undef

s1b-ew-grd-hv-20170808t101122-20170808t101222-006847-00c0d6-002_filter

s1b-ew-grd-hh-20170808t101122-20170808t101222-006847-00c0d6-001_filter

s1b-ew-grd-hh-20170808t101122-20170808t101222-006847-00c0d6-001_winddir

s1b-ew-grd-hv-20170808t101122-20170808t101222-006847-00c0d6-002_winddir