Article(id=1322506304959131734, tenantId=1146029695717560320, journalId=1281212831689347082, issueId=1322506263716541212, articleNumber=null, orderNo=null, doi=10.14075/j.jgg.2024.10.476, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1729353600000, receivedDateStr=2024-10-20, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793239674081, onlineDateStr=2026-10-29, pubDate=1757865600000, pubDateStr=2025-09-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793239674081, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793239674081, creator=13701087609, updateTime=1793239674081, updator=13701087609, issue=Issue{id=1322506263716541212, tenantId=1146029695717560320, journalId=1281212831689347082, year='2025', volume='45', issue='9', pageStart='881', pageEnd='990', issueExtLink='null', onlineDate='null', pubDate='1757865600000', pubDateStr='2025-09-15', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793239664248, creator='13701087609', updateTime=1793239664248, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=915, endPage=921, ext={EN=ArticleExt(id=1322506305353396311, articleId=1322506304959131734, tenantId=1146029695717560320, journalId=1281212831689347082, language=EN, title=Prediction of Differential Code Bias Based on LR-KF-LSTM Model, columnId=null, journalTitle=Journal of Geodesy and Geodynamics, columnName=null, runingTitle=null, highlight=null, articleAbstract=
The presence of differential code bias(DCB) can affect the accuracy of total electron content(TEC) calculations and pseudorange observations, thereby impacting navigation, positioning, timing, and meteorological research results.In order to accurately estimate DCB, this paper analyzes the temporal variations of GPS inter-frequency DCB data provided by the Chinese Academy of Sciences(CAS) from 2021 to 2022 and proposes an LR-KF-LSTM combined model for precise prediction and analysis of DCB. Experimental results indicate that the average absolute percentage error of this method is less than 1.9%, the average absolute error is less than 0.03 ns, and the root mean square error is less than 0.04 ns.Compared with the LSTM model, BP neural network model, and the DCB values from the CAS product, the combined model shows better prediction performance under different solar activity and geomagnetic conditions. This combined network model can effectively predict satellite DCB and also provides a reference for addressing the issue of single-day or multi-day missing data in the DCB data CAS products.
, authors=Siming LIAO
1, Junna SHANG
1, Mingkun SU
1, authorsList=Siming LIAO, Junna SHANG, Mingkun SU, authorCompany=null, correspAuthors=null, authorNote=
LIAO Siming, postgraduate, majors in satellite navigation and positioning, and differential code bias estimation, E-mail: 2216063152@qq.com
, correspAuthorsNote=null, copyrightStatement=
All rights reserved. Unauthorized reproduction is prohibited., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322506310726299749, articleId=1322506304959131734, tenantId=1146029695717560320, journalId=1281212831689347082, language=CN, title=基于LR-KF-LSTM模型的差分码偏差预测分析, columnId=1322506169105633839, journalTitle=大地测量与地球动力学, columnName=现代大地测量, runingTitle=null, highlight=null, articleAbstract=
差分码偏差(DCB)的存在会影响电离层总电子含量(TEC)计算的精度和伪距观测精度,从而影响导航定位授时和气象研究的结果。为了准确估算DCB,分析了2021—2022年中国科学院给出的全球定位系统(GPS)频间DCB数据的时序变化,提出一种LR-KF-LSTM组合模型对DCB进行准确预测并对预测结果进行分析。实验结果表明,该方法的预测结果的平均绝对百分比误差小于1.9%,平均绝对误差小于0.03 ns,均方根误差小于0.04 ns。与LSTM模型、BP神经网络模型及中国科学院(CAS)产品DCB值的对比显示,在不同太阳活动状态和不同磁场状态下,该组合模型预测性能均较优。该组合网络模型可以对卫星DCB进行有效预测,还能为解决CAS产品DCB数据存在的单日或多日缺失问题提供参考。
, authors=廖思明
1, 尚俊娜
1, 苏明坤
1, authorsList=廖思明, 尚俊娜, 苏明坤, authorCompany=null, correspAuthors=null, authorNote=
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版权所有,未经授权,不得转载。, copyrightOwner=大地测量与地球动力学编辑部, extLink=null, articleAbsUrl=null, sourceXml=vV9UPKQZB+6hdMHCvOXYIw==, magXml=CGn2R6OI3cL3Mk2EwlX9Gw==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=iJbC1Bm8Oz4Mq4d8NgQpsw==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=xxULsvcKIVGWYF2EUncfGg==, mapNumber=null, fund=null)}, authors=[Author(id=1322506311070232682, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=2216063152@qq.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1322506311149924460, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, authorId=1322506311070232682, language=EN, stringName=Siming LIAO, firstName=Siming, middleName=null, lastName=LIAO, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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Prediction flowchart of the LR-KF-LSTM model, figureFileSmall=gfIgc1iEAGGe+WMv5muEYA==, figureFileBig=iJbC1Bm8Oz4Mq4d8NgQpsw==, tableContent=null), ArticleFig(id=1322506314190794883, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=CN, label=图1, caption=
LR-KF-LSTM模型预测流程, figureFileSmall=gfIgc1iEAGGe+WMv5muEYA==, figureFileBig=iJbC1Bm8Oz4Mq4d8NgQpsw==, tableContent=null), ArticleFig(id=1322506314371149956, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=EN, label=Fig. 2, caption=
Relative errors of three models compared to CAS product DCB in different periods, figureFileSmall=Uyu+BCgjD8/pQRtPScw/lA==, figureFileBig=uf6wHJ9yPIaZXSrcqlMeZg==, tableContent=null), ArticleFig(id=1322506314429870213, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=CN, label=图2, caption=
不同时期3种模型与CAS产品DCB之间的相对误差, figureFileSmall=Uyu+BCgjD8/pQRtPScw/lA==, figureFileBig=uf6wHJ9yPIaZXSrcqlMeZg==, tableContent=null), ArticleFig(id=1322506314496979078, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=EN, label=Fig. 3, caption=
CDF plots of three models in different periods, figureFileSmall=JbfIdmk7ZDUHBltpR4+qxQ==, figureFileBig=jUwnEwb9a0gL3I2zm5dblg==, tableContent=null), ArticleFig(id=1322506314568282247, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=CN, label=图3, caption=
不同时期的3种模型CDF图, figureFileSmall=JbfIdmk7ZDUHBltpR4+qxQ==, figureFileBig=jUwnEwb9a0gL3I2zm5dblg==, tableContent=null), ArticleFig(id=1322506314647974024, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=EN, label=Fig. 4, caption=
Sunspot numbers under different solar activity conditions, figureFileSmall=VxaBYrlDINJVYEto2hkySQ==, figureFileBig=HxbRWmAE2zXHHW/hSbuvEw==, tableContent=null), ArticleFig(id=1322506314736054409, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=CN, label=图4, caption=
不同太阳活动状态太阳黑子数, figureFileSmall=VxaBYrlDINJVYEto2hkySQ==, figureFileBig=HxbRWmAE2zXHHW/hSbuvEw==, tableContent=null), ArticleFig(id=1322506314807357578, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=EN, label=Fig. 5, caption=
Relative errors for quiescent and active periods, figureFileSmall=vbo9qUATjJTf6LAV1IYN+w==, figureFileBig=AQre3lCErmNzaK3Y254Eag==, tableContent=null), ArticleFig(id=1322506314878660747, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=CN, label=图5, caption=
平静期和活跃期相对误差, figureFileSmall=vbo9qUATjJTf6LAV1IYN+w==, figureFileBig=AQre3lCErmNzaK3Y254Eag==, tableContent=null), ArticleFig(id=1322506314945769612, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=EN, label=Fig. 6, caption=
Relative errors for magnetic quiet and magnetic storm periods, figureFileSmall=KW4IrXNOm7OkdIqDjoz0vw==, figureFileBig=dal1amCQz5fOm+DDXrcwGA==, tableContent=null), ArticleFig(id=1322506315017072781, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=CN, label=图6, caption=
磁静期和磁暴期的相对误差, figureFileSmall=KW4IrXNOm7OkdIqDjoz0vw==, figureFileBig=dal1amCQz5fOm+DDXrcwGA==, tableContent=null), ArticleFig(id=1322506315113541775, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=EN, label=Tab. 1, caption=
Error statistics of three models
, figureFileSmall=null, figureFileBig=null, tableContent=
| LR-KF-LSTM | | LSTM | | BP |
| MAPE/% | MAE/ns | RMSE/ns | MAPE/% | MAE/ns | RMSE/ns | MAPE/% | MAE/ns | RMSE/ns |
| doy91 | 1.157 | 0.032 | 0.041 | | 1.787 | 0.057 | 0.081 | | 2.380 | 0.086 | 0.103 |
| doy182 | 1.949 | 0.031 | 0.043 | 2.246 | 0.059 | 0.077 | 2.329 | 0.064 | 0.076 |
| doy274 | 0.668 | 0.026 | 0.033 | 1.810 | 0.048 | 0.064 | 1.926 | 0.065 | 0.085 |
| doy001 | 0.646 | 0.015 | 0.020 | 1.196 | 0.036 | 0.047 | 1.999 | 0.059 | 0.071 |
), ArticleFig(id=1322506315218399376, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506304959131734, language=CN, label=表1, caption=
3种模型误差统计结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| LR-KF-LSTM | | LSTM | | BP |
| MAPE/% | MAE/ns | RMSE/ns | MAPE/% | MAE/ns | RMSE/ns | MAPE/% | MAE/ns | RMSE/ns |
| doy91 | 1.157 | 0.032 | 0.041 | | 1.787 | 0.057 | 0.081 | | 2.380 | 0.086 | 0.103 |
| doy182 | 1.949 | 0.031 | 0.043 | 2.246 | 0.059 | 0.077 | 2.329 | 0.064 | 0.076 |
| doy274 | 0.668 | 0.026 | 0.033 | 1.810 | 0.048 | 0.064 | 1.926 | 0.065 | 0.085 |
| doy001 | 0.646 | 0.015 | 0.020 | 1.196 | 0.036 | 0.047 | 1.999 | 0.059 | 0.071 |
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