undef

s1b-ew-grd-hh-20170714t110841-20170714t110941-006483-00b663-001_filter

s1b-ew-grd-hv-20170714t110841-20170714t110941-006483-00b663-002_filter

s1b-ew-grd-hh-20170714t110841-20170714t110941-006483-00b663-001_winddir

s1b-ew-grd-hv-20170714t110841-20170714t110941-006483-00b663-002_winddir