undef

s1b-ew-grd-vh-20180106t021946-20180106t022046-009044-010298-002_filter

s1b-ew-grd-vv-20180106t021946-20180106t022046-009044-010298-001_filter

s1b-ew-grd-vh-20180106t021946-20180106t022046-009044-010298-002_winddir

s1b-ew-grd-vv-20180106t021946-20180106t022046-009044-010298-001_winddir