undef

s1b-iw-grd-vv-20190905t093650-20190905t093715-017901-021b00-001_filter

s1b-iw-grd-vh-20190905t093650-20190905t093715-017901-021b00-002_filter

s1b-iw-grd-vh-20190905t093650-20190905t093715-017901-021b00-002_winddir

s1b-iw-grd-vv-20190905t093650-20190905t093715-017901-021b00-001_winddir