undef

s1a-iw-grd-vv-20190809t100136-20190809t100201-028491-033873-001_filter

s1a-iw-grd-vh-20190809t100136-20190809t100201-028491-033873-002_filter

s1a-iw-grd-vh-20190809t100136-20190809t100201-028491-033873-002_winddir

s1a-iw-grd-vv-20190809t100136-20190809t100201-028491-033873-001_winddir