undef

s1a-ew-grd-vv-20210905t211331-20210905t211435-039552-04acb8-001_filter

s1a-ew-grd-vh-20210905t211331-20210905t211435-039552-04acb8-002_filter

s1a-ew-grd-vv-20210905t211331-20210905t211435-039552-04acb8-001_winddir

s1a-ew-grd-vh-20210905t211331-20210905t211435-039552-04acb8-002_winddir