基于残差统计特性的中国区域格网电离层GIVE算法优化

doi:10.11947/j.AGCS.2021.20200108

测绘学报 ›› 2021, Vol. 50 ›› Issue (3): 304-314.doi: 10.11947/j.AGCS.2021.20200108

基于残差统计特性的中国区域格网电离层GIVE算法优化

马岳鑫¹, 唐成盼¹, 胡小工¹, 常志巧², 蒲俊宇², 邢楠³, 曹月玲¹, 王宁波⁴

1. 中国科学院上海天文台, 上海 200235;
2. 32021部队, 北京 100000;
3. 北京师范大学, 北京 100036;
4. 中国科学院空天信息创新研究院, 北京 100036

收稿日期:2020-03-25 修回日期:2020-12-10 发布日期:2021-03-31
作者简介:马岳鑫(1992-),男,博士生,研究方向为高精度GNSS数据处理。E-mail:1793969117@qq.com
基金资助:
国家自然科学基金（41804030；41874039；41574029；41674041）

Optimization of GIVE algorithm for grid-based single shell ionospheric model over Chinese region based on residual statistics

MA Yuexin¹, TANG Chengpan¹, HU Xiaogong¹, CHANG Zhiqiao², PU Junyu², XING Nan³, CAO Yueling¹, WANG Ningbo⁴

1. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200235, China;
2. Troops 32021, Beijing 100000, China;
3. Beijing Normal University, Beijing 100036, China;
4. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100036, China

Received:2020-03-25 Revised:2020-12-10 Published:2021-03-31
Supported by:
The National Natural Science Foundation of China (Nos. 41804030;41874039;41574029;41674041)

摘要/Abstract

摘要： 北斗星基增强（BDSBAS）系统播发格网电离层改正数和格网电离层完好性参数GIVE，用以提升GNSS系统的服务精度并实现区域电离层活动完好性监视，以满足精密进近（GLS PA）需求。本文在实现BDSBAS格网电离层粗差剔除与改正数计算的基础上，提出了一种电离层完好性参数GIVE的优化方法，进而评估了BDSBAS格网电离层的应用精度。BDSBAS格网电离层格网点延迟估计采用平面拟合算法计算，异常数据剔除采用稳健的中值容错算法，GIVE的估计考虑了电离层残差分布的偏度与峰度统计特性，能够实现对电离层异常活动的及时响应。2020年1月实测数据分析结果表明，BDSBAS格网电离层修正精度（RMSE）为2~3 TECU，改正百分比达到75%~79%，GIVE包络率优于99.9%。修正格网电离层后可提升GPS定位精度20%~40%。

关键词: BDS BAS, 电离层, 完好性监视, GIVE, 偏度系数, 峰度系数

Abstract: To improve the service accuracy of the GNSS system and monitor the integrity of regional ionospheric activities, The BDSBAS system broadcasts the grid ionospheric correction parameters and GIVE to meet the precision approach needs. We use a planar fit algorithm to create an ionosphere map of the BDSBAS, in order to get a more accurate confidence bounds, we put forward a factor which is related to the Skewness and kurtosis of the residual distribution to control the decorrelation parameters to calculate the integrity parameter GIVE. The statistical results show that the ionospheric correction RMS of the BDSBAS grid-based single shell model is about 2~3 TECU, the correction percentage reaches 75%~79%; the GIVE envelope rate is better than 99.9%. Compared with the GPS basic navigation system, only adding the BDSBAS grid ionospheric correction can improve positioning accuracy by 20%~40%.

Key words: BDS BAS, ionosphere, integrity monitoring, GIVE, coefficient of skewness, kurtosis

中图分类号:

P2-019

马岳鑫, 唐成盼, 胡小工, 常志巧, 蒲俊宇, 邢楠, 曹月玲, 王宁波. 基于残差统计特性的中国区域格网电离层GIVE算法优化[J]. 测绘学报, 2021, 50(3): 304-314.

MA Yuexin, TANG Chengpan, HU Xiaogong, CHANG Zhiqiao, PU Junyu, XING Nan, CAO Yueling, WANG Ningbo. Optimization of GIVE algorithm for grid-based single shell ionospheric model over Chinese region based on residual statistics[J]. Acta Geodaetica et Cartographica Sinica, 2021, 50(3): 304-314.

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基于残差统计特性的中国区域格网电离层GIVE算法优化

Optimization of GIVE algorithm for grid-based single shell ionospheric model over Chinese region based on residual statistics

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