undef

s1b-iw-grd-vh-20170314t174939-20170314t175004-004708-008375-002_filter

s1b-iw-grd-vv-20170314t174939-20170314t175004-004708-008375-001_filter

s1b-iw-grd-vv-20170314t174939-20170314t175004-004708-008375-001_winddir

s1b-iw-grd-vh-20170314t174939-20170314t175004-004708-008375-002_winddir