all third-level commands in block > OBSERVATION
This command provides automatic weighting of observations. The standard deviation calculated by iTOUGH2 is 10 % of the mean of the observed values for a given data set. It is suggested, however, that the assumed measurement error or expected standard deviation of the final residuals be explicitly provided using command >>>> DEVIATION (o).
>>> ELEMENT: BH__0
>>>> AUTOmatic weighting
>>>> DATA are on FILE: pres.dat
>>>> DEVIATION (o)