L1-L5 GPS augmentation signals being tested in AUstralia.
INMARSAT launched with a bent pipe transponder payload. Two year test and evaluation period. Accuracy down to less than 1m....
Dick, time to start beating up the polies to ensure this becomes FREELY available. It isn't just aviation but autonomous car technology and a huge host of other technologies...
How many space based 3D approaches could you get designed for the price of one ILS installation?