undef

s1a-ew-grd-vh-20180726t203708-20180726t203808-022970-027e26-002_filter

s1a-ew-grd-vv-20180726t203708-20180726t203808-022970-027e26-001_filter

s1a-ew-grd-vv-20180726t203708-20180726t203808-022970-027e26-001_winddir

s1a-ew-grd-vh-20180726t203708-20180726t203808-022970-027e26-002_winddir