undef

s1a-ew-grd-vh-20181003t134006-20181003t134110-023972-029e52-002_filter

s1a-ew-grd-vv-20181003t134006-20181003t134110-023972-029e52-001_filter

s1a-ew-grd-vh-20181003t134006-20181003t134110-023972-029e52-002_winddir

s1a-ew-grd-vv-20181003t134006-20181003t134110-023972-029e52-001_winddir