undef

s1b-ew-grd-hh-20170807t160307-20170807t160412-006836-00c082-001_filter

s1b-ew-grd-hv-20170807t160307-20170807t160412-006836-00c082-002_filter

s1b-ew-grd-hh-20170807t160307-20170807t160412-006836-00c082-001_winddir

s1b-ew-grd-hv-20170807t160307-20170807t160412-006836-00c082-002_winddir