undef

s1a-ew-grd-vv-20170213t024501-20170213t024553-015259-019008-001_filter

s1a-ew-grd-vh-20170213t024501-20170213t024553-015259-019008-002_filter

s1a-ew-grd-vv-20170213t024501-20170213t024553-015259-019008-001_winddir

s1a-ew-grd-vh-20170213t024501-20170213t024553-015259-019008-002_winddir