undef
s1b-iw-grd-vv-20190314t160736-20190314t160801-015352-01cbee-001_filter
s1b-iw-grd-vh-20190314t160736-20190314t160801-015352-01cbee-002_filter
s1b-iw-grd-vv-20190314t160736-20190314t160801-015352-01cbee-001_winddir
s1b-iw-grd-vh-20190314t160736-20190314t160801-015352-01cbee-002_winddir