undef

s1a-ew-grd-vv-20191231t144416-20191231t144520-030593-03813d-001_filter

s1a-ew-grd-vh-20191231t144416-20191231t144520-030593-03813d-002_filter

s1a-ew-grd-vh-20191231t144416-20191231t144520-030593-03813d-002_winddir

s1a-ew-grd-vv-20191231t144416-20191231t144520-030593-03813d-001_winddir