undef
s1b-ew-grd-vh-20180208t001705-20180208t001805-009524-011249-002_filter
s1b-ew-grd-vv-20180208t001705-20180208t001805-009524-011249-001_filter
s1b-ew-grd-vv-20180208t001705-20180208t001805-009524-011249-001_winddir
s1b-ew-grd-vh-20180208t001705-20180208t001805-009524-011249-002_winddir