Flow chart of the data preprocessing, PPMAP calculations, and products’ post-processing steps applied in this study. “Postcorrection” and “Post-proc.” respectively refer to the treatments described in Appendix A.3 and Appendix A.4. “ASTROFIX” is the Gaussian process regression algorithm described in Appendix A.1.1. “VSG” stands for very small grains. The light blue boxes correspond to the final products released with this study.