$ϕ = 10^{- 3} S$		n
$ϕ = 10^{- 3} S$		10	50	100	200
$σ$	Mean	0.3125	0.2967	0.3027	0.2980
$σ$	RMSE	0.0787	0.0342	0.0238	0.0161