undef

s1a-ew-grd-vh-20180819t033203-20180819t033303-023310-0288f7-002_filter

s1a-ew-grd-vv-20180819t033203-20180819t033303-023310-0288f7-001_filter

s1a-ew-grd-vh-20180819t033203-20180819t033303-023310-0288f7-002_winddir

s1a-ew-grd-vv-20180819t033203-20180819t033303-023310-0288f7-001_winddir