Well, in `meshgrid`, the first parameter is the **innermost** index, while the 2nd, 3rd and so on are increasingly further outward indices. Unfortunately, this is kinda in contradiction with the [Google Doc](https://docs.google.com/document/d/1qPVrtECZUDHVVJz_CncCemqmeHk5nOgPlceIU7-jNGc/edit) which says:

>  * map is a 2d array of counts with coszen along the first axis (major index) and energy along the second axis (minor index)