undef

s1a-ew-grd-vv-20160915t141327-20160915t141434-013064-014b66-001_filter

s1a-ew-grd-vh-20160915t141327-20160915t141434-013064-014b66-002_filter

s1a-ew-grd-vh-20160915t141327-20160915t141434-013064-014b66-002_winddir

s1a-ew-grd-vv-20160915t141327-20160915t141434-013064-014b66-001_winddir