WCSim Validation

a08d79a27f5f3fbc6da77a831e80db1bdfb4aa7f

Pull Request #520: Update LI code, better sampling

SK_5MeVem_centre_xdir

Tests
163.06 sec
wcsimrootevent plot pass
wcsimrootevent2 plot pass
wcsimrootevent_OD plot pass
Geom pass
bad pass
Geometry warnings pass