undef
s1b-ew-grd-vh-20180829t075408-20180829t075512-012475-017011-002_filter
s1b-ew-grd-vv-20180829t075408-20180829t075512-012475-017011-001_filter
s1b-ew-grd-vh-20180829t075408-20180829t075512-012475-017011-002_winddir
s1b-ew-grd-vv-20180829t075408-20180829t075512-012475-017011-001_winddir