undef

s1b-ew-grd-hh-20170609t132748-20170609t132852-005974-00a7bc-001_filter

s1b-ew-grd-hv-20170609t132748-20170609t132852-005974-00a7bc-002_filter

s1b-ew-grd-hh-20170609t132748-20170609t132852-005974-00a7bc-001_winddir

s1b-ew-grd-hv-20170609t132748-20170609t132852-005974-00a7bc-002_winddir