undef

s1b-ew-grd-hv-20170710t163549-20170710t163652-006428-00b4cf-002_filter

s1b-ew-grd-hh-20170710t163549-20170710t163652-006428-00b4cf-001_filter

s1b-ew-grd-hv-20170710t163549-20170710t163652-006428-00b4cf-002_winddir

s1b-ew-grd-hh-20170710t163549-20170710t163652-006428-00b4cf-001_winddir