undef

s1b-ew-grd-hh-20170712t094512-20170712t094616-006453-00b586-001_filter

s1b-ew-grd-hv-20170712t094512-20170712t094616-006453-00b586-002_filter

s1b-ew-grd-hh-20170712t094512-20170712t094616-006453-00b586-001_winddir

s1b-ew-grd-hv-20170712t094512-20170712t094616-006453-00b586-002_winddir