undef

s1a-iw-grd-vv-20151115t100924-20151115t100949-008614-00c3a4-001_filter

s1a-iw-grd-vh-20151115t100924-20151115t100949-008614-00c3a4-002_filter

s1a-iw-grd-vv-20151115t100924-20151115t100949-008614-00c3a4-001_winddir

s1a-iw-grd-vh-20151115t100924-20151115t100949-008614-00c3a4-002_winddir