undef

s1b-ew-grd-hv-20170724t094617-20170724t094717-006628-00ba83-002_filter

s1b-ew-grd-hh-20170724t094617-20170724t094717-006628-00ba83-001_filter

s1b-ew-grd-hh-20170724t094617-20170724t094717-006628-00ba83-001_winddir

s1b-ew-grd-hv-20170724t094617-20170724t094717-006628-00ba83-002_winddir