Fig. 6. (Top) Effect of spacing L_S* and extent L_E* on the estimated sill _s*, by the weighted least squares (WLS, green) and maximum likelihood (ML, blue) methods, and the sample variance s²* (red). (Bottom) Effect of spacing L_S* and extent L_E* on the estimated correlation length * (WLS green, ML blue) and the integral scale * (red). Random sampling (median with 25 and 75% quantiles as error bars). All are for the two-parameter model.