Article(id=1322506394998264760, tenantId=1146029695717560320, journalId=1281212831689347082, issueId=1322506263716541212, articleNumber=null, orderNo=null, doi=10.14075/j.jgg.2024.08.409, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1724083200000, receivedDateStr=2024-08-20, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793239695548, onlineDateStr=2026-10-29, pubDate=1757865600000, pubDateStr=2025-09-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793239695548, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793239695548, creator=13701087609, updateTime=1793239695548, 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=910, endPage=914, ext={EN=ArticleExt(id=1322506395182814137, articleId=1322506394998264760, tenantId=1146029695717560320, journalId=1281212831689347082, language=EN, title=Research on Enhancing the Positioning Performance of Smartphones with Low-Earth Orbit Satellites, columnId=null, journalTitle=Journal of Geodesy and Geodynamics, columnName=null, runingTitle=null, highlight=null, articleAbstract=
To address the issues of large pseudorange measurement noise, discontinuous observation data, weak geometric strength in smartphone GNSS observations, and high noise levels in the built-in micro inertial measurement unit(MIMU) of smartphones, a tightly coupled GNSS/MIMU navigation method enhanced by low-Earth orbit(LEO) satellites is proposed. Based on the characteristics of the Walker constellation and the Keplerian orbital parameters of LEO satellites, LEO pseudorange observation data are simulated. The positioning performance of smartphone GNSS single-point positioning, GNSS/MIMU tight integration, and LEO-enhanced GNSS/MIMU tight integration are compared and analyzed. Real smartphone data are used for validation. The experimental results show that after incorporating LEO satellites, the average number of visible satellites increases by about 7. The faster movement speed of LEO satellites further optimizes the GNSS geometric strength, reducing the average PDOP value by 50%. Compared with GNSS single-point positioning, the GNSS/MIMU tight integration improves positioning accuracy in the east, north, and up directions by 18%, 23%, and 10%, respectively. The LEO-enhanced GNSS/MIMU tight integration improves positioning accuracy in the east, north, and up directions by 73%, 81%, and 60% compared with GNSS single-point positioning, and by 67%, 75%, and 56% compared with GNSS/MIMU tight integration.
, authors=Hui XIE
1, Youlong WU
2, *, Guoli LI
1, Shuai CHEN
3, authorsList=Hui XIE, Youlong WU, Guoli LI, Shuai CHEN, authorCompany=null, correspAuthors=Youlong WU, authorNote=
XIE Hui, lecturer, majors in satellite navigation and positioning technology and Internet of Things application technology, E-mail: xiehui@jit.edu.cn
, 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=1322506398588588997, articleId=1322506394998264760, tenantId=1146029695717560320, journalId=1281212831689347082, language=CN, title=低轨卫星增强智能手机定位性能研究, 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=
针对智能手机伪距观测噪声大、观测数据不连续、几何强度弱以及内置微惯性测量单元(micro inertial measurement unit, MIMU)的噪声水平大等问题,提出一种基于低轨(low earth orbit, LEO)卫星增强的智能手机GNSS/MIMU紧组合导航方法。根据Walker星座特点和低轨开普勒轨道参数,仿真生成LEO伪距观测数据,对比研究智能手机GNSS单点定位、GNSS/MIMU紧组合和LEO增强的GNSS/MIMU紧组合的定位性能,并通过实测手机数据进行验证。实验结果表明,引入LEO卫星后,平均可见卫星数增加约7颗,LEO卫星更快的运行速度进一步优化了GNSS的几何强度,PDOP平均值降低50%;GNSS/MIMU紧组合相较于GNSS单点定位,东、北、天方向上的定位精度分别提升18%、23%、10%;LEO增强的GNSS/MIMU紧组合相较于GNSS单点定位,东、北、天方向上定位精度分别提升73%、81%、60%,而相较于GNSS/MIMU紧组合分别提升67%、75%、56%。
, authors=谢慧
1, 吴有龙
2, *, 李国利
1, 陈帅
3, authorsList=谢慧, 吴有龙, 李国利, 陈帅, authorCompany=null, correspAuthors=吴有龙, authorNote=
, correspAuthorsNote=
吴有龙,博士,副教授,主要研究方向为卫星导航定位技术、惯性导航技术,E-mail: youlong_wu@jit.edu.cn
WU Youlong, PhD, associate professor, majors in satellite navigation and positioning technology, and inertial navigation technology, E-mail: youlong_wu@jit.edu.cn
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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=yvwa3pyUURqeblDB7mbNDQ==, magXml=p+UJBrPw1P/rDU5jTIWrKA==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=zdavT9uvX7ciYEr6pFPG2g==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=RarUkGUxZJQAbghVprTcgg==, mapNumber=null, fund=null)}, authors=[Author(id=1322506399670719440, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=xiehui@jit.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1322506399737828306, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, authorId=1322506399670719440, language=EN, stringName=Hui XIE, firstName=Hui, middleName=null, lastName=XIE, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=1 School of Mechanical and Electrical Engineering, Jinling Institute of Technology, 99 Hongjing Road, Nanjing 211169, China, bio={"content":"
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1, address=1 金陵科技学院机电工程学院,南京市弘景大道99号,211169, bio={"content":"
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谢慧,讲师,主要研究方向为卫星导航定位技术及物联网应用技术,E-mail: xiehui@jit.edu.cn
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Experimental equipment and trajectory, figureFileSmall=HKywoWQypcJjFlmCYZ7xXA==, figureFileBig=zdavT9uvX7ciYEr6pFPG2g==, tableContent=null), ArticleFig(id=1322506403537867759, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=CN, label=图1, caption=
实验设备和运动轨迹, figureFileSmall=HKywoWQypcJjFlmCYZ7xXA==, figureFileBig=zdavT9uvX7ciYEr6pFPG2g==, tableContent=null), ArticleFig(id=1322506403739194352, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=EN, label=Fig. 2, caption=
Sky plots for GNSS and LEO, figureFileSmall=NBm4ZxinqqCvxA+LTey7Sg==, figureFileBig=eUVr6sC8uQWR37dpm4aIEg==, tableContent=null), ArticleFig(id=1322506403814691825, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=CN, label=图2, caption=
GNSS星空图和LEO星空图, figureFileSmall=NBm4ZxinqqCvxA+LTey7Sg==, figureFileBig=eUVr6sC8uQWR37dpm4aIEg==, tableContent=null), ArticleFig(id=1322506403911160818, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=EN, label=Fig. 3, caption=
The number of visible satellites and PDOP values, figureFileSmall=eJD5u3gMesjmNrDyjOsjVg==, figureFileBig=K0UQLSar56DhFdYu7//ORg==, tableContent=null), ArticleFig(id=1322506404007629811, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=CN, label=图3, caption=
可见卫星数和PDOP值, figureFileSmall=eJD5u3gMesjmNrDyjOsjVg==, figureFileBig=K0UQLSar56DhFdYu7//ORg==, tableContent=null), ArticleFig(id=1322506404095710196, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=EN, label=Fig. 4, caption=
Signal-to-noise ratio (SNR) of satellite signals, figureFileSmall=RzH+jBbESiezHt9oYK87Ew==, figureFileBig=Fzo0WFI0XHLMj2p+NJP5rw==, tableContent=null), ArticleFig(id=1322506404179596277, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=CN, label=图4, caption=
卫星信号载噪比, figureFileSmall=RzH+jBbESiezHt9oYK87Ew==, figureFileBig=Fzo0WFI0XHLMj2p+NJP5rw==, tableContent=null), ArticleFig(id=1322506404271870966, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=EN, label=Fig. 5, caption=
The positioning errors, figureFileSmall=qGzZ2QaOu4a9I0KiLR6LgA==, figureFileBig=ccUGMJxtS/QqTTSvcsqTXg==, tableContent=null), ArticleFig(id=1322506404355757047, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=CN, label=图5, caption=
定位误差, figureFileSmall=qGzZ2QaOu4a9I0KiLR6LgA==, figureFileBig=ccUGMJxtS/QqTTSvcsqTXg==, tableContent=null), ArticleFig(id=1322506404439643128, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=EN, label=Tab. 1, caption=
State vectors for navigation system
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| 状态量 | 索引 | 描述 |
| δr | 1~3 | 位置误差矢量 |
| δv | 4~6 | 速度误差矢量 |
| ψ | 7~9 | 姿态误差矢量 |
| ba | 10~12 | 陀螺仪零偏 |
| bg | 13~15 | 加速度计零偏 |
| δtGNSS | 16~17 | GPS/BDS接收机钟差 |
| $ \delta \dot{\boldsymbol{t}}_{\mathrm{GNSS}}$ | 18~19 | GPS/BDS接收机钟漂 |
| $ \delta \boldsymbol{t}_{\mathrm{LEO}}$ | 20 | LEO接收机钟差 |
| $ \delta \dot{\boldsymbol{t}}_{\mathrm{LEO}}$ | 21 | LEO接收机钟漂 |
), ArticleFig(id=1322506404506751993, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=CN, label=表1, caption=
导航系统状态向量
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| 状态量 | 索引 | 描述 |
| δr | 1~3 | 位置误差矢量 |
| δv | 4~6 | 速度误差矢量 |
| ψ | 7~9 | 姿态误差矢量 |
| ba | 10~12 | 陀螺仪零偏 |
| bg | 13~15 | 加速度计零偏 |
| δtGNSS | 16~17 | GPS/BDS接收机钟差 |
| $ \delta \dot{\boldsymbol{t}}_{\mathrm{GNSS}}$ | 18~19 | GPS/BDS接收机钟漂 |
| $ \delta \boldsymbol{t}_{\mathrm{LEO}}$ | 20 | LEO接收机钟差 |
| $ \delta \dot{\boldsymbol{t}}_{\mathrm{LEO}}$ | 21 | LEO接收机钟漂 |
), ArticleFig(id=1322506404582249467, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=EN, label=Tab. 2, caption=
Performance indicators of Xiaomi 8 and NovAtel KVH-1750
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| IMU | 小米ICM20690 | 诺瓦泰KVH-1750 |
| 陀螺噪声 | 14.4°/$ \sqrt{\mathrm{h}}$ | 0.012°/$ \sqrt{\mathrm{h}}$ |
| 陀螺零偏 | 1°/s | 0.05°/h |
| 加速度计零偏 | 40 mg | 0.05 mg |
| 加速度计噪声 | 100 μg/$ \sqrt{\mathrm{Hz}}$ | 0.12 mg/$ \sqrt{\mathrm{Hz}}$ |
| 采样频率 | 100 Hz | 200 Hz |
), ArticleFig(id=1322506404653552636, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=CN, label=表2, caption=
小米8和诺瓦泰KVH-1750性能指标
, figureFileSmall=null, figureFileBig=null, tableContent=
| IMU | 小米ICM20690 | 诺瓦泰KVH-1750 |
| 陀螺噪声 | 14.4°/$ \sqrt{\mathrm{h}}$ | 0.012°/$ \sqrt{\mathrm{h}}$ |
| 陀螺零偏 | 1°/s | 0.05°/h |
| 加速度计零偏 | 40 mg | 0.05 mg |
| 加速度计噪声 | 100 μg/$ \sqrt{\mathrm{Hz}}$ | 0.12 mg/$ \sqrt{\mathrm{Hz}}$ |
| 采样频率 | 100 Hz | 200 Hz |
), ArticleFig(id=1322506404745827325, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=EN, label=Tab. 3, caption=
The number of visible satellites and PDOP values
, figureFileSmall=null, figureFileBig=null, tableContent=
| 指标 | BDS+GPS | | LEO+ BDS+GPS |
| 最大值 | 最小值 | 平均值 | 最大值 | 最小值 | 平均值 |
| NVS | 16 | 11 | 13.1 | | 24 | 17 | 20.5 |
| PDOP | 3.5 | 1.3 | 2.0 | 1.3 | 0.8 | 1.0 |
), ArticleFig(id=1322506404825519102, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=CN, label=表3, caption=
可见卫星数与PDOP值
, figureFileSmall=null, figureFileBig=null, tableContent=
| 指标 | BDS+GPS | | LEO+ BDS+GPS |
| 最大值 | 最小值 | 平均值 | 最大值 | 最小值 | 平均值 |
| NVS | 16 | 11 | 13.1 | | 24 | 17 | 20.5 |
| PDOP | 3.5 | 1.3 | 2.0 | 1.3 | 0.8 | 1.0 |
), ArticleFig(id=1322506404905210879, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=EN, label=Tab. 4, caption=
Positioning errors RMS statistics
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| 定位方法 | RMS/m |
| 东向 | 北向 | 天向 |
| GNSS单点定位 | 6.4 | 11.2 | 42.0 |
| GNSS/MIMU组合导航 | 5.2 | 8.6 | 37.7 |
| 低轨卫星增强组合导航 | 1.8 | 2.1 | 16.6 |
), ArticleFig(id=1322506404997485568, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506394998264760, language=CN, label=表4, caption=
定位误差RMS统计
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| 定位方法 | RMS/m |
| 东向 | 北向 | 天向 |
| GNSS单点定位 | 6.4 | 11.2 | 42.0 |
| GNSS/MIMU组合导航 | 5.2 | 8.6 | 37.7 |
| 低轨卫星增强组合导航 | 1.8 | 2.1 | 16.6 |
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