IF (useZONAL_FILT .AND. zonal_filt_uvStar) THEN
LOGICAL zonal_filt_uvStar, zonal_filt_TrStagg
& zonal_filt_uvStar, zonal_filt_TrStagg
& zonal_filt_uvStar, zonal_filt_TrStagg,
zonal_filt_uvStar = .TRUE.
IF ( .NOT.zonal_filt_uvStar ) THEN