GNSS单站授时系统性偏差分析  

Analysis of Systematic Bias of Single Station Time Service

作　　者：于合理[1,2] 郝金明 田英国[1] 宋超 李伟杰[4] 

机构地区：[1]信息工程大学导航与空天目标工程学院,郑州市科学大道62号450001 [2]北斗导航应用技术河南省协同创新中心,郑州市科学大道62号450001 [3]西安卫星测控中心,西安市咸宁东路28号710043 [4]信息工程大学地理空间信息学院,郑州市科学大道62号450001

出　　处：《大地测量与地球动力学》2017年第1期30-34,共5页Journal of Geodesy and Geodynamics

基　　金：中国第二代卫星导航系统重大专项(GFZX0301040308);地理信息工程国家重点实验室开放基金(SKLGIE2015-M-1-6)~~

摘　　要：从单站授时基本观测方程出发,对引起系统性偏差的原因进行研究,结合具体实验分析卫星钟差和接收机硬件延迟对授时结果的影响。实验结果表明,卫星钟差引起的系统性偏差随时间变化,对所有测站影响相同;接收机硬件延迟会对授时结果造成系统性偏差影响,不同测站的系统性偏差不同,其大小取决于各自接收机硬件延迟的偏差,在进行授时及时间同步时应当加以改正;接收机硬件延迟不影响授时结果频率的稳定度,在进行频率传递时无需改正。Starting from the basic equations of single station timing, we analyze the factors that cause systematic bias of timing results. Combining the specific experiments, the influence of satellite clock error and receiver hardware delay is analyzed and some usdul conclusions are obtained. The systematic bias caused by satellite clock error for all stations changes with time. However, the systematic bias associated with results caused by the receiver code bias of various stations differs, depending entirely on the value of the different receiver code biases, so it should be corrected carefully in the timing and time synchronization. However, the receiver hardware delay does not affect the frequency stability of timing results, so there is no need to correct it in frequency transfer.

关 键 词：GNSS 授时 系统性偏差 卫星钟差 硬件延迟偏差 

分 类 号：P228[天文地球—大地测量学与测量工程]