Hey i just got the game and love it! however I've been having issues locating the satellite dishes when wondering the surrounding forest and thought of a way to implement a G.P.S. system:
pros:
mobile map making it easy to find dishes + base when exploring
cons:
requires active satellite dishes (inactive dishes creates "dead zones")
only shows approximate location (a circle around the player moving around the player)
can't be used to pin/waypoint points of interest
requires batteries in order to work
expensive to buy
other:
if you want to add to the anomalies in the game you could also add one that effects the G.P.S. either harming, breaking, or jamming the player/G.P.S.
just my thoughts on an issue i seem to have other than that love the game and i hope you have fun making the game!