undef

s1a-iw-grd-vv-20191109t121137-20191109t121206-029834-0366f3-001_filter

s1a-iw-grd-vh-20191109t121137-20191109t121206-029834-0366f3-002_filter

s1a-iw-grd-vh-20191109t121137-20191109t121206-029834-0366f3-002_winddir

s1a-iw-grd-vv-20191109t121137-20191109t121206-029834-0366f3-001_winddir