TerraSAR-X images in a 10 × 10 km box about the ITP-Vs. C2 in a) on 21 April and in b) on 5 June, C3 on c) 15 April and d) 5 June, and C4 on e) 21 April and f) 3 June. Within each image, lighter gray shades denote multi-year ice, darker gray shades denote first-year ice, and black denotes open water or new ice conditions. TerraSAR-X ice concentration for the early June images within 30 km of the ITP-Vs were 99–100% at all three clusters. Locations of the ITP-V (yellow square centered in each image) and IMBs (red symbols) are indicated. DOI: https://doi.org/10.1525/elementa.241.f6