The radio wave propagation velocity is slowed and the ray producing bend but to the asymmetry of the atmospheric medium, the refraction error is produced.
由于空中大气介质的不均匀性使得电波传播速度减慢射线产生弯曲，从而产生折射误差。
2
In this paper, We analyses the volatility asymmetry of the "bull " and "bear" market (i. e. sample), using generalized error distributed EGARCH (1,1) model in Small plate market.