undef

s1a-iw-grd-vv-20190912t024614-20190912t024639-028982-034982-001_filter

s1a-iw-grd-vh-20190912t024614-20190912t024639-028982-034982-002_filter

s1a-iw-grd-vh-20190912t024614-20190912t024639-028982-034982-002_winddir

s1a-iw-grd-vv-20190912t024614-20190912t024639-028982-034982-001_winddir