Outer band edge (high) — a high percentile, not the raw max.
Outer band edge (low) — a low percentile, not the raw min. NaN if empty.
Inner band edge (high) — the 75th percentile (the typical-range ceiling).
Inner band edge (low) — the 25th percentile (the typical-range floor).
Median of the raw samples in the bucket — robust to anomalies.
A
(distance, value)sample on a distance-domain channel profile.