undef

s1b-ew-grd-hh-20170609t101018-20170609t101118-005972-00a7ae-001_filter

s1b-ew-grd-hv-20170609t101018-20170609t101118-005972-00a7ae-002_filter

s1b-ew-grd-hv-20170609t101018-20170609t101118-005972-00a7ae-002_winddir

s1b-ew-grd-hh-20170609t101018-20170609t101118-005972-00a7ae-001_winddir