undef

s1b-ew-grd-hh-20170605t122124-20170605t122224-005915-00a5f7-001_filter

s1b-ew-grd-hv-20170605t122124-20170605t122224-005915-00a5f7-002_filter

s1b-ew-grd-hv-20170605t122124-20170605t122224-005915-00a5f7-002_winddir

s1b-ew-grd-hh-20170605t122124-20170605t122224-005915-00a5f7-001_winddir