undef

s1a-iw-grd-vh-20180712t102736-20180712t102801-022760-027786-002_filter

s1a-iw-grd-vv-20180712t102736-20180712t102801-022760-027786-001_filter

s1a-iw-grd-vh-20180712t102736-20180712t102801-022760-027786-002_winddir

s1a-iw-grd-vv-20180712t102736-20180712t102801-022760-027786-001_winddir