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应用科学学报 ›› 2009, Vol. 27 ›› Issue (2): 216-220.

• 控制与系统 • 上一篇    

星座双频测距测速自主定位与守时

曹辉 熊智 郁丰   

  1. 南京航空航天大学导航研究中心，南京210016
  • 收稿日期:2008-07-07 修回日期:2008-10-13 出版日期:2009-04-01 发布日期:2009-04-01
  • 作者简介:熊智，博士，副教授，研究方向：惯性技术、景象匹配辅助导航、微小卫星姿态测量及组合导航系统，E-mail：xznuaa@nuaa.edu.cn

Autonomous Constellation Positioning and Timing by Dual-frequency Inter-satellite Measurement

  1. Navigation Research Center, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2008-07-07 Revised:2008-10-13 Online:2009-04-01 Published:2009-04-01

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1708

被引次数

1

摘要：

传统星座自主导航主要以星间相对测距为主. 该技术定位精度有限，同时缺乏有效的手段克服星座的整体旋转. 该文在测距模型的基础上，将测速信息、传播延时和时钟误差纳入模型中，分析了电离层对测距的影响，推导了星间测距位置与时间的解耦模型. 提出利用GPS辅助测量来固定星座的位置基准和时间基准. 通过Matlab仿真实验表明：测速信息的引入能够进一步提高卫星的位置估计精度，同时GPS辅助测量可有效克服星座的整体旋转.

关键词: 星座, 自主导航, 双频, 解耦

Abstract:

Traditional autonomous constellation mainly concerns about inter-satellite position measurement. It lacks effective means to overcome the overall constellation rotation. This paper uses a module of inter-satellite measurement with additional parameters including velocity, delay error and clock error, and describes the dispelling ionosphere scattering technique and the method of achieving time and position decoupling. By using GPS, accuracy of LEO satellites in constellation is improved considerably, which offers the entire constellation a fixed time basis simultaneously. Simulation results show that the module with additional parameters has higher accuracy than the traditional module measurement of the entire constellation. Meanwhile, GPS can suppress positioning and clock errors caused by the location error of satellite.

Key words: constellation, autonomous navigation, double frequency, decoupling

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