undef

s1b-ew-grd-hh-20170801t165213-20170801t165317-006749-00be02-001_filter

s1b-ew-grd-hv-20170801t165213-20170801t165317-006749-00be02-002_filter

s1b-ew-grd-hv-20170801t165213-20170801t165317-006749-00be02-002_winddir

s1b-ew-grd-hh-20170801t165213-20170801t165317-006749-00be02-001_winddir