Oh. Well, that's less than ideal. The main store page doesn't indicate at all that this is intended as a supplement to High Frontier - I had been under the impression that it was its own game that /could/ use the High Frontier map.
It is entirely standalone. You don’t even need the High Frontier map.
But if you haven’t played the High Frontier board game, you may want to invest in the equivalent of the Dungeon Masters Guide.
