Quick, what’s the best alternative when GNSS signals are not available? This is not a simple question, but we’re asking for a simple answer. Among the multiple avenues pursued at the U.S. Defense Advanced Research Projects Agency (DARPA), as described in February’s PNT Roundup, which has the most promise?
- Inertial sensors
- Chip-scale atomic clocks
- Cell signals
- Low-Earth orbit communications satellites
- Video cameras
- Ground-based beacons
- Other (please specify)
Go to gpsworld.com/17febpoll to give us your opinion by February 22 and we’ll enter you in a drawing to receive a $50 gift card.