undef

s1b-ew-grd-vv-20180820t153504-20180820t153604-012348-016c38-001_filter

s1b-ew-grd-vh-20180820t153504-20180820t153604-012348-016c38-002_filter

s1b-ew-grd-vv-20180820t153504-20180820t153604-012348-016c38-001_winddir

s1b-ew-grd-vh-20180820t153504-20180820t153604-012348-016c38-002_winddir