undef
s1b-ew-grd-vv-20180120t020505-20180120t020607-009248-01093d-001_filter
s1b-ew-grd-vh-20180120t020505-20180120t020607-009248-01093d-002_filter
s1b-ew-grd-vv-20180120t020505-20180120t020607-009248-01093d-001_winddir
s1b-ew-grd-vh-20180120t020505-20180120t020607-009248-01093d-002_winddir