undef

s1a-iw-grd-hv-20150125t063248-20150125t063307-004324-005457-002_filter

s1a-iw-grd-hh-20150125t063248-20150125t063307-004324-005457-001_filter

s1a-iw-grd-hv-20150125t063248-20150125t063307-004324-005457-002_winddir

s1a-iw-grd-hh-20150125t063248-20150125t063307-004324-005457-001_winddir