undef

s1b-iw-grd-vv-20181010t233653-20181010t233718-013097-01832e-001_filter

s1b-iw-grd-vh-20181010t233653-20181010t233718-013097-01832e-002_filter

s1b-iw-grd-vv-20181010t233653-20181010t233718-013097-01832e-001_winddir

s1b-iw-grd-vh-20181010t233653-20181010t233718-013097-01832e-002_winddir