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