechanisms using the linear theory based on the observations by these 2 satellites which were located in the different altitudes.