The file exact_solutions.tgz contains the exact solutions to the Balsara 1 to 5 tests and of the generic Alfven test.

The file KO_exact_solutions.tgz contains the exact solutions to the Komissarov Shock Tube tests 1 and 2 and of the Komissarov collision test.

More details can be found in the original paper: https://ui.adsabs.harvard.edu/abs/2006JFM...562..223G/abstract