- After preprocessing the model and observation data, the following steps used to generate the paleo-reanalysis 1, Cycle 1 - run the assimilation_PALAEORA.R script (to start the script several times: start_assimilation_script.sh) 2, Cycle 2 - use debiasing.R script for observations in the second cycle (to start the script several times: start_debiasing_script.sh) - a very simple check whether all data in the given cycle were debiased (bias_check.R) - add the bias terms to the input file from previous cycle (bias_add_inout.R) - run the assimilation_PALAEORA.R script 3, Cycle 3 - same steps as in Cycle 2