undef

s1a-ew-grd-hh-20151205t092149-20151205t092254-008905-00cbd9-001_filter

s1a-ew-grd-hv-20151205t092149-20151205t092254-008905-00cbd9-002_filter

s1a-ew-grd-hv-20151205t092149-20151205t092254-008905-00cbd9-002_winddir

s1a-ew-grd-hh-20151205t092149-20151205t092254-008905-00cbd9-001_winddir