Article(id=1322506396353016411, tenantId=1146029695717560320, journalId=1281212831689347082, issueId=1322506335908901129, articleNumber=null, orderNo=null, doi=10.14075/j.jgg.2024.10.493, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1730304000000, receivedDateStr=2024-10-31, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793239695870, onlineDateStr=2026-10-29, pubDate=1760457600000, pubDateStr=2025-10-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793239695870, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793239695870, creator=13701087609, updateTime=1793239695870, updator=13701087609, issue=Issue{id=1322506335908901129, tenantId=1146029695717560320, journalId=1281212831689347082, year='2025', volume='45', issue='10', pageStart='991', pageEnd='1100', issueExtLink='null', onlineDate='null', pubDate='1760457600000', pubDateStr='2025-10-15', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793239681460, creator='13701087609', updateTime=1793244369709, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322525999896576487, tenantId=1146029695717560320, journalId=1281212831689347082, issueId=1322506335908901129, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322525999896576488, tenantId=1146029695717560320, journalId=1281212831689347082, issueId=1322506335908901129, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1037, endPage=1042, ext={EN=ArticleExt(id=1322506396684366428, articleId=1322506396353016411, tenantId=1146029695717560320, journalId=1281212831689347082, language=EN, title=Soil Moisture Retrieval Based on FY-3E GNOS Reflection Measurement, columnId=null, journalTitle=Journal of Geodesy and Geodynamics, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Based on nearly one year of GNSS-R data from the GNSS occultation sounder Ⅱ(GNOS-Ⅱ) onboard the Fengyun-3E(FY-3E) satellite, this study conducted global soil moisture inversion modeling and evaluated the inversion results from different satellite systems and their combined observations. The results indicate that there are systematic biases in the reflectivity distributions calibrated by the reflected signals of BDS, GPS, and Galileo. However, the inversion results based on different systems have similar accuracy. The predicted soil moisture values show good consistency with the level 3 soil moisture products provided by the SMAP satellite, with a correlation coefficient of 0.855 and an unbiased root mean square error of 0.063 cm3/cm3. When combining different systems for inversion, the cumulative distribution function matching method was used to recalibrate the effective reflectivity of each satellite system's observations, which further improved the accuracy of surface soil moisture inversion.
, authors=Dai CHEN
1, Zhounan DONG
1, *, authorsList=Dai CHEN, Zhounan DONG, authorCompany=null, correspAuthors=Zhounan DONG, authorNote=
CHEN Dai, postgraduate, majors in GNSS reflectometry and applications, E-mail: cd20010930@163.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=1322506399712653929, articleId=1322506396353016411, tenantId=1146029695717560320, journalId=1281212831689347082, language=CN, title=基于FY-3E GNOS反射测量的土壤湿度反演, 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=
基于风云三号E星(FY-3E)搭载的GNSS掩星探测仪-Ⅱ型(GNSS occultation sounder Ⅱ,GNOS-Ⅱ)近1 a的GNSS-R数据,开展全球土壤湿度的反演建模,评估不同卫星系统及其组合观测的反演结果。研究结果表明,BDS、GPS和Galileo反射信号标定的反射率分布存在系统性偏差,但基于不同系统的观测反演结果精度相似,其预测的土壤湿度与SMAP卫星提供的L3级土壤湿度产品表现出良好的一致性,相关系数达到0.855,无偏均方根误差为0.063 cm3/cm3。在组合不同系统进行反演时,采用累积分布函数匹配法对各卫星系统观测的有效反射率进行重标定,能够进一步提升地表土壤湿度反演的精度。
, authors=陈岱
1, 董州楠
1, *, authorsList=陈岱, 董州楠, authorCompany=null, correspAuthors=董州楠, 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=6BERZzQqQtErH5/AIFX4VQ==, magXml=rcOWEYXmSy2QJI2j1wcYMQ==, pdfUrl=null, pdf=GO6vyEGuX4ZouC8DNGjOpw==, pdfFileSize=5760194, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=+DRwhFWInj6hLywFo+z4rg==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=kgS0uwX3Hf1DiyfR9Q3RMg==, mapNumber=null, fund=null)}, authors=[Author(id=1322506400039809646, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=cd20010930@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1322506400136278640, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, authorId=1322506400039809646, language=EN, stringName=Dai CHEN, firstName=Dai, middleName=null, lastName=CHEN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=1 School of Geography Science and Geomatics Engineering, Suzhou University of Science and Technology, 99 Xuefu Road, Suzhou 215009, China, bio={"content":"
CHEN Dai, postgraduate, majors in GNSS reflectometry and applications, E-mail: cd20010930@163.com
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1, address=1 苏州科技大学地理科学与测绘工程学院,苏州市学府路99号, 215009, bio={"content":"
陈岱,硕士生,主要研究方向为全球卫星导航反射测量遥感与应用,E-mail: cd20010930@163.com
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陈岱,硕士生,主要研究方向为全球卫星导航反射测量遥感与应用,E-mail: cd20010930@163.com
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FY-3E GNOS-R surface specular point trajectories from June 1 to 3, 2023, figureFileSmall=IkyKv4KIQNkKO24uByoX2A==, figureFileBig=+DRwhFWInj6hLywFo+z4rg==, tableContent=null), ArticleFig(id=1322506403009376901, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=CN, label=图1, caption=
2023-06-01—03 FY-3E GNOS-R观测镜面点地表轨迹点, figureFileSmall=IkyKv4KIQNkKO24uByoX2A==, figureFileBig=+DRwhFWInj6hLywFo+z4rg==, tableContent=null), ArticleFig(id=1322506403290395270, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=EN, label=Fig. 2, caption=
Flowchart of soil moisture inversion, figureFileSmall=BMGoDeQoZJ+i33NlXFIInw==, figureFileBig=/V6/3PzgzkMIedyWfg5/Sw==, tableContent=null), ArticleFig(id=1322506403374281351, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=CN, label=图2, caption=
土壤湿度反演流程, figureFileSmall=BMGoDeQoZJ+i33NlXFIInw==, figureFileBig=/V6/3PzgzkMIedyWfg5/Sw==, tableContent=null), ArticleFig(id=1322506403449778824, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=EN, label=Fig. 3, caption=
Global distribution of mean land surface effective reflectivity of GNOS-R specular points calibrated by FY-3E satellite from February 15 to November 30, 2023, figureFileSmall=MmQw7cXvxT7PWQhqXRI5Pg==, figureFileBig=KMwOKT7TSxFZB+/uR4j+lQ==, tableContent=null), ArticleFig(id=1322506403554636425, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=CN, label=图3, caption=
FY-3E卫星2023-02-15—11-30标定的GNOS-R镜面点平均地表有效反射率全球分布, figureFileSmall=MmQw7cXvxT7PWQhqXRI5Pg==, figureFileBig=KMwOKT7TSxFZB+/uR4j+lQ==, tableContent=null), ArticleFig(id=1322506403651105418, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=EN, label=Fig. 4, caption=
The probability density distribution of surface reflectance and the cumulative probability density distribution before and after fitting for three types of systems, figureFileSmall=KkGK7vZJyuVDpNPUwQ8EPQ==, figureFileBig=8RopZwZd47LOAJu1FDOubw==, tableContent=null), ArticleFig(id=1322506403726602891, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=CN, label=图4, caption=
3种系统的地表反射概率密度分布和拟合前后累积概率密度分布, figureFileSmall=KkGK7vZJyuVDpNPUwQ8EPQ==, figureFileBig=8RopZwZd47LOAJu1FDOubw==, tableContent=null), ArticleFig(id=1322506403806294668, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=EN, label=Fig. 5, caption=
Scatter plot of model-predicted surface soil moisture and SMAP reference soil moisture within the same grid, figureFileSmall=8EyKxtqWkxXtVoT21ORa0g==, figureFileBig=hiGSVUeBl2uWRevlBYC7vA==, tableContent=null), ArticleFig(id=1322506403890180749, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=CN, label=图5, caption=
相同网格内模型预测地表土壤湿度和SMAP参考土壤湿度散点图 图中bias、MAD、RMSE和ubRMSE单位均为cm3/cm3
, figureFileSmall=8EyKxtqWkxXtVoT21ORa0g==, figureFileBig=hiGSVUeBl2uWRevlBYC7vA==, tableContent=null), ArticleFig(id=1322506403990844046, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=EN, label=Fig. 6, caption=
Comparison of average soil moisture inverted from the combination of three systems with the global average soil moisture of SMAP, figureFileSmall=qWDNhdoh6BKCpd8BCVOhOQ==, figureFileBig=BXv91QI+5QtuXtBcmgRwvQ==, tableContent=null), ArticleFig(id=1322506404074730127, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=CN, label=图6, caption=
3系统数据组合反演的平均土壤湿度与SMAP全球平均土壤湿度对比, figureFileSmall=qWDNhdoh6BKCpd8BCVOhOQ==, figureFileBig=BXv91QI+5QtuXtBcmgRwvQ==, tableContent=null), ArticleFig(id=1322506404162810512, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=EN, label=Tab. 1, caption=
Comparison of evaluation indicators of inversion results for single systems
, figureFileSmall=null, figureFileBig=null, tableContent=
| 卫星系统 | bias/cm3·cm-3 | MAD/cm3·cm-3 | RMSE/cm3·cm-3 | ubRMSE/cm3·cm-3 | R |
| GPS | 0.001 | 0.032 | 0.068 | 0.068 | 0.830 |
| BDS | 0.000 | 0.032 | 0.066 | 0.066 | 0.836 |
| GAL | 0.001 | 0.030 | 0.069 | 0.069 | 0.806 |
), ArticleFig(id=1322506404259279505, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=CN, label=表1, caption=
单系统反演结果评价指标对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 卫星系统 | bias/cm3·cm-3 | MAD/cm3·cm-3 | RMSE/cm3·cm-3 | ubRMSE/cm3·cm-3 | R |
| GPS | 0.001 | 0.032 | 0.068 | 0.068 | 0.830 |
| BDS | 0.000 | 0.032 | 0.066 | 0.066 | 0.836 |
| GAL | 0.001 | 0.030 | 0.069 | 0.069 | 0.806 |
), ArticleFig(id=1322506404343165586, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=EN, label=Tab. 2, caption=
Comparison of evaluation indicators of inversion results for combined systems
, figureFileSmall=null, figureFileBig=null, tableContent=
| 卫星系统 | bias/cm3·cm-3 | MAD/cm3·cm-3 | RMSE/cm3·cm-3 | ubRMSE/cm3·cm-3 | R |
| GPS/BDS | 0.000 | 0.031 | 0.063 | 0.063 | 0.855 |
| GPS/GAL | 0.001 | 0.032 | 0.065 | 0.065 | 0.842 |
| BDS/GAL | 0.001 | 0.032 | 0.064 | 0.064 | 0.844 |
| GPS/BDS/GAL | 0.000 | 0.031 | 0.063 | 0.063 | 0.855 |
), ArticleFig(id=1322506404422857363, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322506396353016411, language=CN, label=表2, caption=
组合系统反演结果评价指标对比
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| 卫星系统 | bias/cm3·cm-3 | MAD/cm3·cm-3 | RMSE/cm3·cm-3 | ubRMSE/cm3·cm-3 | R |
| GPS/BDS | 0.000 | 0.031 | 0.063 | 0.063 | 0.855 |
| GPS/GAL | 0.001 | 0.032 | 0.065 | 0.065 | 0.842 |
| BDS/GAL | 0.001 | 0.032 | 0.064 | 0.064 | 0.844 |
| GPS/BDS/GAL | 0.000 | 0.031 | 0.063 | 0.063 | 0.855 |
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