undef

s1b-ew-grd-vh-20180207t131831-20180207t131931-009517-01120c-002_filter

s1b-ew-grd-vv-20180207t131831-20180207t131931-009517-01120c-001_filter

s1b-ew-grd-vh-20180207t131831-20180207t131931-009517-01120c-002_winddir

s1b-ew-grd-vv-20180207t131831-20180207t131931-009517-01120c-001_winddir