Study of Magnetospheric Plasma Waves by Multiple Satellites

本项目是在GEOTAIL、WIND、Akebono、Ulysses、Freja、PERBALL和INTERBALL航天器之间合作的基础上规划的。然而，由于极地航天器和洲际航天器发射时间表的推迟，我们主要在GeoTail-Wind、GEOTAIL-Ulysses和Akebono-Freja航天器之间进行了合作。GEOTAIL和Ulysses之间的合作重点是在发射WIND航天器之前研究星际激波。USLYSSES对木星附近行星际激波的观测表明，GEOTAIL与地球附近的星际激波具有良好的相关性。在GEOTAIL与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。我们利用GEOTAIL和WIND观测的延迟时间成功地探测到了2Fp发射的源区，并使用更多的数据集继续进行详细的研究，在100 kHz以上的高频范围内观测到了AKR发射。它辐射于极区，其产生机制与地磁活动密切相关。我们利用GEOTAIL和风场观测资料研究了AKR的传播特征。两点观测为我们提供了有关AKR传播的重要信息。我们发现AKR的位置依赖于AKR的观测。我们使用III型太阳射电爆发检查了GEOTAIL和WIND航天器上接收器的定标。在Akebono卫星和Freja卫星的合作下，我们研究了极区的等离子体波活动。根据这两颗卫星在不同高度的观测结果，利用线性理论讨论了在极区观测到的离子回旋波的产生机制。

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.