undef

s1b-ew-grd-vv-20180830t033808-20180830t033913-012487-017077-001_filter

s1b-ew-grd-vh-20180830t033808-20180830t033913-012487-017077-002_filter

s1b-ew-grd-vv-20180830t033808-20180830t033913-012487-017077-001_winddir

s1b-ew-grd-vh-20180830t033808-20180830t033913-012487-017077-002_winddir