Iteratively calculated mass, m_iter, versus measurement-derived mass, m_msr, for all particles of the union subset (small circles). The marker colours denote the measurement-derived impact speeds, v_msr. Particles with impact speeds below v_msr ≤ 3 km/s are highlighted as crosses. For these particles, the measurement-derived impact speeds are most likely severely underestimated, and thus the measurement-derived particle masses are severely overestimated (cf. Sect. 4.1). Different clusters of most massive particles, A_1, 2, 3, aggregated to Subset A, are highlighted as squares; these particles are numbered 1–10. Another subset of massive particles, Subset B (Sect. 6.3), is marked by triangles. The dotted diagonal line denotes m_msr = m_iter.