undef

s1b-ew-grd-vh-20180902t143812-20180902t143912-012537-01720f-002_filter

s1b-ew-grd-vv-20180902t143812-20180902t143912-012537-01720f-001_filter

s1b-ew-grd-vv-20180902t143812-20180902t143912-012537-01720f-001_winddir

s1b-ew-grd-vh-20180902t143812-20180902t143912-012537-01720f-002_winddir