undef

s1b-ew-grd-hh-20170619t120502-20170619t120602-006119-00abfd-001_filter

s1b-ew-grd-hv-20170619t120502-20170619t120602-006119-00abfd-002_filter

s1b-ew-grd-hh-20170619t120502-20170619t120602-006119-00abfd-001_winddir

s1b-ew-grd-hv-20170619t120502-20170619t120602-006119-00abfd-002_winddir