undef

s1b-iw-grd-vv-20180727t100044-20180727t100102-011995-01614d-001_filter

s1b-iw-grd-vh-20180727t100044-20180727t100102-011995-01614d-002_filter

s1b-iw-grd-vv-20180727t100044-20180727t100102-011995-01614d-001_winddir

s1b-iw-grd-vh-20180727t100044-20180727t100102-011995-01614d-002_winddir