From DARPA, A Navigational Device That Fits On A Penny And Works When GPS Doesn't

DARPA's new on-the-go navigation chip can measure orientation, acceleration, and time. GPS is great, but it isn't always reliable. The signal can be interrupted by, say, a tunnel, or something else smothering the relay between here and space. So DARPA wants to navigate GPS blackout areas with a chip that does everything you need when GPS stops working, and to make that tech smaller than a penny. The chip is called a timing and inertial measurement unit (TIMU), and it's actually a pretty simple l...