undef
s1a-iw-grd-vv-20211026t164753-20211026t164818-040293-04c642-001_filter
s1a-iw-grd-vh-20211026t164753-20211026t164818-040293-04c642-002_filter
s1a-iw-grd-vh-20211026t164753-20211026t164818-040293-04c642-002_winddir
s1a-iw-grd-vv-20211026t164753-20211026t164818-040293-04c642-001_winddir