undef

s1a-ew-grd-hh-20151011t174140-20151011t174240-008108-00b5e7-001_filter

s1a-ew-grd-hv-20151011t174140-20151011t174240-008108-00b5e7-002_filter

s1a-ew-grd-hh-20151011t174140-20151011t174240-008108-00b5e7-001_winddir

s1a-ew-grd-hv-20151011t174140-20151011t174240-008108-00b5e7-002_winddir