undef

s1a-ew-grd-vv-20160924t102739-20160924t102839-013193-014fc1-001_filter

s1a-ew-grd-vh-20160924t102739-20160924t102839-013193-014fc1-002_filter

s1a-ew-grd-vv-20160924t102739-20160924t102839-013193-014fc1-001_winddir

s1a-ew-grd-vh-20160924t102739-20160924t102839-013193-014fc1-002_winddir