Convergence process of the planet data post-treatment for a 143 GHz channel. The first guess (iteration 0) is a beam built using a different (obsolete) recovery of the temporal transfer function. The figure illustrates how sensitive the reconstruction is to any change in the time response and in this case how it readjusts through the iterations. The dash-dot lines are the standard deviation of the spread from the associated Monte Carlo ensembles. The number of iterations was chosen so that the iteration variation within the last loop (iterations 4 and 5) is conservatively within the error bars for all channels from 100 GHz to 353 GHz.