undef

s1b-ew-grd-vh-20180905t205709-20180905t205813-012585-017384-002_filter

s1b-ew-grd-vv-20180905t205709-20180905t205813-012585-017384-001_filter

s1b-ew-grd-vh-20180905t205709-20180905t205813-012585-017384-002_winddir

s1b-ew-grd-vv-20180905t205709-20180905t205813-012585-017384-001_winddir