The Daily Mail reports on a chip developed for the military that could be used as a backup for GPS. From the story:
GPS has become a part of everyday life for most of us, with phones, cars, boats and planes relying on the network of satellites to pinpoint their location.
However, the US military has revealed a tiny chip, small enough to fit on a penny, that could do away with the need for an expensive network of orbiting base stations.
The tiny chip contains three gyroscopes, three accelerometers and a master clock, and when combined with computer software, can work out exactly where it is going.
This is useful for creating small drones and robots, ordnance that adjusts its own trajectory, and of course as a backup when more powerful positioning systems go down.
The device is so small it could even be placed in bullets and small missiles.A cheaper response to anti-satellite weapons than I would have anticipated.