is great, but it isn't always accurate. It's susceptible to interference, especially in urban settings, which is why Boeing is working on a new system to fill the holes that GPS has when it's really needed.
The objective of the( ) program is to develop technologies that can exploit various "signals of opportunity"â€”electronic waves emanating from satellites, cellphone towers and even television transmission towersâ€”to provide precise location and navigation information to ground troops when GPS signals are being electronically jammed or blocked by natural or man-made obstacles, such as foliage or buildings.
Sounds pretty cool, but don't get excited for the navigation to improve in your Escalade anytime soon â€” this is being developed first and foremost for the military, and it won't be ready for their use for years. Patience, my pets.