undef
s1a-ew-grd-hv-20151005t115755-20151005t115855-008017-00b391-002_filter
s1a-ew-grd-hh-20151005t115755-20151005t115855-008017-00b391-001_filter
s1a-ew-grd-hh-20151005t115755-20151005t115855-008017-00b391-001_winddir
s1a-ew-grd-hv-20151005t115755-20151005t115855-008017-00b391-002_winddir