undef

s1a-iw-grd-vv-20190830t224548-20190830t224613-028805-03435d-001_filter

s1a-iw-grd-vh-20190830t224548-20190830t224613-028805-03435d-002_filter

s1a-iw-grd-vv-20190830t224548-20190830t224613-028805-03435d-001_winddir

s1a-iw-grd-vh-20190830t224548-20190830t224613-028805-03435d-002_winddir