The Geostationary grid mapping was added in CF conventions 1.7.

This has been raised by a number of our users in the satellite community. Increasingly satellite products on this type of projection are becoming available in the satellite meteorology community so it would be very helpful to support the Geostationary grid_mapping correctly.

For more background on the discussions adding the projection to CF 1.7, you can view the original discussion of its inclusion here.

(Let me know if you need help getting hold of example netCDF files on a geostationary projection!)