undef
s1b-ew-grd-vh-20180911t204855-20180911t204937-012672-017624-002_filter
s1b-ew-grd-vv-20180911t204855-20180911t204937-012672-017624-001_filter
s1b-ew-grd-vh-20180911t204855-20180911t204937-012672-017624-002_winddir
s1b-ew-grd-vv-20180911t204855-20180911t204937-012672-017624-001_winddir