undef

s1b-iw-grd-vh-20170919t142946-20170919t143011-007462-00d2c2-002_filter

s1b-iw-grd-vv-20170919t142946-20170919t143011-007462-00d2c2-001_filter

s1b-iw-grd-vh-20170919t142946-20170919t143011-007462-00d2c2-002_winddir

s1b-iw-grd-vv-20170919t142946-20170919t143011-007462-00d2c2-001_winddir