物理学报2012，Vol.61Issue(19)：551-558,8.
低纬电离层人工调制所激发的ELF波射线追踪
Raytracing of extreamely low frequency waves radiated from ionospheric artificial modulation at low latitude
摘要
Abstract
Powerful high-frequency radio waves modulated at extremely low frequency (ELF) and very low frequency (VLF) can efficiently modify the lower ionospheric current which can act as an equivalent ionospheri'c antenna for the generation of ELF/VLF wave and these signals can propagate into the magnetosphere and the investigation of the propagation properties is of significance for understanding of radiation belt energetic electrons precipitation. In this paper, based on the raytracing theory, the ray paths of ELF waves in the magnetosphere are obtained using numerical modeling and the properties are analyzed. The results shows that the ELF waves generated from the low latitude reflect between the southern and northern hemisphere and propagate to the farther place gradually. For the signals with different frequencies, the higher their frequencies, the shorter their propagation distances are, the lower their frequencies, the longer their propagtion distances are. In the process, ELF waves tend to reflect near a fixed region. The normal angel increases to 90° gradually and ray direction tends to propagate along the direction of geomagnetic field.关键词
ELF波/射线追踪/电离层人工调制/低纬地区Key words
ELF waves/raytracing/ionospheric artificial modulation/low latitude分类
天文与地球科学引用本文复制引用
汪枫,赵正予,常珊珊,倪彬彬,顾旭东..低纬电离层人工调制所激发的ELF波射线追踪[J].物理学报,2012,61(19):551-558,8.基金项目
国家自然科学基金（批准号：40774100）资助的课题. （）
