undef

s1b-ew-grd-hv-20170715t083117-20170715t083221-006496-00b6c5-002_filter

s1b-ew-grd-hh-20170715t083117-20170715t083221-006496-00b6c5-001_filter

s1b-ew-grd-hh-20170715t083117-20170715t083221-006496-00b6c5-001_winddir

s1b-ew-grd-hv-20170715t083117-20170715t083221-006496-00b6c5-002_winddir