China will develop 12 Beidou or North Dipper satellites, some destined for geostationary orbit. It plans a navigation and positioning system of more than 30 satellites, Sun said.
孙来燕说，中国还将完成12颗北斗导航卫星的系统，其中一些将会绕着赤道运行。计划中的导航以及定位系统的卫星将超过30颗。
This thesis analyzes the principle and architecture of three-star navigation system based on "Beidou" system and investigates the problems related with positioning precision.
本论文分析了基于北斗导航定位系统的三星定位系统总体结构和工作原理，对卫星导航中与定位精度有关的部分进行了研究。
"Beidou" double satellite positioning system, adopting two geosynchronous satellites to position, has the characteristic of high precision in positioning and active positioning mechanism.
北斗双星定位系统(简称双星定位)利用两颗地球同步卫星进行定位，具有定位精度高、采用有源定位体制的特点。
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