Accuracy evaluation of multi-GNSS broadcast ionospheric model

doi:10.13474/j.cnki.11-2246.2022.0012

Abstract

Abstract: Ionospheric error is one of the main error sources for navigation and positioning, and broadcast ionospheric models provide a simple and effective method for single-frequency users to correct ionospheric delays. In this paper, the GIM product provided by CODE is used as the benchmark for evaluation, and the accuracy of four major broadcast ionospheric models is evaluated in various aspects, aiming to provide reference for subsequent model improvement and application. The results show that:the correction rate of each model is higher in the northern hemisphere than in the southern hemisphere, and the daytime correction rate is higher than that in the night. The NeQuick model has an average service performance in the middle and low latitudes, but is significantly higher than the BDSK8 and GPSK8 models in the high latitudes, and the correction rate is about 5% higher than that of the BDGIM model.The BDSK8/GPSK8/BDGIM model has the highest correction accuracy in the middle and low latitudes, and the correction in the high latitude band is The accuracy of BDSK8/GPSK8/BDGIM model is the highest in middle and low latitudes, and the correction rate of high latitude band is slightly worse. BDGIM model performs better than other models in general, and the global range correction rate can reach 76.91%.

Key words: ionosphere, broadcast ionosphere model, GIM, accuracy evaluation, VTEC

CLC Number:

P228

LIU Jialong, JIA Xiaolin, TAO Qingrui, FU Junsheng, ZHANG Fen. Accuracy evaluation of multi-GNSS broadcast ionospheric model[J]. Bulletin of Surveying and Mapping, 2022, 0(1): 66-71,78.

References

[1] 毛悦, 朱永兴, 宋小勇. 全球系统广播电离层模型精度分析[J]. 大地测量与地球动力学, 2020, 40(9):888-891.
[2] WANG Ningbo, YUAN Yunbin, LI Zishen, et al. An examination of the Galileo NeQuick model:comparison with GPS and JASON TEC[J]. GPS Solutions, 2017, 21(2):605-615.
[3] 胡广保. 几种电离层模型对单频单点定位的影响分析[J]. 测绘与空间地理信息, 2020, 43(3):153-156.
[4] ARAGON-ANGEL A, ZVRN M, ROVIRA-GARCIA A. Galileo ionospheric correction algorithm:an optimization study of NeQuick-G[J]. Radio Science, 2019, 54(11):1156-1169.
[5] BRACK A, MÄNNEL B, SCHUH H. GLONASS FDMA data for RTK positioning:a five-system analysis[J]. GPS Solutions, 2020, 25(1):1-13.
[6] YANG Yuanxi, GAO Weiguang, GUO Shuren, et al. Introduction to BeiDou-3 navigation satellite system[J]. Navigation, 2019, 66(1):7-18.
[7] 周仁宇,胡志刚,苏牡丹,等.北斗全球系统广播电离层模型性能初步评估[J].武汉大学学报(信息科学版),2019,44(10):1457-1464.
[8] 赵坤娟. 基于iGMAS的电离层监测和评估方法研究[D]. 西安:中国科学院大学(中国科学院国家授时中心), 2020.
[9] 李子申, 王宁波, 李敏, 等. 国际GNSS服务组织全球电离层TEC格网精度评估与分析[J]. 地球物理学报, 2017, 60(10):3718-3729.
[10] 丁毅涛, 郭美军. 北斗电离层模型精度分析[J]. 大地测量与地球动力学, 2021, 41(2):131-139.
[11] 姜意, 刘宸, 罗方妧, 等. 北斗系统电离层修正抗扰动能力分析[J]. 大地测量与地球动力学, 2020, 40(9):892-897.
[12] WANG Ningbo, LI Zishen, LI Min, et al. GPS, BDS and Galileo ionospheric correction models:an evaluation in range delay and position domain[J]. Journal of Atmospheric and Solar-Terrestrial Physics, 2018, 170:83-91.
[13] 王宁波. GNSS差分码偏差处理方法及全球广播电离层模型研究[J]. 测绘学报, 2017, 46(8):1069.
[14] 袁运斌, 李敏, 霍星亮, 等. 北斗三号全球导航卫星系统全球广播电离层延迟修正模型(BDGIM)应用性能评估[J]. 测绘学报, 2021, 50(4):436-447.
[15] 彭腾. 广播电离层模型性能评估及影响因素分析[D]. 西安:长安大学, 2018.
[16] 周金宁, 赵齐乐, 胡志刚, 等. 北斗不同电离层模型精度分析[J]. 测绘通报, 2020(8):71-75.
[17] 刘宸. GNSS导航电离层模型精化研究[D]. 郑州:信息工程大学, 2017.
[18] 陈秀德, 贾小林, 朱永兴, 等. 不同电离层格网产品的精度分析[J]. 大地测量与地球动力学, 2017, 37(8):849-855.
[19] 刘帅, 贾小林. GNSS电离层模型改正精度评估与分析[J]. 空间科学学报, 2016, 36(3):297-304.
[20] 程娜. GNSS广播电离层精度监测评估方法研究[D]. 西安:长安大学, 2015.