undef

s1a-ew-grd-vh-20180203t130730-20180203t130830-020442-022f35-002_filter

s1a-ew-grd-vv-20180203t130730-20180203t130830-020442-022f35-001_filter

s1a-ew-grd-vv-20180203t130730-20180203t130830-020442-022f35-001_winddir

s1a-ew-grd-vh-20180203t130730-20180203t130830-020442-022f35-002_winddir