Analysis of the clusters on the cell walls inside the SPACE experiment during the suborbital flight. a) Region of interest inside an averaged and binarized data frame of the bigger experiment cell at the beginning of a fragmentation phase (61.8 s after beginning of the recording). b) Region of interest inside an averaged and binarized data frame of the same cell at the end of this fragmentation phase (76.5 s after beginning of the recording). The area covered by clusters (black areas) has visibly decreased.