Fig. 2

The LOS map for the original SID, and each cluster, i.e., \({\varvec{o}}_{{\varvec{i}}}\) in Eq. (4) for solution A (12 × 8 × 6 × 25), solution B (24 × 16 × 12 × 50), solution C (36 × 24 × 18 × 75), and solution D (48 × 32 × 24 × 100)