Research on Electromagnetic Radiation and Propagation from the Earth

本研究包括以下两个主题：1。热等离子体中的射线追踪研制了热等离子体中的射线追踪程序，该程序可以计算静电波和电磁波的射线路径。将此应用于赤道附近静电回旋波的传播，并解释了科学卫星观测到的回旋波区域。阐明了静电波通过射电窗向Z模式和O模式转换的传播过程和连续转换过程。这一结果对研究非热连续辐射的产生机理具有重要意义。科学卫星观测到的等离子体波分析DE-1卫星观测到的电磁等离子体波。对Z模式的观测区域进行了测量，并与射线追踪计算结果进行了比较。提出了一种新的Z模生成机制的可能性。另一篇论文分析了同一颗卫星观测到的极光波。这种方法通过极化、到达方向以及波谱来区分波的传播模式。光线追踪证实了这些结果。

This research covers the following two topics.1. Ray tracing in a hot plasmaRay tracing code in a hot plasma which can calculate ray paths of both electrostatic and electromagnetic waves was developped. This is applied to propagation of the electrostatic cyclotron waves near the equator and observed areas of the waves by scientific satellites are explained. Propagation processes and continuous conversions of the electrostatic waves to the Z mode and its mode conversion to the O mode through the Radio Window are clarified. This result is valuable for the generation mechanism of the nonthermal continuum radiation.2. Analysis of plasma waves observed by a scientific satelliteElectromagnetic plasma waves observed by the DE-1 satellite are analyzed. Observed areas of the Z mode are surveyed and the results are compared with ray tracing calculations. Possibility of a new generation mechanism of the Z mode is suggested. Another paper analyzes auroral waves observed by the same satellite. This discriminates wave propagation modes by polarizations, arrival directions as well as wave spectra. Ray tracing confirms these results.