Examples
wvrgcal(vis='uid___A002_X1d54a1_X5.ms', caltable='cal-wvr-uid___A002_X1d54a1_X5.W',toffset=-1, segsource=True, tie=['Titan,1037-295,NGC3256'], statsource='1037-295')
wvrgcal(vis='uid___A002_X1d54a1_X5.ms', caltable='cal-wvr-uid___A002_X1d54a1_X5.W',toffset=-1, segsource=True, tie=['Titan,1037-295,NGC3256'], statsource='1037-295')