undef

s1a-ew-grd-vv-20180201t132323-20180201t132423-020413-022e2f-001_filter

s1a-ew-grd-vh-20180201t132323-20180201t132423-020413-022e2f-002_filter

s1a-ew-grd-vh-20180201t132323-20180201t132423-020413-022e2f-002_winddir

s1a-ew-grd-vv-20180201t132323-20180201t132423-020413-022e2f-001_winddir