Notebooks to create the figures and to run SMRT with the new Microwave grain size / Polydispersity theory published in G. Picard, H. Löwe, F. Domine, L. Arnaud, F. Larue, V. Favier, E. Le Meur, E. Lefebvre, J. Savarino, A. Royer, The microwave snow grain size: a new concept to predict Satellite observations over snow-covered regions, AGU Advances, 3, 4, e2021AV000630, doi:10.1029/2021AV000630