undef

s1a-ew-grd-hv-20150925t131952-20150925t132052-007872-00afa1-002_filter

s1a-ew-grd-hh-20150925t131952-20150925t132052-007872-00afa1-001_filter

s1a-ew-grd-hv-20150925t131952-20150925t132052-007872-00afa1-002_winddir

s1a-ew-grd-hh-20150925t131952-20150925t132052-007872-00afa1-001_winddir