undef

s1b-ew-grd-vh-20180303t150105-20180303t150205-009868-011da1-002_filter

s1b-ew-grd-vv-20180303t150105-20180303t150205-009868-011da1-001_filter

s1b-ew-grd-vh-20180303t150105-20180303t150205-009868-011da1-002_winddir

s1b-ew-grd-vv-20180303t150105-20180303t150205-009868-011da1-001_winddir