undef

s1a-ew-grd-hh-20160703t172622-20160703t172701-011987-0127ea-001_filter

s1a-ew-grd-hv-20160703t172622-20160703t172701-011987-0127ea-002_filter

s1a-ew-grd-hh-20160703t172622-20160703t172701-011987-0127ea-001_winddir

s1a-ew-grd-hv-20160703t172622-20160703t172701-011987-0127ea-002_winddir