Article(id=1322567028251148575, tenantId=1146029695717560320, journalId=1281212831689347082, issueId=1322567020940481144, articleNumber=null, orderNo=null, doi=10.14075/j.jgg.2025.06.201, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1750003200000, receivedDateStr=2025-06-16, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793254151642, onlineDateStr=2026-10-29, pubDate=1776182400000, pubDateStr=2026-04-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793254151642, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793254151642, creator=13701087609, updateTime=1793254151642, updator=13701087609, issue=Issue{id=1322567020940481144, tenantId=1146029695717560320, journalId=1281212831689347082, year='2026', volume='46', issue='4', pageStart='392', pageEnd='521', issueExtLink='null', onlineDate='null', pubDate='1776182400000', pubDateStr='2026-04-15', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793254149899, creator='13701087609', updateTime=1793254149899, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=487, endPage=496, ext={EN=ArticleExt(id=1322567029928870177, articleId=1322567028251148575, tenantId=1146029695717560320, journalId=1281212831689347082, language=EN, title=Near-Real Time Precise Orbit Determination Method for Low Earth Orbit Satellites Based on Sliding Window, columnId=null, journalTitle=Journal of Geodesy and Geodynamics, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Based on reduced-dynamic method, we utilize sliding window to achieve near-real time orbit calculation and recursive update for low Earth orbit satellites, and verify the accuracy and effectiveness of orbit determination. Taking the observation data of GRACE-FO and Swarm-B satellites from January 15 to 26, 2025 as an example, the results show that there is no significant systematic error in the tangential, normal, and radial orbit overlapping arc segments calculated using sliding window. Compared with the official released precise science orbit, the root mean square (RMS) of orbit difference in calculation part in three directions is all within 5 cm, and the residual RMS of satellite laser ranging (SLR) validations are 3.03 cm, 4.14 cm, and 3.15 cm, respectively. At a predicted arc length of 60 minutes, the average radial orbit RMS of three satellites is about 10 cm. In addition, changing the initial value of subsequent arc segment orbit from standard point positioning (SPP) to reusing the calculation and extrapolation result of previous arc segment orbit can shorten the single arc segment solution time from 10 minutes to 5 minutes.
, authors=Haoran GONG
1, 2, 3, Chen WANG
1, 2, 3, *, Chen REN
1, 2, 3, Zhenhong LI
1, 3, 4, authorsList=Haoran GONG, Chen WANG, Chen REN, Zhenhong LI, authorCompany=null, correspAuthors=Chen WANG, authorNote=null, 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=1322567032256708920, articleId=1322567028251148575, tenantId=1146029695717560320, journalId=1281212831689347082, language=CN, title=基于滑动窗口的低轨卫星近实时精密定轨方法, columnId=1281909276545356011, journalTitle=大地测量与地球动力学, columnName=大地测量学, runingTitle=null, highlight=null, articleAbstract=
基于简化动力学方法, 利用滑动窗口实现低轨卫星的近实时轨道解算和递推更新, 并验证定轨的精度和时效性。以2025-01-15-26的GRACE-FO系列卫星与Swarm-B卫星观测数据为例开展实验, 结果表明, 基于滑动窗口解算轨道的切向、法向和径向重叠弧段均无明显系统性误差。与官方发布的精密轨道相比, 解算部分轨道各方向差异的均方根(RMS)都在5 cm以内, 卫星激光测距(SLR)检核的残差RMS分别为3.03 cm、4.14 cm和3.15 cm。在60 min预报弧长下, 3颗卫星的径向轨道RMS均值约为10 cm。此外, 将后续弧段轨道初值由单点定位改为复用前一弧段的轨道解算和外推结果, 可将单弧段解算时间从10 min缩短至5 min。
, authors=龚浩冉
1, 2, 3, 王晨
1, 2, 3, *, 任琛
1, 2, 3, 李振洪
1, 3, 4, authorsList=龚浩冉, 王晨, 任琛, 李振洪, authorCompany=null, correspAuthors=王晨, authorNote=
, correspAuthorsNote=
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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=xWlshTthJ76mfng3gNKWAQ==, magXml=vsDX6lHqgXyVmr8mV4EWuA==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=prksXX8ZXbbj+D14L0ENQA==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=g5NRk2533j1hZ/gJb9oZ7Q==, mapNumber=null, fund=null)}, authors=[Author(id=1322567034412581191, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=gonghaoran@chd.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1322567034513244491, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, authorId=1322567034412581191, language=EN, stringName=Haoran GONG, firstName=Haoran, middleName=null, lastName=GONG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, 3, address=1 School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China
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1, 2, 3, address=1 长安大学地质工程与测绘学院, 西安, 710054
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龚浩冉, 硕士生, 主要从事卫星精密定轨研究, E-mail: gonghaoran@chd.edu.cn
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龚浩冉, 硕士生, 主要从事卫星精密定轨研究, E-mail: gonghaoran@chd.edu.cn
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1, 3, 4, address=1 School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China
3 State Key Laboratory of Loess Science, Xi'an 710054, China
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3 黄土科学全国重点实验室, 西安, 710054
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93 (11): 2315- 2334, articleTitle=Satellite Laser Ranging to Low Earth Orbiters: Orbit and Network Validation, refAbstract=null)], funds=[Fund(id=1322567041123467662, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, awardId=2023YFC3008402, language=CN, fundingSource=国家重点研发计划(2023YFC3008402), fundOrder=null, country=null), Fund(id=1322567041203159439, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, awardId=42304025, language=CN, fundingSource=国家自然科学基金(42304025), fundOrder=null, country=null), Fund(id=1322567041266074001, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, awardId=CHD300102264202, language=CN, fundingSource=中央高校基本科研业务费专项(CHD300102264202), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1322567032483201337, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, xref=null, ext=[AuthorCompanyExt(id=1322567032491589946, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, companyId=1322567032483201337, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1 School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China), AuthorCompanyExt(id=1322567032495784251, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, companyId=1322567032483201337, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1 长安大学地质工程与测绘学院, 西安, 710054)]), AuthorCompany(id=1322567032554504508, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, xref=null, ext=[AuthorCompanyExt(id=1322567032562893117, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, companyId=1322567032554504508, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2 Big Data Center for Geosciences and Satellites, Chang'an University, Xi'an 710054, China), AuthorCompanyExt(id=1322567032567087422, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, companyId=1322567032554504508, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2 长安大学地学与卫星大数据中心, 西安, 710054)]), AuthorCompany(id=1322567032625807679, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, xref=null, ext=[AuthorCompanyExt(id=1322567032634196288, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, companyId=1322567032625807679, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3 State Key Laboratory of Loess Science, Xi'an 710054, China), AuthorCompanyExt(id=1322567032646779201, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, companyId=1322567032625807679, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3 黄土科学全国重点实验室, 西安, 710054)]), AuthorCompany(id=1322567034332889411, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, xref=null, ext=[AuthorCompanyExt(id=1322567034337083716, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, companyId=1322567034332889411, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=4 Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Xi'an 710054, China), AuthorCompanyExt(id=1322567034345472325, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, companyId=1322567034332889411, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=4 西部矿产资源与地质工程教育部重点实验室, 西安, 710054)])], figs=[ArticleFig(id=1322567036283240810, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Fig. 1, caption=
Workflow of near-real time POD for LEO satellite, figureFileSmall=LQDu1eH3lhX1pgNsQIucIA==, figureFileBig=prksXX8ZXbbj+D14L0ENQA==, tableContent=null), ArticleFig(id=1322567036346155371, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=图1, caption=
LEO卫星近实时精密定轨流程, figureFileSmall=LQDu1eH3lhX1pgNsQIucIA==, figureFileBig=prksXX8ZXbbj+D14L0ENQA==, tableContent=null), ArticleFig(id=1322567036614590828, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Fig. 2, caption=
Schematic diagram of sliding window orbit determination, figureFileSmall=gnfC+n1aolQXwpbDjlmskA==, figureFileBig=GHn9R4CIQixsITTBsEpVKQ==, tableContent=null), ArticleFig(id=1322567036698476909, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=图2, caption=
滑动窗口定轨示意图, figureFileSmall=gnfC+n1aolQXwpbDjlmskA==, figureFileBig=GHn9R4CIQixsITTBsEpVKQ==, tableContent=null), ArticleFig(id=1322567036786557294, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Fig. 3, caption=
Time series of orbit determination residual for GRACE-FO satellites and Swarm-B satellite, figureFileSmall=KzlybHPGFBQcq30ON0yyUA==, figureFileBig=cbVdVRlwrfd7dJjYVl19Xw==, tableContent=null), ArticleFig(id=1322567037038215535, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=图3, caption=
GRACE-FO系列卫星和Swarm-B卫星定轨残差时序, figureFileSmall=KzlybHPGFBQcq30ON0yyUA==, figureFileBig=cbVdVRlwrfd7dJjYVl19Xw==, tableContent=null), ArticleFig(id=1322567037138878832, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Fig. 4, caption=
RMS time series of orbit overlapping arc segment during the test period, figureFileSmall=jlBzr4HhKJ+qXj5LrgyIgw==, figureFileBig=YDGDwGBltX6xUjpyf0AUNA==, tableContent=null), ArticleFig(id=1322567038824989041, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=图4, caption=
测试时段的轨道重叠弧段RMS时序, figureFileSmall=jlBzr4HhKJ+qXj5LrgyIgw==, figureFileBig=YDGDwGBltX6xUjpyf0AUNA==, tableContent=null), ArticleFig(id=1322567038959206770, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Fig. 5, caption=
RMS time series of near-real time precise orbit determination results and the science orbit, figureFileSmall=yy1wd5VwVDOJELDw115qDw==, figureFileBig=3/cM/X5T81cNmsEmgNdFuQ==, tableContent=null), ArticleFig(id=1322567039051481459, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=图5, caption=
近实时精密定轨结果与科学轨道比较的RMS时序, figureFileSmall=yy1wd5VwVDOJELDw115qDw==, figureFileBig=3/cM/X5T81cNmsEmgNdFuQ==, tableContent=null), ArticleFig(id=1322567039122784628, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Fig. 6, caption=
RMS time series of the predicted orbit of GRACE-C satellite and the science orbit, figureFileSmall=/t9nes6iYs6tynD/cEy7Ww==, figureFileBig=TCssIZ1Th7Pi82yx1IETXw==, tableContent=null), ArticleFig(id=1322567039206670709, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=图6, caption=
GRACE-C卫星预报轨道与科学轨道比较的RMS时序, figureFileSmall=/t9nes6iYs6tynD/cEy7Ww==, figureFileBig=TCssIZ1Th7Pi82yx1IETXw==, tableContent=null), ArticleFig(id=1322567039273779574, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Fig. 7, caption=
RMS time series of the predicted orbit of GRACE-D satellite and the science orbit, figureFileSmall=hQflq2LRs9wsQ4dbcsPtdg==, figureFileBig=hB+dtppFSfMbj831hn5obA==, tableContent=null), ArticleFig(id=1322567039353471351, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=图7, caption=
GRACE-D卫星预报轨道与科学轨道比较的RMS时序, figureFileSmall=hQflq2LRs9wsQ4dbcsPtdg==, figureFileBig=hB+dtppFSfMbj831hn5obA==, tableContent=null), ArticleFig(id=1322567039441551736, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Fig. 8, caption=
RMS time series of the predicted orbit of Swarm-B satellite and the science orbit, figureFileSmall=Of0yt1NWkB04SFR5Y5D4hw==, figureFileBig=+3oZdhQFEl02V6gQbFsIPA==, tableContent=null), ArticleFig(id=1322567039521243513, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=图8, caption=
Swarm-B卫星预报轨道与科学轨道比较的RMS时序, figureFileSmall=Of0yt1NWkB04SFR5Y5D4hw==, figureFileBig=+3oZdhQFEl02V6gQbFsIPA==, tableContent=null), ArticleFig(id=1322567039592546682, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Fig. 9, caption=
Time series of SLR validation residuals for GRACE-C, GRACE-D and Swarm-B satellites, figureFileSmall=BIQKwq723r6kYxHaW0pNdA==, figureFileBig=qh/eNhYQ8YdgsdktlG0Zow==, tableContent=null), ArticleFig(id=1322567039655461243, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=图9, caption=
GRACE-C、GRACE-D和Swarm-B卫星SLR检核残差时序, figureFileSmall=BIQKwq723r6kYxHaW0pNdA==, figureFileBig=qh/eNhYQ8YdgsdktlG0Zow==, tableContent=null), ArticleFig(id=1322567039709987196, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Fig. 10, caption=
RMS of experimental results with different strategies and the science orbit, figureFileSmall=ec5nIKHiHVbRhqCOAfVaSw==, figureFileBig=uFqFI7excfWMjQh3RsY8fw==, tableContent=null), ArticleFig(id=1322567039777096061, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=图10, caption=
不同策略下实验结果与科学轨道比较的RMS, figureFileSmall=ec5nIKHiHVbRhqCOAfVaSw==, figureFileBig=uFqFI7excfWMjQh3RsY8fw==, tableContent=null), ArticleFig(id=1322567039852593534, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Fig. 11, caption=
Time series of computation durations with different experimental strategies, figureFileSmall=Sz4QBWuX0ZmouO121dO7Sg==, figureFileBig=QPvAXKJGY0kVJv9Tib+5Nw==, tableContent=null), ArticleFig(id=1322567039932285311, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=图11, caption=
不同实验策略的计算时长时序, figureFileSmall=Sz4QBWuX0ZmouO121dO7Sg==, figureFileBig=QPvAXKJGY0kVJv9Tib+5Nw==, tableContent=null), ArticleFig(id=1322567039991005568, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Tab. 1, caption=
Data sources related to LEO satellite orbit determination
, figureFileSmall=null, figureFileBig=null, tableContent=
), ArticleFig(id=1322567040049725825, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=表1, caption=
LEO卫星定轨相关数据来源
, figureFileSmall=null, figureFileBig=null, tableContent=
), ArticleFig(id=1322567040133611906, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Tab. 2, caption=
Strategies and parameter configurations for near-real time POD
, figureFileSmall=null, figureFileBig=null, tableContent=
| 类别 | 描述 |
| 摄动力模型 | 地球重力场模型 | EGM2008[21](120×120) |
| N体引力 | JPL DE405[22] |
| 固体潮 | TIDE2010 |
| 海潮 | FES2004 (30×30) |
| 极潮 | IERS 2010 (30×30) |
| 太阳光压 | 卫星宏模型[14] |
| 大气阻力 | DTM94[23] |
| 相对论效应 | IERS 2010[24] |
| 观测模型与改正项 | GPS天线相位模型 | igs20.atx |
| 卫星截止高度角 | 0° |
| 电离层改正 | 非差无电离层组合 |
| 相位中心偏差改正 | GRACE-FO PCO+PCV[25] Swarm-B PCO+PCV[3] |
| 参数估计 | 卫星状态 | 初始位置与速度矢量 |
| 大气阻力系数 | 松约束:6 h/8 h/12 h计算1次紧约束:1.5 h计算1次 |
| 太阳光压系数 | 各定轨弧段计算1个 |
| 经验加速度参数 | 切向、法向(常数项和余弦项) 松约束:6 h/8 h/12 h计算1次紧约束:1.5 h计算1次 |
| 接收机钟差 | 逐历元估计 |
), ArticleFig(id=1322567040204915075, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=表2, caption=
近实时精密定轨策略与参数配置
, figureFileSmall=null, figureFileBig=null, tableContent=
| 类别 | 描述 |
| 摄动力模型 | 地球重力场模型 | EGM2008[21](120×120) |
| N体引力 | JPL DE405[22] |
| 固体潮 | TIDE2010 |
| 海潮 | FES2004 (30×30) |
| 极潮 | IERS 2010 (30×30) |
| 太阳光压 | 卫星宏模型[14] |
| 大气阻力 | DTM94[23] |
| 相对论效应 | IERS 2010[24] |
| 观测模型与改正项 | GPS天线相位模型 | igs20.atx |
| 卫星截止高度角 | 0° |
| 电离层改正 | 非差无电离层组合 |
| 相位中心偏差改正 | GRACE-FO PCO+PCV[25] Swarm-B PCO+PCV[3] |
| 参数估计 | 卫星状态 | 初始位置与速度矢量 |
| 大气阻力系数 | 松约束:6 h/8 h/12 h计算1次紧约束:1.5 h计算1次 |
| 太阳光压系数 | 各定轨弧段计算1个 |
| 经验加速度参数 | 切向、法向(常数项和余弦项) 松约束:6 h/8 h/12 h计算1次紧约束:1.5 h计算1次 |
| 接收机钟差 | 逐历元估计 |
), ArticleFig(id=1322567040292995460, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Tab. 3, caption=
Statistics of mean RMS of orbit overlapping arc segment during the test period
, figureFileSmall=null, figureFileBig=null, tableContent=
| 低轨卫星轨道 | 切向/mm | 法向/mm | 径向/mm | 三维方向/mm |
| POD_GRACE-C | 7.35 | 5.61 | 4.26 | 10.30 |
| POD_GRACE-D | 7.52 | 5.53 | 4.13 | 10.32 |
| POD_ Swarm-B | 8.69 | 6.45 | 5.29 | 12.13 |
), ArticleFig(id=1322567040376881541, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=表3, caption=
测试时段的轨道重叠弧段RMS均值统计
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| 低轨卫星轨道 | 切向/mm | 法向/mm | 径向/mm | 三维方向/mm |
| POD_GRACE-C | 7.35 | 5.61 | 4.26 | 10.30 |
| POD_GRACE-D | 7.52 | 5.53 | 4.13 | 10.32 |
| POD_ Swarm-B | 8.69 | 6.45 | 5.29 | 12.13 |
), ArticleFig(id=1322567040452379014, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Tab. 4, caption=
Statistics of mean RMS of near-real time precise orbit determination results and the science orbit
, figureFileSmall=null, figureFileBig=null, tableContent=
| 低轨卫星 | 卫星轨道 | 切向/cm | 法向/cm | 径向/cm | 三维方向/cm |
| GRACE-C | SPP_GRACE-C | 529.7 | 432.1 | 1 213.0 | 1 392.4 |
| POD_GRACE-C | 2.16 | 0.93 | 1.00 | 2.56 |
| GRACE-D | SPP_GRACE-D | 644.7 | 525.7 | 1 336.7 | 1 574.4 |
| POD_GRACE-D | 2.36 | 1.40 | 1.05 | 2.95 |
| Swarm-B | SPP_Swarm-B | 510.2 | 316.0 | 1 369.7 | 1 495.4 |
| POD_ Swarm-B | 2.56 | 1.54 | 1.11 | 3.21 |
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近实时精密定轨结果与科学轨道比较的RMS均值统计
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| 低轨卫星 | 卫星轨道 | 切向/cm | 法向/cm | 径向/cm | 三维方向/cm |
| GRACE-C | SPP_GRACE-C | 529.7 | 432.1 | 1 213.0 | 1 392.4 |
| POD_GRACE-C | 2.16 | 0.93 | 1.00 | 2.56 |
| GRACE-D | SPP_GRACE-D | 644.7 | 525.7 | 1 336.7 | 1 574.4 |
| POD_GRACE-D | 2.36 | 1.40 | 1.05 | 2.95 |
| Swarm-B | SPP_Swarm-B | 510.2 | 316.0 | 1 369.7 | 1 495.4 |
| POD_ Swarm-B | 2.56 | 1.54 | 1.11 | 3.21 |
), ArticleFig(id=1322567040607568264, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Tab. 5, caption=
Statistics of mean RMS of the predicted orbits and the science orbit
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| 低轨卫星 | 预报时长/min | 切向/cm | 法向/cm | 径向/cm | 三维方向/cm |
| GRACE-C | 20 | 7.26 | 1.33 | 6.59 | 10.23 |
| 40 | 18.50 | 1.65 | 9.16 | 20.94 |
| 60 | 31.16 | 1.83 | 10.17 | 33.01 |
| GRACE-D | 20 | 6.29 | 1.63 | 5.22 | 8.74 |
| 40 | 15.61 | 1.80 | 8.08 | 17.95 |
| 60 | 26.98 | 1.93 | 9.25 | 28.79 |
| Swarm-B | 20 | 9.49 | 1.96 | 8.29 | 13.16 |
| 40 | 23.74 | 2.35 | 10.42 | 26.74 |
| 60 | 37.53 | 2.52 | 11.17 | 39.44 |
), ArticleFig(id=1322567040691454345, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=表5, caption=
预报轨道与科学轨道比较的RMS均值统计
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| 低轨卫星 | 预报时长/min | 切向/cm | 法向/cm | 径向/cm | 三维方向/cm |
| GRACE-C | 20 | 7.26 | 1.33 | 6.59 | 10.23 |
| 40 | 18.50 | 1.65 | 9.16 | 20.94 |
| 60 | 31.16 | 1.83 | 10.17 | 33.01 |
| GRACE-D | 20 | 6.29 | 1.63 | 5.22 | 8.74 |
| 40 | 15.61 | 1.80 | 8.08 | 17.95 |
| 60 | 26.98 | 1.93 | 9.25 | 28.79 |
| Swarm-B | 20 | 9.49 | 1.96 | 8.29 | 13.16 |
| 40 | 23.74 | 2.35 | 10.42 | 26.74 |
| 60 | 37.53 | 2.52 | 11.17 | 39.44 |
), ArticleFig(id=1322567040775340426, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Tab. 6, caption=
Statistics of SLR validation residuals
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| 低轨卫星 | 卫星轨道 | AVG/cm | STD/cm | RMS/cm |
| GRACE-C | POD_GRACE-C | -1.40 | 2.69 | 3.03 |
| PRE_GRACE-C | -5.91 | 13.79 | 15.00 |
| GRACE-D | POD_GRACE-D | -1.18 | 3.97 | 4.14 |
| PRE_GRACE-D | -1.07 | 12.69 | 12.74 |
| Swarm-B | POD_ Swarm-B | -1.16 | 2.93 | 3.15 |
| PRE_Swarm-B | -7.52 | 15.03 | 16.81 |
), ArticleFig(id=1322567040855032203, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=表6, caption=
SLR检核残差统计
, figureFileSmall=null, figureFileBig=null, tableContent=
| 低轨卫星 | 卫星轨道 | AVG/cm | STD/cm | RMS/cm |
| GRACE-C | POD_GRACE-C | -1.40 | 2.69 | 3.03 |
| PRE_GRACE-C | -5.91 | 13.79 | 15.00 |
| GRACE-D | POD_GRACE-D | -1.18 | 3.97 | 4.14 |
| PRE_GRACE-D | -1.07 | 12.69 | 12.74 |
| Swarm-B | POD_ Swarm-B | -1.16 | 2.93 | 3.15 |
| PRE_Swarm-B | -7.52 | 15.03 | 16.81 |
), ArticleFig(id=1322567040934723980, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=EN, label=Tab. 7, caption=
Experimental strategy settings based on different initial orbit sources and loose constraint intervals
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| 初轨来源 | 松约束参数估计间隔 | 定轨弧段 |
| 实验1 | SPP | 6 h | 2025-01-20 00:00—21:23,共24组 |
| 实验2 | SPP | 8 h |
| 实验3 | SPP | 12 h |
| 实验4 | 前一弧段解算及外推轨道 | 12 h |
), ArticleFig(id=1322567041001832845, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322567028251148575, language=CN, label=表7, caption=
基于不同初轨来源及松约束间隔的实验策略设置
, figureFileSmall=null, figureFileBig=null, tableContent=
| 初轨来源 | 松约束参数估计间隔 | 定轨弧段 |
| 实验1 | SPP | 6 h | 2025-01-20 00:00—21:23,共24组 |
| 实验2 | SPP | 8 h |
| 实验3 | SPP | 12 h |
| 实验4 | 前一弧段解算及外推轨道 | 12 h |
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