undef

s1a-iw-grd-vh-20151029t100027-20151029t100056-008366-00bcf8-002_filter

s1a-iw-grd-vv-20151029t100027-20151029t100056-008366-00bcf8-001_filter

s1a-iw-grd-vh-20151029t100027-20151029t100056-008366-00bcf8-002_winddir

s1a-iw-grd-vv-20151029t100027-20151029t100056-008366-00bcf8-001_winddir