undef

s1b-ew-grd-hh-20170715t101120-20170715t101220-006497-00b6cc-001_filter

s1b-ew-grd-hv-20170715t101120-20170715t101220-006497-00b6cc-002_filter

s1b-ew-grd-hh-20170715t101120-20170715t101220-006497-00b6cc-001_winddir

s1b-ew-grd-hv-20170715t101120-20170715t101220-006497-00b6cc-002_winddir