undef

s1b-iw-grd-vh-20180211t215120-20180211t215149-009581-01142f-002_filter

s1b-iw-grd-vv-20180211t215120-20180211t215149-009581-01142f-001_filter

s1b-iw-grd-vh-20180211t215120-20180211t215149-009581-01142f-002_winddir

s1b-iw-grd-vv-20180211t215120-20180211t215149-009581-01142f-001_winddir