Hold off. There was a thread in the last day or two about a new bird that is adding two more military, AND another civilian channel. That is supposed to allow NEW units to bring the civilian accuracy level way down, even much better than WAAS units; perhaps to a meter or less; 1 or 2 centimeters for military in motion.
You might try a search to find it. Launch; rocket; satellite; GPS all immediately come to mind to start with.
THanks, I will search.