undef

s1a-iw-grd-vv-20150711t101651-20150711t101720-006762-009129-001_filter

s1a-iw-grd-vh-20150711t101651-20150711t101720-006762-009129-002_filter

s1a-iw-grd-vh-20150711t101651-20150711t101720-006762-009129-002_winddir

s1a-iw-grd-vv-20150711t101651-20150711t101720-006762-009129-001_winddir