中文摘要：

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.

英文摘要：

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.