undef
s1b-ew-grd-vh-20190428t122525-20190428t122602-016006-01e172-002_filter
s1b-ew-grd-vv-20190428t122525-20190428t122602-016006-01e172-001_filter
s1b-ew-grd-vv-20190428t122525-20190428t122602-016006-01e172-001_winddir
s1b-ew-grd-vh-20190428t122525-20190428t122602-016006-01e172-002_winddir