undef

s1a-iw-grd-vv-20180407t205117-20180407t205142-021366-024c75-001_filter

s1a-iw-grd-vh-20180407t205117-20180407t205142-021366-024c75-002_filter

s1a-iw-grd-vh-20180407t205117-20180407t205142-021366-024c75-002_winddir

s1a-iw-grd-vv-20180407t205117-20180407t205142-021366-024c75-001_winddir