undef

s1a-iw-grd-hh-20150304t061430-20150304t061500-004878-006148-001_filter

s1a-iw-grd-hv-20150304t061430-20150304t061500-004878-006148-002_filter

s1a-iw-grd-hv-20150304t061430-20150304t061500-004878-006148-002_winddir

s1a-iw-grd-hh-20150304t061430-20150304t061500-004878-006148-001_winddir