Fig. 2.

Dependences of the degree of linear polarization on phase angle for a Lokon volcano ash sample. Open symbols are results for single-scattering particles; filled ones—for the regolith consisting of exactly the same particles. The SEM image on the right-hand panel shows the morphology of Lokon volcano ash particles. Measurement data are adapted from Shkuratov et al. (2004); whereas the SEM image is from Shkuratov et al. (2006).