{"captures":["2026-10-06T0517Z-17451-xpb1-0520","2026-10-03T0519Z-17451-xpb1-0520","2026-10-02T0519Z-17451-xpb1-0520","2026-09-26T0518Z-17451-xpb1-0520","2026-09-25T0517Z-17451-xpb1-0520","2026-09-22T0517Z-17451-xpb1-0520","2026-09-21T0517Z-17451-xpb1-0520"],"freqs_khz":[17451.0],"kind":"","name":"XPB1 polytone ladder, 05:20 step","slug":"xpb1-0520","tier":"B"}