undef

s1b-ew-grd-hh-20170712t094616-20170712t094716-006453-00b586-001_filter

s1b-ew-grd-hv-20170712t094616-20170712t094716-006453-00b586-002_filter

s1b-ew-grd-hv-20170712t094616-20170712t094716-006453-00b586-002_winddir

s1b-ew-grd-hh-20170712t094616-20170712t094716-006453-00b586-001_winddir