undef
s1b-ew-grd-vv-20180728t210603-20180728t210708-012016-0161f6-001_filter
s1b-ew-grd-vh-20180728t210603-20180728t210708-012016-0161f6-002_filter
s1b-ew-grd-vv-20180728t210603-20180728t210708-012016-0161f6-001_winddir
s1b-ew-grd-vh-20180728t210603-20180728t210708-012016-0161f6-002_winddir