undef

s1b-iw-grd-vh-20190905t214246-20190905t214311-017908-021b40-002_filter

s1b-iw-grd-vv-20190905t214246-20190905t214311-017908-021b40-001_filter

s1b-iw-grd-vv-20190905t214246-20190905t214311-017908-021b40-001_winddir

s1b-iw-grd-vh-20190905t214246-20190905t214311-017908-021b40-002_winddir