一种新的高动态条件下实时高精度伪距计算方法

沙海; 陈华明; 吕志成; 李峥嵘; 欧钢

doi:10.13203/j.whugis20140094

一种新的高动态条件下实时高精度伪距计算方法

1.
国防科技大学电子科学与工程学院, 湖南长沙, 410073;
2.
北京卫星导航中心, 北京, 100094

基金项目: 国家自然科学基金(61403413)。

详细信息

作者简介:
沙海,博士生,主要从事卫星导航仿真测试方法研究。sandhai@163.com

通讯作者:
欧钢,博士,教授。ougang@nudt.edu.cn

中图分类号: P228
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出版历程
- 收稿日期: 2014-12-24
- 发布日期: 2016-04-04

A New Method of Real-time High Precision Pseudorange Calculation in High Dynamic Circumstance

1.
College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;
2.
Beijing Satellite Navigating Center, Beijing 100094, China

Funds: The National Natural Science Foundation of China, No.61403413.

摘要

摘要: 针对高动态全球导航卫星系统(Global Navigation Satellite System,GNSS)仿真系统中伪距计算精度与实时性的矛盾,提出了一种基于三阶Hermite插值的实时高精度伪距计算方法。首先通过插值算法获得卫星轨道并调整误差项计算顺序来优化伪距计算方法,然后在已知两个节点处的伪距及其导数后,采用三阶Hermite插值算法计算伪距变化模型参数,其中伪距导数通过二阶Lagrange插值多项式的求导公式求得。高动态仿真结果表明,在时间间隔取1 s时,最大伪距误差为0.638 mm,标准差为0.172 mm。
- 卫星导航系统 /
- GNSS仿真系统 /
- 伪距计算 /
- 高动态
Abstract: In highly dynamic GNSS simulation systems, since there is a contradiction between precision and calculated volume, a method of real-time high precision pseudorange calculation based on the third-order Hermite interpolation is proposed. In this method, a satellite orbit is computed by an interpolation algorithm and the sequences of the error computation is changed to optimize the pseudorange calculations. Then, by knowing the pseudoranges and derivatives for two nodes, the parameters of the pseudorange change model was computed by a third-order Hermite interpolation algorithm. The pseudorange derivative was obtained by the second order derivative Lagrange interpolation formula. The highly dynamic simulation results show that when the time interval is 1 s, the maximum pseudo-range error is 0.638 mm, and the standard deviation is 0.172 mm.
- satellite navigation system /
- GNSS simulation system /
- pseudo-range calculation /
- highly dynamic

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参考文献(13)

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