undef

s1b-ew-grd-vv-20180818t204603-20180818t204703-012322-016b56-001_filter

s1b-ew-grd-vh-20180818t204603-20180818t204703-012322-016b56-002_filter

s1b-ew-grd-vv-20180818t204603-20180818t204703-012322-016b56-001_winddir

s1b-ew-grd-vh-20180818t204603-20180818t204703-012322-016b56-002_winddir