undef

s1a-s6-grd-vv-20201028t115928-20201028t115953-034996-04150c-001_filter

s1a-s6-grd-vh-20201028t115928-20201028t115953-034996-04150c-002_filter

s1a-s6-grd-vh-20201028t115928-20201028t115953-034996-04150c-002_winddir

s1a-s6-grd-vv-20201028t115928-20201028t115953-034996-04150c-001_winddir