undef

s1a-iw-grd-vv-20151011t062144-20151011t062209-008101-00b5be-001_filter

s1a-iw-grd-vh-20151011t062144-20151011t062209-008101-00b5be-002_filter

s1a-iw-grd-vv-20151011t062144-20151011t062209-008101-00b5be-001_winddir

s1a-iw-grd-vh-20151011t062144-20151011t062209-008101-00b5be-002_winddir