undef

s1b-ew-grd-vv-20180727t082211-20180727t082311-011994-016145-001_filter

s1b-ew-grd-vh-20180727t082211-20180727t082311-011994-016145-002_filter

s1b-ew-grd-vv-20180727t082211-20180727t082311-011994-016145-001_winddir

s1b-ew-grd-vh-20180727t082211-20180727t082311-011994-016145-002_winddir