undef
s1b-iw-grd-vv-20171012t095903-20171012t095930-007795-00dc48-001_filter
s1b-iw-grd-vh-20171012t095903-20171012t095930-007795-00dc48-002_filter
s1b-iw-grd-vh-20171012t095903-20171012t095930-007795-00dc48-002_winddir
s1b-iw-grd-vv-20171012t095903-20171012t095930-007795-00dc48-001_winddir