undef

s1a-iw-grd-vv-20160627t215223-20160627t215257-011902-012539-001_filter

s1a-iw-grd-vh-20160627t215223-20160627t215257-011902-012539-002_filter

s1a-iw-grd-vv-20160627t215223-20160627t215257-011902-012539-001_winddir

s1a-iw-grd-vh-20160627t215223-20160627t215257-011902-012539-002_winddir