At the moment the input parameters u and d of the TranslationDiffusionEquation are dependent on the simulationstepsize and the dimension of the routing length x. This leads often to confusion with units. Especially when calibrating the arma-model. Since not the responses itself are calibrated, but the parameter u and d of the translation diffusion equation it gets more complicated. A change in simulationstepsize needs therefore always an adjustment of the parameters u and d, because no parameterstep dependency of u and d is implemented.