undef

s1a-ew-grd-vv-20180807t083208-20180807t083308-023138-028367-001_filter

s1a-ew-grd-vh-20180807t083208-20180807t083308-023138-028367-002_filter

s1a-ew-grd-vv-20180807t083208-20180807t083308-023138-028367-001_winddir

s1a-ew-grd-vh-20180807t083208-20180807t083308-023138-028367-002_winddir