undef

s1a-iw-grd-vh-20151005t100027-20151005t100056-008016-00b389-002_filter

s1a-iw-grd-vv-20151005t100027-20151005t100056-008016-00b389-001_filter

s1a-iw-grd-vv-20151005t100027-20151005t100056-008016-00b389-001_winddir

s1a-iw-grd-vh-20151005t100027-20151005t100056-008016-00b389-002_winddir