GPS BEIDOU (mm) , (text messaging) .
BEIDOU 16 - - . 2011, , 100.000 GPS . 2008 .
, .
GPS .
- China to upgrade homegrown GPS to improve accuracy, Staff Writers, Beijing (UPI) Dec 30, 2013
http://www.gpsdaily.com/reports/Chin...uracy_999.html
2. Beidou to cover world by 2020 with 30 satellites, Yang Jian, Beijing (XNA) Dec 29, 2013
http://www.gpsdaily.com/reports/Beid...lites_999.html
3. China to take free navigation system global by Zhao Huanxin for Xinhua News, Beijing (XNA) Dec 29, 2013
http://www.gpsdaily.com/reports/China_to_take_free_navigation_system_global_999.ht ml
4. defencenet.gr