undef

s1a-iw-grd-vv-20190912t020647-20190912t020712-028982-03497f-001_filter

s1a-iw-grd-vh-20190912t020647-20190912t020712-028982-03497f-002_filter

s1a-iw-grd-vh-20190912t020647-20190912t020712-028982-03497f-002_winddir

s1a-iw-grd-vv-20190912t020647-20190912t020712-028982-03497f-001_winddir