undef
s1b-ew-grd-vh-20180810t165606-20180810t165710-012203-0167b7-002_filter
s1b-ew-grd-vv-20180810t165606-20180810t165710-012203-0167b7-001_filter
s1b-ew-grd-vh-20180810t165606-20180810t165710-012203-0167b7-002_winddir
s1b-ew-grd-vv-20180810t165606-20180810t165710-012203-0167b7-001_winddir