undef

s1b-ew-grd-vh-20190321t201403-20190321t201507-015457-01cf41-002_filter

s1b-ew-grd-vv-20190321t201403-20190321t201507-015457-01cf41-001_filter

s1b-ew-grd-vv-20190321t201403-20190321t201507-015457-01cf41-001_winddir

s1b-ew-grd-vh-20190321t201403-20190321t201507-015457-01cf41-002_winddir