undef

s1a-ew-grd-hv-20150424t144232-20150424t144247-005627-007355-002_filter

s1a-ew-grd-hh-20150424t144232-20150424t144247-005627-007355-001_filter

s1a-ew-grd-hv-20150424t144232-20150424t144247-005627-007355-002_winddir

s1a-ew-grd-hh-20150424t144232-20150424t144247-005627-007355-001_winddir