undef

s1a-iw-grd-vh-20180823t093905-20180823t093934-023372-028aed-002_filter

s1a-iw-grd-vv-20180823t093905-20180823t093934-023372-028aed-001_filter

s1a-iw-grd-vh-20180823t093905-20180823t093934-023372-028aed-002_winddir

s1a-iw-grd-vv-20180823t093905-20180823t093934-023372-028aed-001_winddir