undef

s1a-iw-grd-vh-20150611t175014-20150611t175039-006329-008516-002_filter

s1a-iw-grd-vv-20150611t175014-20150611t175039-006329-008516-001_filter

s1a-iw-grd-vh-20150611t175014-20150611t175039-006329-008516-002_winddir

s1a-iw-grd-vv-20150611t175014-20150611t175039-006329-008516-001_winddir