undef

s1b-iw-grd-vv-20210821t122505-20210821t122534-028344-0361ca-001_filter

s1b-iw-grd-vh-20210821t122505-20210821t122534-028344-0361ca-002_filter

s1b-iw-grd-vv-20210821t122505-20210821t122534-028344-0361ca-001_winddir

s1b-iw-grd-vh-20210821t122505-20210821t122534-028344-0361ca-002_winddir