Warehouse Rack & Structural Geometry Drift Watch

Steel racking is the biggest reflector of WiFi waves in a warehouse, so the signal map is really a map of the racks. If an upright shifts by even a few centimetres, its reflection moves and the map changes at that spot. A forklift impact also shows as a sharp jolt at a known place and time.

In the physics: Racking and structural steel are the dominant scatterers in a warehouse RF field. A few cm of upright displacement or beam deflection moves specular reflection points, changing super-resolved multipath delays (cm-scale = sub-ns delay shifts, resolvable via sparse recovery) and the static CIR fingerprint — a pure geometry observable with zero Doppler content. Forklift impact events additionally show as a step change rather than drift.