undef

s1a-iw-grd-vh-20190912t025058-20190912t025123-028982-034983-002_filter

s1a-iw-grd-vv-20190912t025058-20190912t025123-028982-034983-001_filter

s1a-iw-grd-vv-20190912t025058-20190912t025123-028982-034983-001_winddir

s1a-iw-grd-vh-20190912t025058-20190912t025123-028982-034983-002_winddir