摘要
给出了任意非麦克斯韦速度分布条件下,碰撞等离子体非相干散射谱的求解方法的一般表达式,并给出了谱计算中,所必需的两个复奇点积分的计算方法.计算了低电离层HF加热下功率谱,讨论了碰撞频率、非麦氏指数、电子密度、电子温度和离子温度对功率谱的影响.由于碰撞和非麦克斯韦因子的作用,原有的电离层参量和谱型特征的对应关系不再成立,这会对电离层参量的反演带来很大误差,必须对原有的理论模型予以修正.
Incoherent scattering spectrum of a collisional plasma with an arbitrary velocity distribution function is presented in this paper. Two integrals with complex singular points have been solved in order to obtain the resuhs. The incoherent scatter spectrum during HF heating in low ionosphere region is computed. The effeet of collision frequency, non-Maxwellian index, electron density, electron temperature and ion temperature on power spectrum is discussed. Under the action of collision frequency and non-Maxwellian factor, the original relationship between ionospheric parametem and the characteristics of spectral shape is invalid, which will bring about a large error in the inversion of ionosphere parameters, thus the original theoretical model must be revised.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第7期5104-5110,共7页
Acta Physica Sinica
基金
国家自然科学基金重点项目(批准号:40831062)
国家科技支撑计划(批准号:2006BAB18B06)
电波环境特性及模化技术国家重点实验室基金资助的课题~~
关键词
功率谱
非相干散射雷达
非麦克斯韦分布函数
碰撞
power spectra, incoherent radar, non-Maxwellian distribution function, collision
