undef

s1b-ew-grd-vv-20181027t210412-20181027t210442-013343-018ac3-001_filter

s1b-ew-grd-vh-20181027t210412-20181027t210442-013343-018ac3-002_filter

s1b-ew-grd-vh-20181027t210412-20181027t210442-013343-018ac3-002_winddir

s1b-ew-grd-vv-20181027t210412-20181027t210442-013343-018ac3-001_winddir