undef

s1b-ew-grd-vh-20180208t001501-20180208t001605-009524-011249-002_filter

s1b-ew-grd-vv-20180208t001501-20180208t001605-009524-011249-001_filter

s1b-ew-grd-vv-20180208t001501-20180208t001605-009524-011249-001_winddir

s1b-ew-grd-vh-20180208t001501-20180208t001605-009524-011249-002_winddir