undef

s1a-ew-grd-vv-20181004t020906-20181004t021011-023980-029e91-001_filter

s1a-ew-grd-vh-20181004t020906-20181004t021011-023980-029e91-002_filter

s1a-ew-grd-vh-20181004t020906-20181004t021011-023980-029e91-002_winddir

s1a-ew-grd-vv-20181004t020906-20181004t021011-023980-029e91-001_winddir