undef

s1b-iw-grd-vv-20181103t184809-20181103t184834-013444-018dfe-001_filter

s1b-iw-grd-vh-20181103t184809-20181103t184834-013444-018dfe-002_filter

s1b-iw-grd-vh-20181103t184809-20181103t184834-013444-018dfe-002_winddir

s1b-iw-grd-vv-20181103t184809-20181103t184834-013444-018dfe-001_winddir