undef

s1a-ew-grd-vv-20160920t092427-20160920t092527-013134-014dc9-001_filter

s1a-ew-grd-vh-20160920t092427-20160920t092527-013134-014dc9-002_filter

s1a-ew-grd-vv-20160920t092427-20160920t092527-013134-014dc9-001_winddir

s1a-ew-grd-vh-20160920t092427-20160920t092527-013134-014dc9-002_winddir