undef

s1a-iw-grd-vv-20150709t103312-20150709t103341-006733-009049-001_filter

s1a-iw-grd-vh-20150709t103312-20150709t103341-006733-009049-002_filter

s1a-iw-grd-vh-20150709t103312-20150709t103341-006733-009049-002_winddir

s1a-iw-grd-vv-20150709t103312-20150709t103341-006733-009049-001_winddir