undef

s1a-iw-grd-vv-20150619t100117-20150619t100142-006441-008853-001_filter

s1a-iw-grd-vh-20150619t100117-20150619t100142-006441-008853-002_filter

s1a-iw-grd-vv-20150619t100117-20150619t100142-006441-008853-001_winddir

s1a-iw-grd-vh-20150619t100117-20150619t100142-006441-008853-002_winddir