undef

s1b-ew-grd-hh-20170722t082312-20170722t082416-006598-00b9ac-001_filter

s1b-ew-grd-hv-20170722t082312-20170722t082416-006598-00b9ac-002_filter

s1b-ew-grd-hv-20170722t082312-20170722t082416-006598-00b9ac-002_winddir

s1b-ew-grd-hh-20170722t082312-20170722t082416-006598-00b9ac-001_winddir