undef

s1b-ew-grd-hh-20170530t095320-20170530t095425-005826-00a367-001_filter

s1b-ew-grd-hv-20170530t095320-20170530t095425-005826-00a367-002_filter

s1b-ew-grd-hh-20170530t095320-20170530t095425-005826-00a367-001_winddir

s1b-ew-grd-hv-20170530t095320-20170530t095425-005826-00a367-002_winddir