Polar stereographic coordinates

[bschroeter]

At the moment, there is a check in this code that looks to see if longitudes fall within the ERA5 domain. However, when running a polar simulation there doesn't need to be a check on this.

The following error is raised:

IndexError: ERROR: Target area is outside the ERA5 archive domain
    Longitudes: Target (0.38:360.00), ERA5 (0.0:359.75)

I've made a hack version of the era5grib scripts that just comments out the longitude check, but it would be good to have this as an option to your utility - so that I can take advantage of the bug fixes as they roll out.

Perhaps this could be implemented as a command-line argument --polar, or just detected from the namelist.wps?

[ScottWales]

Thanks @bschroeter, I've added a --polar option to handle this case. It should be installed in unstable conda later today

[bschroeter]

@ScottWales , you are a champion. Thanks mate. I have a few other suggestions which I will raise in other issues to keep things clean.