$ϕ = 10^{- 3} S$		n
$ϕ = 10^{- 3} S$		10	50	100	200
$σ$	Mean	0.2881	0.2997	0.2985	0.3012
$σ$	RMSE	0.0682	0.0298	0.0246	0.0242