undef

s1a-ew-grd-vv-20180830t195908-20180830t200009-023480-028e64-001_filter

s1a-ew-grd-vh-20180830t195908-20180830t200009-023480-028e64-002_filter

s1a-ew-grd-vh-20180830t195908-20180830t200009-023480-028e64-002_winddir

s1a-ew-grd-vv-20180830t195908-20180830t200009-023480-028e64-001_winddir