摘要
卫星导航系统评估星载钟稳定度通常需要大型地面监测网的观测数据和复杂的钟差确定算法,不能基于单站观测数据实现。论文在分析利用单站观测数据评估星载钟短稳方法的基础上,提出了一种相对容易实现的联合卫星双向载波测距值与GNSS单向载波观测值的星载钟短稳评估方法。该方法通过卫星双向载波测距确定星地几何距离,基于消除星地几何距离的GNSS接收机载波相位观测值估算卫星相对钟差,进而实现其短稳评估。利用北斗系统观测数据进行了有效性验证,并与复杂钟差确定算法以及利用平滑广播星历的方法(SBE法)进行了对比,本文方法与复杂钟差确定算法计算的结果相符,在1000s平滑间隔内与SBE法结果一致,相对误差小于10%,1000s以上好于SBE法。
Usual estimation method of satellite on-board clock short-term stability demands continuous observation of large ground monitoring network and complex algorithm,which is not suitable for single station observation.Based on an analysis of the short-term frequency stability estimation method of satellite on-board clock using observation from one single station,a simpler method combining satellite two-way carrier ranging with GNSS one-way carrier phase observation is proposed.This method is based on GNSS carrier phase observation eliminating geometric distance between satellite and receiver,which is determined by satellite two-way carrier ranging.Performance of this method is evaluated by using BDS data.The estimation result agrees well with result of complex algorithm,and is very close to the smoothed broadcast ephemeris method（SBE method） for average time of 1-1000 seconds with relative error less than 10%,but better than SBE method for average time above 1000 seconds.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2013年第3期158-163,共6页
Journal of National University of Defense Technology
基金
中国第二代卫星导航系统重大专项(GFZX0301020211)
关键词
北斗卫星导航系统
星载原子钟
短期稳定度
卫星无线电测距
载波相位
BeiDou Navigation Satellite System（BDS）
on-board clock
short-term stability
satellite radio ranging
carrier phase
