undef
s1a-iw-grd-vv-20201103t234046-20201103t234111-035091-04184a-001_filter
s1a-iw-grd-vh-20201103t234046-20201103t234111-035091-04184a-002_filter
s1a-iw-grd-vh-20201103t234046-20201103t234111-035091-04184a-002_winddir
s1a-iw-grd-vv-20201103t234046-20201103t234111-035091-04184a-001_winddir