undef

s1a-iw-grd-vv-20200902t235902-20200902t235927-034187-03f8bd-001_filter

s1a-iw-grd-vh-20200902t235902-20200902t235927-034187-03f8bd-002_filter

s1a-iw-grd-vv-20200902t235902-20200902t235927-034187-03f8bd-001_winddir

s1a-iw-grd-vh-20200902t235902-20200902t235927-034187-03f8bd-002_winddir