undef

s1a-iw-grd-hh-20150126t071152-20150126t071212-004339-0054af-001_filter

s1a-iw-grd-hv-20150126t071152-20150126t071212-004339-0054af-002_filter

s1a-iw-grd-hv-20150126t071152-20150126t071212-004339-0054af-002_winddir

s1a-iw-grd-hh-20150126t071152-20150126t071212-004339-0054af-001_winddir