3D rendered images of MIDAS dust particles. Panel a: particle F as example for a large agglomerate particle whose subunits arepacked in a moderately dense fashion on the surface (Mannel et al. 2016). The source scan was taken on 14 October 2015 at 08:08:23 UTC with a resolution of 192 nm. Panel b: large porous agglomerate particle E. The data are taken from a scan on 18 January 2015 at 20:59:28 UTC with a resolution of 210 nm. Panel c: particle G, which is representative for the small particle class. The source scan was taken on 11 May 2016 at 12:08:03 UTC with a resolution of 8 nm and is shown in Figs. 2 and in Appendix D.2.