undef

s1b-ew-grd-vv-20190801t155123-20190801t155227-017394-020b5d-001_filter

s1b-ew-grd-vh-20190801t155123-20190801t155227-017394-020b5d-002_filter

s1b-ew-grd-vv-20190801t155123-20190801t155227-017394-020b5d-001_winddir

s1b-ew-grd-vh-20190801t155123-20190801t155227-017394-020b5d-002_winddir