undef

s1a-ew-grd-vv-20160830t144616-20160830t144658-012831-0143db-001_filter

s1a-ew-grd-vh-20160830t144616-20160830t144658-012831-0143db-002_filter

s1a-ew-grd-vh-20160830t144616-20160830t144658-012831-0143db-002_winddir

s1a-ew-grd-vv-20160830t144616-20160830t144658-012831-0143db-001_winddir