undef

s1b-ew-grd-vv-20180727t202558-20180727t202702-012001-016188-001_filter

s1b-ew-grd-vh-20180727t202558-20180727t202702-012001-016188-002_filter

s1b-ew-grd-vv-20180727t202558-20180727t202702-012001-016188-001_winddir

s1b-ew-grd-vh-20180727t202558-20180727t202702-012001-016188-002_winddir