undef

s1b-ew-grd-hv-20170612t071738-20170612t071842-006014-00a8e0-002_filter

s1b-ew-grd-hh-20170612t071738-20170612t071842-006014-00a8e0-001_filter

s1b-ew-grd-hh-20170612t071738-20170612t071842-006014-00a8e0-001_winddir

s1b-ew-grd-hv-20170612t071738-20170612t071842-006014-00a8e0-002_winddir