undef

s1a-iw-grd-vh-20190906t224211-20190906t224236-028907-0346ec-002_filter

s1a-iw-grd-vv-20190906t224211-20190906t224236-028907-0346ec-001_filter

s1a-iw-grd-vh-20190906t224211-20190906t224236-028907-0346ec-002_winddir

s1a-iw-grd-vv-20190906t224211-20190906t224236-028907-0346ec-001_winddir