Hi Carlo,
Note that a sill strongly different from 1 would
mean that the assumption of 2nd order stationarity
underlying SGS is not met.
I wouldn't force the sill to be one when
fitting the model and you have to use a unit sill
model in the simulation program for consistency.
If the deviation is not larger than say 0.1,
I would fit the model to the
experimental values and then rescale the
fitted sills so that they sum to 1 for use
in the simulation program.
Pierre
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On Mon, 8 Jul 2002, Carlo Cardellini wrote:
> Hello,
> I have a question about the variogram model of normal scores to use as
> input in the sequential gaussian simulation: the sill must be 1? and if
> this is necessary, if the experimenal variogram of the normal scores
> presents an higher sill what is better to do?.... use model with sill 1 or
> use the "true" model?
> Thank you in advance to everyone.
> Sincerelly,
> Carlo
>
>
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