undef

s1b-ew-grd-hv-20170809t105119-20170809t105219-006862-00c143-002_filter

s1b-ew-grd-hh-20170809t105119-20170809t105219-006862-00c143-001_filter

s1b-ew-grd-hv-20170809t105119-20170809t105219-006862-00c143-002_winddir

s1b-ew-grd-hh-20170809t105119-20170809t105219-006862-00c143-001_winddir