undef

s1b-ew-grd-hv-20170802t105930-20170802t110030-006760-00be54-002_filter

s1b-ew-grd-hh-20170802t105930-20170802t110030-006760-00be54-001_filter

s1b-ew-grd-hv-20170802t105930-20170802t110030-006760-00be54-002_winddir

s1b-ew-grd-hh-20170802t105930-20170802t110030-006760-00be54-001_winddir