高阶矩谱分析与空间等离子体非线性相互作用识别

HIGHER-ORDER STATISTICS AND IDENTIFICATION OF NON-LINEAR PROCESSES IN SPACE PLASMAS

利用高阶矩统计分析方法对AUREOL－3卫星观测数据进行分析处理，所涉及的信号分别为ELF（＜1kHz）频率范围内的电场扰动Eh（t）和等离子体密度波动δNe／Ne（t）．处理结果表明：利用高阶矩谱分析方法可以很好地识别空间等离子体波-粒相互作用过程中的非线性成分．

Using the higher-order statistical methods, the physical properties of certainsatallite data were described. The question addressed in this paper is the usefulness of higher-order statistics for identification of the wave-particles interaction inspace plasmas. The signals considered here are respectively ELF frequency rangeelectrostatic turbulence and fluctuation in electron density measured on the low latitude satellite AUREOL-3 from the ARCAD-3 scientific experiment. The analysisshows that one can well identify the non-linear behaviour in the processes usingsuch method.