undef

s1a-ew-grd-vh-20181222t132319-20181222t132419-025138-02c6b3-002_filter

s1a-ew-grd-vv-20181222t132319-20181222t132419-025138-02c6b3-001_filter

s1a-ew-grd-vv-20181222t132319-20181222t132419-025138-02c6b3-001_winddir

s1a-ew-grd-vh-20181222t132319-20181222t132419-025138-02c6b3-002_winddir