undef

s1b-ew-grd-hh-20170722t114030-20170722t114130-006600-00b9bb-001_filter

s1b-ew-grd-hv-20170722t114030-20170722t114130-006600-00b9bb-002_filter

s1b-ew-grd-hh-20170722t114030-20170722t114130-006600-00b9bb-001_winddir

s1b-ew-grd-hv-20170722t114030-20170722t114130-006600-00b9bb-002_winddir