顾及钟差短时相关性的导航卫星实时钟差估计  

Real-time clock bias estimation for navigation satellites considering clock bias short-time correlation

作　　者：王中元[1] 周圣淇 胡超[2] 王瑞光 姚雪燕 来闯 WANG Zhongyuan;ZHOU Shengqi;HU Chao;WANG Ruiguang;YAO Xueyan;LAI Chuang(School of Environment and Surveying and Mapping,China University of Mining and Technology,Xuzhou 221116,China;School of Spatial Information and Geomatics Engineering,Anhui University of Science and Technology,Huainan 232001,China;School of Transportation,Southeast University,Nanjing 211189,China)

机构地区：[1]中国矿业大学环境与测绘学院,徐州221116 [2]安徽理工大学空间信息与测绘工程学院,淮南232001 [3]东南大学交通学院,南京211189

出　　处：《中国惯性技术学报》2025年第1期27-35,共9页Journal of Chinese Inertial Technology

基　　金：国家自然科学基金(42404015);2024年江苏省研究生科研创新计划(KYCX24_2831);中国矿业大学2024年研究生创新计划项目(2024WLJCRCZL240)。

摘　　要：为提高导航卫星钟差估计精度,提出了一种顾及钟差短时相关性的实时钟差估计方法。通过结合钟差状态参数(钟速、频漂),建立实时钟差估计模型,并采用并行策略和高性能矩阵库对程序进行优化,以提高钟差估计的效率。将白噪声模型估计的钟差作为对比,分析钟差二次差的标准差精度,GPS精度提升5.80%,GLONASS精度提升25.77%,Galileo精度提升23.66%,BDS-3精度提升5.66%;在精密单点定位精度分析中,对于GPS+BDS-3组合,钟差状态模型估计的钟差产品相比白噪声估计的钟差产品,东、北、天方向的精度分别提高了11.46%、22.12%和3.52%;对于GPS+BDS-3+GLONASS+Galileo组合,东、北、天方向的精度分别提高了1.79%、2.75%和11.29%。In order to improve the estimation accuracy of the navigation satellite clock bias,a real-time clock bias estimation method that takes into account the short-time correlation of the clock bias is proposed.By combining the clock bias state parameters(clock speed and frequency drift),a real-time clock bias estimation model is established,and the program is optimized with a parallel strategy and a high-performance matrix library to improve the efficiency of clock bias estimation.Taking the clock bias estimated by the white noise model as a comparison and analyzing the standard deviation accuracy of the clock bias quadratic difference,the accuracy of GPS is improved by 5.80%,the accuracy of GLONASS is improved by 25.77%,the accuracy of Galileo is improved by 23.66%,and the accuracy of BDS-3 is improved by 5.66%.In the analysis of the accuracy of precision point positioning,for the combination of GPS+BDS-3,the accuracy of the clock bias product estimated by the clock bias state model is improved by 11.46%,22.12%and 3.52%in the east,north and sky directions,respectively,compared with the clock bias product estimated by white noise.For the GPS+BDS-3+GLONASS+Galileo combination,the accuracy in the east,north and sky directions is improved by 1.79%,2.75%and 11.29%.

关 键 词：实时钟差估计 钟差短时相关性 非差模型 高效估计 

分 类 号：P228.4[天文地球—大地测量学与测量工程]