undef

s1a-iw-grd-vh-20160510t215152-20160510t215221-011202-010ed4-002_filter

s1a-iw-grd-vv-20160510t215152-20160510t215221-011202-010ed4-001_filter

s1a-iw-grd-vv-20160510t215152-20160510t215221-011202-010ed4-001_winddir

s1a-iw-grd-vh-20160510t215152-20160510t215221-011202-010ed4-002_winddir