undef

s1a-ew-grd-vh-20160915t141123-20160915t141227-013064-014b66-002_filter

s1a-ew-grd-vv-20160915t141123-20160915t141227-013064-014b66-001_filter

s1a-ew-grd-vh-20160915t141123-20160915t141227-013064-014b66-002_winddir

s1a-ew-grd-vv-20160915t141123-20160915t141227-013064-014b66-001_winddir