摘要
对北斗卫星导航系统(BDS)的测速原理进行说明,同时分析测速中各误差改正项对单点测速的影响,并给出相应的改正公式。最后分别利用静态数据模拟动态测速实验和低动态测速实验结果,对BDS的测速精度进行评价。实验表明,采用多普勒测速原理,利用静态数据模拟动态测速的精度可以达到cm/s,而采用载波相位导出的多普勒观测值模拟动态测速的精度为mm/s;在低动态测试实验中,原始多普勒测速的结果与组合导航设备测速的互差符合情况在cm/s水平,而导出多普勒测速结果与组合导航设备测速的互差符合情况在dm/s水平,导出多普勒测速结果受运动载体的运动影响明显。
The principle of velocity measurement using each error correctionon on single point velocity measurement Beidou System （BDS） was introduced, the effects of was analyzed and corresponding correction formulas were proposed. At last,the accuracy of BDS was evaluated according to the results of the experiments in which the results from dynamic velocity measurement and low dynamic velocity measurement were simulated using static data. The experiments show that the accuracy can reach cm/s in the simulation using Doppler Velocity Measurement Prin- ciple,and the accuracy can reach mm/s in the simulation using Doppler observation results derived by carrier phase. In low dynamic testing experiment, the mutual deviations between original Doppler velocity measurement re- suits and integrated navigation equipment velocity measurement accord with cm/s level. While the mutual deviations between derived Doppler velocity measurement results and integrated navigation equipment velocity measurement accord with dm/s level. It can be concluded that the results from integrated navigation equipment are obviously af- fected by the motion of carriers.
出处
《大地测量与地球动力学》
CSCD
北大核心
2014年第6期114-118,共5页
Journal of Geodesy and Geodynamics
基金
国家863计划项目(2013AA122501)
关键词
BDS单点测速
多普勒观测值
导出多普勒
精度
BDS absolute velocity determination
Doppler measurements
derived Doppler measurements
accuracy
