undef

s1a-ew-grd-vv-20160827t092228-20160827t092328-012784-014249-001_filter

s1a-ew-grd-vh-20160827t092228-20160827t092328-012784-014249-002_filter

s1a-ew-grd-vh-20160827t092228-20160827t092328-012784-014249-002_winddir

s1a-ew-grd-vv-20160827t092228-20160827t092328-012784-014249-001_winddir