Chaff-release time & GPS fix pulled from flight logs for each of the 8 storms.
Radar-tracked storm centroid interpolated every 5 minutes, before and after release.
CLDN lightning strikes within a moving radius of the storm, binned pre/post at 20 / 30 / 50 km.
A nearby, unseeded storm cell matched on distance and time, run through the identical test.
Wilcoxon / Mann–Whitney tests, seeded vs. its own pre-period and vs. the control.