undef

s1a-iw-grd-vh-20190929t124248-20190929t124315-029236-03524a-002_filter

s1a-iw-grd-vv-20190929t124248-20190929t124315-029236-03524a-001_filter

s1a-iw-grd-vv-20190929t124248-20190929t124315-029236-03524a-001_winddir

s1a-iw-grd-vh-20190929t124248-20190929t124315-029236-03524a-002_winddir