undef

s1a-ew-grd-vh-20160829t203614-20160829t203714-012820-01437e-002_filter

s1a-ew-grd-vv-20160829t203614-20160829t203714-012820-01437e-001_filter

s1a-ew-grd-vh-20160829t203614-20160829t203714-012820-01437e-002_winddir

s1a-ew-grd-vv-20160829t203614-20160829t203714-012820-01437e-001_winddir