DARPA seeks new positioning, navigation, timing solutions
The Defense Advanced Research Projects Agency (DARPA), writing about GPS, said: "The military relies heavily on the Global Positioning System (GPS) for positioning, navigation, and timing (PNT), but GPS access is easily blocked by methods such as jamming. In addition, many environments in which our military operates (inside buildings, in urban canyons, under dense foliage, underwater, and underground) have limited or no GPS access." This raises the questions of what DARPA plans as a step up. Will DARPA introduce relevant new technologies? Let DARPA say it in its own words: "GPS has provided a tremendous strategic advantage to the U.S. military, but heavy reliance on GPS has also become a strategic vulnerability. The need to be able to operate effectively in areas where GPS is inaccessible, unreliable or potentially denied by adversaries has created a demand for alternative precision timing and navigation capabilities."