undef

s1a-ew-grd-vh-20190904t134036-20190904t134121-028872-0345b8-002_filter

s1a-ew-grd-vv-20190904t134036-20190904t134121-028872-0345b8-001_filter

s1a-ew-grd-vv-20190904t134036-20190904t134121-028872-0345b8-001_winddir

s1a-ew-grd-vh-20190904t134036-20190904t134121-028872-0345b8-002_winddir