undef
s1b-iw-grd-vh-20180111t095208-20180111t095238-009122-010520-002_filter
s1b-iw-grd-vv-20180111t095208-20180111t095238-009122-010520-001_filter
s1b-iw-grd-vv-20180111t095208-20180111t095238-009122-010520-001_winddir
s1b-iw-grd-vh-20180111t095208-20180111t095238-009122-010520-002_winddir