An Optimized Identification Method for Radiation Belt Electron Butterfly Pitch Angle Distributions based on the Chi-square Distribution Function

This is the auxiliary material for the paper "An optimized identification method for radiation belt electron butterfly pitch angle distributions based on the Chi-square distribution function". The material include our chi-square model. Please see readme.txt.本辅助材料对应论文《基于卡方分布函数（Chi-square distribution function）的辐射带电子蝴蝶状投掷角分布优化识别方法》，其中包含我们所提出的卡方模型。详细信息请参阅readme.txt。