undef

s1b-iw-grd-vv-20190829t102156-20190829t102221-017799-0217f3-001_filter

s1b-iw-grd-vh-20190829t102156-20190829t102221-017799-0217f3-002_filter

s1b-iw-grd-vh-20190829t102156-20190829t102221-017799-0217f3-002_winddir

s1b-iw-grd-vv-20190829t102156-20190829t102221-017799-0217f3-001_winddir