undef

s1a-ew-grd-hv-20160705t153107-20160705t153209-012015-0128d3-002_filter

s1a-ew-grd-hh-20160705t153107-20160705t153209-012015-0128d3-001_filter

s1a-ew-grd-hv-20160705t153107-20160705t153209-012015-0128d3-002_winddir

s1a-ew-grd-hh-20160705t153107-20160705t153209-012015-0128d3-001_winddir