undef

s1a-iw-grd-vv-20170216t031007-20170216t031034-015303-019162-001_filter

s1a-iw-grd-vh-20170216t031007-20170216t031034-015303-019162-002_filter

s1a-iw-grd-vh-20170216t031007-20170216t031034-015303-019162-002_winddir

s1a-iw-grd-vv-20170216t031007-20170216t031034-015303-019162-001_winddir