WCSim Validation

ad388e1d1a09864b952e6982a0d1243cab4ecc2a

Pull Request #486: Fixes bug in OD PMT orientation

SK_500MeVem_centre_xdir

Tests
3216.03 sec
wcsimrootevent plot pass
wcsimrootevent2 plot pass
wcsimrootevent_OD plot pass
Geom pass
bad pass
Geometry warnings pass