Implement kolmogorov zurbenko filter for preprocessing. Should be callable like the tranform method inside the data generator as method of the data preparation class. First implementation can be found here: https://gitlab.version.fz-juelich.de/leufen1/kolmogorovzurbenkofilter . But this implementation has to be adapted to the current situation.
NOTE: regard that a gaussian filter is not proper (because values are used for baseline, that are not available at the forecast point of time). -> use left side of gauss curve and a hard cut-off.