undef
s1b-ew-grd-vv-20180927t012700-20180927t012804-012894-017cfc-001_filter
s1b-ew-grd-vh-20180927t012700-20180927t012804-012894-017cfc-002_filter
s1b-ew-grd-vh-20180927t012700-20180927t012804-012894-017cfc-002_winddir
s1b-ew-grd-vv-20180927t012700-20180927t012804-012894-017cfc-001_winddir