undef

s1a-ew-grd-vv-20190930t210103-20190930t210142-029256-0352f9-001_filter

s1a-ew-grd-vh-20190930t210103-20190930t210142-029256-0352f9-002_filter

s1a-ew-grd-vv-20190930t210103-20190930t210142-029256-0352f9-001_winddir

s1a-ew-grd-vh-20190930t210103-20190930t210142-029256-0352f9-002_winddir