undef

s1b-ew-grd-vv-20180901t032311-20180901t032411-012516-01715c-001_filter

s1b-ew-grd-vh-20180901t032311-20180901t032411-012516-01715c-002_filter

s1b-ew-grd-vh-20180901t032311-20180901t032411-012516-01715c-002_winddir

s1b-ew-grd-vv-20180901t032311-20180901t032411-012516-01715c-001_winddir