undef

s1a-iw-grd-vv-20180807t203547-20180807t203609-023145-02839f-001_filter

s1a-iw-grd-vh-20180807t203547-20180807t203609-023145-02839f-002_filter

s1a-iw-grd-vh-20180807t203547-20180807t203609-023145-02839f-002_winddir

s1a-iw-grd-vv-20180807t203547-20180807t203609-023145-02839f-001_winddir