undef

s1a-ew-grd-hv-20160730t075911-20160730t080015-012375-01349f-002_filter

s1a-ew-grd-hh-20160730t075911-20160730t080015-012375-01349f-001_filter

s1a-ew-grd-hv-20160730t075911-20160730t080015-012375-01349f-002_winddir

s1a-ew-grd-hh-20160730t075911-20160730t080015-012375-01349f-001_winddir