一种实时GNSS时间传递算法

发布时间：2018-01-06 11:22

本文关键词：一种实时GNSS时间传递算法　出处：《天文学报》2016年03期 　论文类型：期刊论文

【摘要】：针对载波相位时间传递算法的局限性,提出了一种实时GNSS(Global Navigation Satellite System)时间传递算法,通过共视(Common View,CV)卫星建立站间非差观测方程的联系,联合解算卫星钟差和站间时间传递结果.该算法不需要卫星精密钟差产品,仅用卫星精密轨道信息直接计算得到站间时间传递结果,不受卫星钟差内插精度、采样率的限制.该算法与通过站间单差将卫星钟差参数进行消除的传统共视算法不同,是将卫星钟差参数进行实时解算得到的.实验结果表明:该算法时间传递精度与传统的GNSS载波相位(Carrier Phase,CP)算法相当,比较适用于实时时间传递.
[Abstract]:Aiming at the limitation of carrier phase time transfer algorithm. A real-time GNSS(Global Navigation Satellite system time transfer algorithm is proposed. The non-differential observation equations between stations are established by means of common view common view (CVV) satellite, and the satellite clock difference and interstation time transfer results are solved jointly. This algorithm does not need satellite precise clock difference product. Only the precise orbit information of satellite is used to calculate the time transfer between stations directly, and the interpolation accuracy is not affected by satellite clock difference. This algorithm is different from the traditional common view algorithm which eliminates the satellite clock error parameters by single difference between stations. The experimental results show that the time transfer accuracy of the proposed algorithm is comparable to that of the traditional GNSS carrier phase carrier phase algorithm. It is suitable for real time transmission.
【作者单位】：信息工程大学导航与空天目标工程学院;北斗导航应用技术河南省协同创新中心;
【基金】：中国第二代卫星导航系统重大专项课题(GFZX0301040308-03、GFZX0301040101ZX04、GFZX0301040107) 地理信息工程国家重点实验室开放研究基金项目(SKLGIE2015-M-1-6)资助
【分类号】：P228.4
【正文快照】： 1引言自1980年Allan和Weiss首次提出了利用GPS(Global Positioning System)共视技术进行时间传递的方法以来,GNSS技术迅速成为时间传递的主要手段之一.利用GNSS进行时间传递主要有GNSS共视、GNSS全视(All in View,AV)和GNSS载波相位法.GNSSCV法和AV法均采用伪距码观测值作为观

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