undef

s1a-ew-grd-vh-20160825t210916-20160825t211020-012762-014199-002_filter

s1a-ew-grd-vv-20160825t210916-20160825t211020-012762-014199-001_filter

s1a-ew-grd-vv-20160825t210916-20160825t211020-012762-014199-001_winddir

s1a-ew-grd-vh-20160825t210916-20160825t211020-012762-014199-002_winddir