undef

s1b-iw-grd-vh-20170608t062104-20170608t062129-005955-00a72c-002_filter

s1b-iw-grd-vv-20170608t062104-20170608t062129-005955-00a72c-001_filter

s1b-iw-grd-vv-20170608t062104-20170608t062129-005955-00a72c-001_winddir

s1b-iw-grd-vh-20170608t062104-20170608t062129-005955-00a72c-002_winddir