##SATELLITE  PARAMETERS
	url<-"http://vortex.nsstc.uah.edu/data/msu/t2lt/tltglhmam_5.2"
	g<-read.table(url,skip=5,nrow=320)
	GL<-ts(g[,3],start=c(1978,12),end=c(2005,7),freq=12)
	test<-arima(GL,order=c(1,0,1)); test
	#Coefficients:
        # 	ar1      ma1  intercept
	#      0.9216  -0.3159     0.0441
	#s.e.  0.0248   0.0574     0.0520
	
	#sigma^2 estimated as 0.01214:  log likelihood = 251.04,  aic = -494.08
	sqrt(test$sigma2) # 0.1101969