undef

s1b-ew-grd-hv-20170622t154642-20170622t154746-006165-00ad4b-002_filter

s1b-ew-grd-hh-20170622t154642-20170622t154746-006165-00ad4b-001_filter

s1b-ew-grd-hv-20170622t154642-20170622t154746-006165-00ad4b-002_winddir

s1b-ew-grd-hh-20170622t154642-20170622t154746-006165-00ad4b-001_winddir