undef

s1b-ew-grd-vh-20180911t204751-20180911t204855-012672-017624-002_filter

s1b-ew-grd-vv-20180911t204751-20180911t204855-012672-017624-001_filter

s1b-ew-grd-vv-20180911t204751-20180911t204855-012672-017624-001_winddir

s1b-ew-grd-vh-20180911t204751-20180911t204855-012672-017624-002_winddir