undef

s1a-ew-grd-vv-20200921t221537-20200921t221637-034463-040280-001_filter

s1a-ew-grd-vh-20200921t221537-20200921t221637-034463-040280-002_filter

s1a-ew-grd-vv-20200921t221537-20200921t221637-034463-040280-001_winddir

s1a-ew-grd-vh-20200921t221537-20200921t221637-034463-040280-002_winddir