China
Backgrounder: 4 major global navigation systems
WATCH VIDEO
Source: CCTV.com | 04-15-2009 13:41
Special Report: Tech MaxClick for more news in News Hour>>
The Global Navigation Satellite System, or GNSS, is the standard term for satellite navigation systems. These allow small electronic receivers to pinpoint their location to just a few meters. Receivers on the ground in fixed positions can also be used to calculate precise times as a reference for scientific experiments.
There are currently four major Global Navigation Satellite Systems in the world, including China's Compass system. |
There are currently four major Global Navigation Satellite Systems in the world, including China's Compass system.