摘要
基于转发体制卫星导航定位是一种创新的卫星导航方法,有必要分析和验证其定位性能。本文基于虚拟原子钟伪距测量定位原理,提出了定位误差仿真的总体思路,并建立了电离层延迟、对流层延迟、伪距观测量和定位解算等数学模型,最后利用4颗在轨通信卫星对中国典型地区进行了定位误差仿真试验分析。仿真结果表明,部分地区可见星达不到4颗,系统定位误差约10m左右,但某些时段存在定位误差突然增大的现象。
As transponding-based satellite navigation and position is innovative, it is necessary to analyze and validate positioning performance. Based on pseudorange measurement principle with virtual atomic clock, the general idea of positioning error simulation is proposed and the mathematical models including ionospheric delay, tropospheric delay, pseudorange measurements and positioning solution are established. Finally, the positioning error simulation experiment of several typical regions in China with four communication satellites in-orbit is implemented. Results show that the numbers of visible satellites are less than 4 in some regions and positioning error is about 10m while it will increases suddenly within a day part.
出处
《电子设计工程》
2014年第1期6-10,共5页
Electronic Design Engineering
基金
国家自然科学基金(41204031)
关键词
转发体制卫星导航
虚拟原子钟
伪距测量
数学模型
定位误差仿真
transponding-based satellite navigation
virtual atomic clock
pseudorange measurement
mathematicalmodels
positioning error simulation
