undef

s1a-ew-grd-vh-20180724t205502-20180724t205606-022941-027d46-002_filter

s1a-ew-grd-vv-20180724t205502-20180724t205606-022941-027d46-001_filter

s1a-ew-grd-vh-20180724t205502-20180724t205606-022941-027d46-002_winddir

s1a-ew-grd-vv-20180724t205502-20180724t205606-022941-027d46-001_winddir