.. GEOS-Chem GEOS-Chem ~~~~~~~~~ GEOS-Chem used the Binary Punch (bpch) file for many years, but now relies on NetCDF. PseudoNetCDF provides readers and convenience functions for both. * :class:`gcnc `: Newer GEOS-Chem NetCDF files * :class:`bpch `: Best Binary Punch reader (chooses bpch1 or bpch2) * :class:`bpch1 `: Binary Punch reader (load to mem) * :class:`bpch2 `: Binary Punch reader (memory mapped) * :class:`geos `: Raw GEOS met files. * :class:`flightlogs `: Legacy flight log output.