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Study on Satellite Clock Bias Prediction Based on Entropy Weight Method |
MEI Chang-song,LI Tian-zhi,LI Ming,CHENG Hao,YIN Yong-zhen,KONG Xiang-wen |
Yangtze Ecology and Environment Co., Ltd., Wuhan, Hubei 430000, China |
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Abstract On-board atomic clock is one of the core equipment of navigation satellite system. Its performance and clock bias prediction accuracy directly determine the accuracy of navigation and positioning timing services. Aiming at the problem that it is difficult to determine the weight of the neutron model of the satellite clock bias combined forecast model, the entropy weight method is introduced into the Beidou satellite clock bias combined forecast. Perform phase-frequency combined detection of outliers such as gross errors and clock jumps in satellite clock bias data, and use sliding Lagrangian interpolation to repair them to obtain a “clean” clock bias sequence. Based on the grey model and the quadratic polynomial model, a combination model of clock bias based on information entropy, a new evaluation index, is constructed, and a combined forecast model of Beidou satellite clock bias entropy weight is established. Using the Beidou precision clock bias data product released by the IGS Data Center of Wuhan University, the short term forecast and medium-long term forecast experiments are carried out for multiple consecutive days. The multi-day average test results verify that the entropy weight combination model has certain advantages over the traditional combination model in terms of the accuracy and stability of the Beidou satellite clock bias prediction.
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Received: 25 August 2021
Published: 19 September 2022
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[1]崔先强, 焦文海. 灰色系统模型在卫星钟差预报中的应用 [J]. 武汉大学学报·信息科学版, 2005, 30(5): 447-450.
Cui X Q, Jiao W H. Grey System Model for the Satellite Clock Error Predicting [J]. Geomatics and Information Science of Wuhan University, 2005, 30(5): 447-450.
[2]郑作亚, 党亚民, 卢秀山, 等. 附有周期项的预报模型及其在GPS卫星钟差预报中的应用研究 [J]. 天文学报, 2010, 51(1): 95-102.
Zheng Z Y, Dang Y M, Lu X S, et al. Prediction Model with Periodic Item and Its Application to the Prediction of GPS Satellite Clock Bias [J]. Acta Astronomica Sincia, 2010, 51(1): 95-102.
[3]Allan D W. Time and Frequency (Time-Domain) Characterization, Estimation, and Prediction of Precision Clocks and Oscillators [J]. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 1987, 34(6): 647-654.
[4]朱江淼, 王星, 高源, 等. 综合多家实验室的原子时标发布系统设计 [J]. 计量学报, 2020, 41(2): 238-242.
Zhu J M, Wang X, Gao Y, et al. Design of Atomic Time Scale Publication System for Multiple Laboratories [J]. Acta Metrologica Sinica, 2020, 41(2): 238-242.
[5]朱江淼, 孙盼盼, 高源, 等. 原子钟频差数据去噪算法的研究 [J]. 计量学报, 2017, 38(4): 499-503.
Zhu J M, Sun P P, Gao Y, et al. The Denoise of the Atomic Clock Frequency Differences [J]. Acta Metrologica Sinica, 2017, 38(4): 499-503.
[6]雷雨, 蔡宏兵, 赵丹宁. 基于相空间重构与高斯过程的卫星钟差预报 [J]. 计量学报, 2016, 37(3): 318-322.
Lei Y, Cai H B, Zhao D N. A Novel Method for Satellite Clock Bias Prediction Based on Phase Space Reconstruction and Gaussian Processes [J]. Acta Metrologica Sinica, 2016, 37(3): 318-322.
[7]朱江淼, 陈烨, 高源, 等. 原子钟钟差预测不确定度的建模与分析 [J]. 计量学报, 2019, 40(4): 714-720.
Zhu J M, Chen Y, Gao Y, et al. Modeling and Analysis of Prediction Uncertainty of Clock Difference in Atomic Clock [J]. Acta Metrologica Sinica, 2019, 40(4): 714-720.
[8]宁津生, 姚宜斌, 张小红. 全球导航卫星系统发展综述 [J]. 导航定位学报, 2013, 1(1): 3-8.
Ning J S, Yao Y B, Zhang X H. Review of the Development of Global Satellite Navigation System [J]. Journal of Navigation and Positioning, 2013, 1(1): 3-8.
[9]蔚保国, 鲍亚川, 魏海涛. 面向时间同步业务的空间信息网络拓扑聚合图模 [J]. 电子与信息学报, 2017, 39(12): 2929-2936.
Yu B G, Bao Y C, Wei H T. Time Synchronization Service Oriented Topology Aggregation Model of Space Information Network [J]. Journal of Electronics & Information Technology, 2017, 39(12): 2929-2936.
[10]Ge M R, Chen J P, Dousa J, et al. A computationally efficient approach for estimating high-rate satellite clock corrections in realtime [J]. GPS Solution, 2012, 16(1): 9-17.
[11]郑作亚, 陈永奇, 卢秀山. 灰色模型修正及其在实时GPS卫星钟差预报中的应用研究 [J]. 天文学报, 2008, 49(3): 306-320.
Zheng Z Y, Chen Y Q, Lu X S. An Improved Grey Model for the Prediction of Real-Time GPS Satellite Clock Bias [J]. Acta Astronomica Sincia, 2008, 49(3): 306-320.
[12]Huang G W, Zhang Q, Xu G C. Real-Time Clock Offset Prediction with an Improved Model [J]. GPS Solution, 2014, 18(1): 95-104.
[13]马卓希, 杨力, 贾小林. BDS星载原子钟周期项特性及预报研究 [J]. 大地测量与地球动力学, 2017, 37(3): 292-296.
Ma Z X, Yang L, Jia X L. Research on Prediction and Characterization of Periodic Variations in BDS Satellite Clocks [J]. Journal of Geodesy and Geodynamics, 2017, 37(3): 292-296.
[14]Senior K L, Ray J R, Beard R L. Characterization of periodic variations in the GPS satellite clocks [J]. GPS Solution, 2008, 12(3): 211-225.
[15]王继刚, 胡永辉, 何在民, 等. 基于修正线性组合模型的原子钟钟差预报 [J]. 天文学报, 2011, 52(1): 54-61.
Wang J G, Hu Y H, He Z M, et al. Modified Linear Combination Model for Atomic Clock Prediction [J]. Acta Astronomica Sincia, 2011, 52(1): 54-61.
[16]李晓宇, 杨洋, 胡晓粉, 等. 基于改进灰色ARMA模型的卫星钟差短期预报研究 [J]. 大地测量与地球动力学, 2013, 33(1): 59-63.
Li X Y, Yang Y, Hu X F, et al. Research on Short-term Perdiction of Satellite Clock Errors Based on Improved Grey ARMA Model [J]. Journal of Geodesy and Geodynamics, 2013, 33(1): 59-63.
[17]Lei Y, Hu Z, Zhao D. A Novel Method for Navigation Satellite Clock Bias Prediction Considering Stochastic Variation Behavior [J]. Lecture Notes in Electrical Engineering, 2014(S4): 369-379.
[18]布金伟, 左小清, 常军, 等. BDS/GPS星载原子钟的短期钟差预报模型研究 [J]. 天文学报, 2018, 59(1): 72-86.
Bu J W, Zuo X Q, Chang J, et al. Study on the Prediction Model of Short-term Clock Difference for the Atomic Clock Onboard BDS/GPS Satellite [J]. Astronomica Sincia, 2018, 59(1): 72-86.
[19]王冬霞, 郭睿, 谢金石, 等. 北斗新一代导航卫星的组合钟差预报模型及精度评估 [J]. 测绘学报, 2018, 47(S0): 61-70.
Wang D X, Guo R, Xie J S, et al. Combined Clock Error Forecast Model and Accuracy Evaluation of Beidou Next-Generation Navigation Satellites [J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(S0): 61-70. |
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