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Application of the RPC model for spaceborne SAR image geometric processing

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Geo-Spatial information Science 2012年第1期15卷 3-9页

作者： li deren ZHANG Guo liU Xiaobo state key {2. of information engineering in surveying Mapping and Remote SensingWuhan University129 Luoyu RoadWuhan 430079China The Satellite of surveying and {2. Application Center of state bureau of surveying and {2. 28 Lotus Pond Road WestHaidian DistrictBeijing 100830China Research Institute 8358 of 3rd Institute of china Aerospace Science&Industry 58 Hangtian RoadNankai DistrictTianjin300192China

An increasing number of low,medium,and high resolution SAR satellites creates a demand for a generalized sensor model to replace the rigorous sensor model(RSM).The rational polynomial coefficient(RPC)model is a generic sensor model which accurately fits the object-image geometry for various sensor systems with different coefficient *** has been widely used as an alternative to RSM for photogrammetric processing of optical images,but its applications to SAR images are rarely discussed in *** this paper,the feasibility and practicability of the RPC model for SAR images are *** RPC model can not only be used to replace the RSM(range–Doppler model for SAR),but also applied to the processing chain for SAR data,thus facilitating the processing of SAR and InSAR data for end users.

关键词： RPC model spaceborne SAR orientation orthorectification

Geological context of the Chang’e-6 landing area and implications for sample analysis

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The Innovation 2024年第5期5卷 64-71,63页

作者： Zongyu Yue Sheng Gou Shujuan Sun Wei Yang Yi Chen Yexin Wang Honglei lin Kaichang Di Yangting lin Xianhua li Fuyuan Wu key laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China state key {2. of remote sensing Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100101China School of Architecture and Civil engineering Chengdu UniversityChengdu 610106China state key {2. of lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Center for Excellence in Comparative Planetology Chinese Academy of SciencesHefei 230026China

Research on returned samples can provide ground truth for the study of the geological evolution history of the ***,previous missions all collected samples from the near side of the Moon,which is significantly different from the far side of the Moon in terms of the thickness of the lunar crust,magma activity,and ***,the samples from the far side of the Moon are of great significance for a comprehensive understanding of the history of the ***’s Chang’e-6(CE-6)probe has successfully landed on the lunar far side and will return samples in the coming *** the precise location of the CE-6 landing site,a detailed analysis of the geological background is conducted in this *** landing site of CE-6 is within the Apollo crater,which is inside the largest impact basin on the Moon,i.e.,the South Pole-Aitken(SPA)*** to the numerical simulation of the formation process of the SPA basin,CE-6 landed at the edge of the SPA impact melting zone,which is presumably composed of impact melt of the lunar *** Apollo crater subsequently excavated deep material again,which constitutes the basement of the CE-6 landing ***,erupted basalt covered these basement rocks,and they also constitute the main source of the CE-6 *** on the dating method of crater size-frequency distribution,we find that the basalt is2.50 *** CE-6 samples also possibly contain basement rocks as excavated and ejected by craters,and they can provide crucial information for our understanding of lunar geological history along with the basalt samples.

关键词： basalt basement constitute

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论智能遥感卫星的“快、准、灵”应用服务

先进小卫星技术（中英文）

先进小卫星技术（中英文） 2024年第1期1卷 1-9页

作者：李德仁王密仵倩玉武汉大学测绘遥感信息工程国家重点实验室武汉430079

过去几十年里,中国遥感卫星实现了从有到好的技术跨越,当前中国遥感卫星数量已达300余颗.然而,遥感卫星与通信和导航卫星相比还存在明显不足.遥感卫星走向智能化和大众化,必须解决“快、准、灵”的技术问题.结合现有研究成果,论述了实... 详细信息

过去几十年里,中国遥感卫星实现了从有到好的技术跨越,当前中国遥感卫星数量已达300余颗.然而,遥感卫星与通信和导航卫星相比还存在明显不足.遥感卫星走向智能化和大众化,必须解决“快、准、灵”的技术问题.结合现有研究成果,论述了实现智能遥感卫星“快、准、灵”实时智能服务的关键技术.通过无地面控制高精度定位、在轨智能处理和星群组网协同观测技术,快速生成用户所需产品;通过成像模型构建、高精度姿态测量和在轨自主几何定标技术,为用户提供精准的定位信息;通过遥感卫星软件定义、时空谱综合优化和通导遥一体化集成技术,提高单星服务能力,实现从卫星端到用户终端(business-to-Consumer,b2.)的实时智能大众服务.

关键词：智能遥感快准灵应用服务协同观测

Carbon dioxide(CO_(2.)emissions from the service industry,traffic,and secondary industry as revealed by the remotely sensed nighttime light data

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International Journal of Digital Earth 2021年第11期14卷 1514-1527页

作者： Kaifang Shi Jingwei Shen Yizhen Wu Shirao liu linyi li School of Geographical Sciences Southwest UniversityChongqingPeople’s Republic of China Chongqing Jinfo Mountain Karst Ecosystem National Observation and Research Station Southwest UniversityChongqingPeople’s Republic of China Chongqing engineering Research Center for remote {2. big Data Application School of Geographical SciencesSouthwest UniversityChongqingPeople’s Republic of China School of remote sensing and {2. engineering Wuhan UniversityWuhanPeople’s Republic of China

Exploring carbon dioxide(CO2.emissions from human activities is essential for urban energy conservation and resource *** sensed nighttime lights from the Suomi NPP-VIIRS provide spatial consistency in and a low-cost way of revealing CO2.*** many researches have documented the feasibility of the Suomi NPP-VIIRS data for assessing CO2.emissions,few have systematically revealed the ability of nighttime lights for evaluating CO2.emissions from different industries,such as service industry CO2.emissions(SC),traffic CO2.emissions(TC),and secondary industry CO2.emissions(IC).Here,china was selected as the experimental subject,and we comprehensively explored the relationships between the nighttime lights and SC,TC,and IC,and investigated the factors mediating these *** found that without considering other factors,the nighttime lights only revealed up to 51.2.of TC,followed by 41.7%of IC and 2..7%of *** controlling for city characteristic variables,the models showed that there were positive correlations between the Suomi NPP-VIIRS data and SC,IC,and TC,and that nighttime lights have an Inverted-U relationship with *** Suomi NPP-VIIRS data are more suitable for revealing SC,TC,and IC in medium-sized and large-sized cities than in small-sized cities and megacities.

关键词： Nighttime light data Suomi NPP-VIIRS CO2.emissions transmission mechanism china

Spatial and temporal variabilities of rainstorms over china under climate change

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Journal of Geographical Sciences 2021年第4期31卷 479-496页

作者： HUANG Chang ZHANG Shiqiang DONG linyao WANG Zucheng li {2. CUI Luming Shaanxi key laboratory of Earth Surface System and Environmental Carrying Capacity Northwest UniversityXi'an 710127China Institute of Earth Surface System and Hazards Northwest UniversityXi'an 710127China College of Urban and Environmental Sciences Northwest UniversityXi'an 710127China Changjiang River Scientific Research Institute Wuhan 430010China state Environmental Protection key {2. of Wetland Ecology and Vegetation Restoration Institute for Peat&Mire ResearchNortheast Normal UniversityChangchun 130021China School of remote sensing and {2. engineering Wuhan UniversityWuhan 430070China

Rainstorms are one of the extreme rainfall events that cause serious disasters,such as urban flooding and mountain *** studies have used rain gauge observations to analyze rainstorm events,but relevant information is usually missing in gauge-sparse ***-derived precipitation datasets serve as excellent supplements or substitutes for the gauge *** developing a grid-based rainstorm-identification tool,we used the Tropical Rainfall Measurement Mission(TRMM)Multi-satellite Precipitation Analysis(TMPA)time series product to reveal the spatial and temporal variabilities of rainstorms over china during 1998–*** patterns of both increasing and decreasing rainstorm occurrences were detected,with no spatially uniform trend being observed across the whole *** was an increase in the area being affected by rainstorms during the 2.-year period,with rainstorm centers shifting along the southwest–northeast *** occurrence was found to be correlated with local total *** comparing rainstorm occurrence with climate variables such as the El Ni?o-Southern Oscillation and Pacific Decadal Oscillation,we also found that climate change was likely to be the primary reason for rainstorm occurrence in *** study complements previous studies that used gauge observations by providing a better understanding of the spatiotemporal dynamics of china’s rainstorms.

关键词： climate change extreme precipitation meteorology rainfall satellite precipitation data

基于ROTI和AATR的测地型GNSS接收机监测北半球高纬度区域电离层闪烁准确性分析

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测绘学报 2024年第7期53卷 1251-1264页

作者：赵东升张雪礼崔双雷王潜心李冠青李龙江李宸栋张克非中国矿业大学环境与测绘学院江苏徐州221116 国家空间科学数据中心北京101407 浙江师范大学浙江金华321004

当前,第2.个太阳周期已进入强活跃时期,能引发大量电离层不规则体,进而对使得穿行其中的GNSS信号产生电离层闪烁。这已成为影响GNSS全球稳定导航定位服务的重要干扰源。对全球电离层闪烁进行广泛且全面的监测是消除闪烁对GNSS干扰的重... 详细信息

当前,第2.个太阳周期已进入强活跃时期,能引发大量电离层不规则体,进而对使得穿行其中的GNSS信号产生电离层闪烁。这已成为影响GNSS全球稳定导航定位服务的重要干扰源。对全球电离层闪烁进行广泛且全面的监测是消除闪烁对GNSS干扰的重要前提,然而传统电离层闪烁监测接收机(ISMR)分布有限,无法满足闪烁全球监测需求;测地型接收机分布广泛,但从其低采样数据中提取的闪烁因子缺乏新太阳周期长时序监测数据验证,导致其闪烁监测可靠性存疑。为此,本文基于近3 a新太阳周期测地型接收机数据,以ISMR提供的闪烁因子为参考,从代表性空间天气事件闪烁响应、日闪烁发生率、闪烁持续时间概率分布、闪烁日发生规律及其随极昼、极夜、地磁指数的特征变化等方面,对比研究了两种测地型接收机电离层闪烁因子(即电离层总电子含量变化率指数ROTI和沿弧段电子含量变化率指数AATR)监测北极高纬度区域电离层闪烁的准确性,并给出了ROTI和AATR在高纬度区域判断闪烁发生的经验阈值。结果表明,ROTI和AATR均能较为准确探测到地磁扰动、太阳活动等因素驱动的区域电离层闪烁,并能有效表征电离层闪烁统计学上的日变化规律,但两种闪烁因子不能准确区分闪烁和电离层电子密度梯度变化,导致在电子密度梯度变化剧烈期间存在较高虚警。该研究成果可为准确选择区域电离层闪烁监测因子提供指导。

关键词： GNSS 电离层闪烁相位闪烁因子测地型接收机

A Novel Inversion Approach for the Kernel-Driven bRDF Model for Heterogeneous Pixels

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Journal of Remote Sensing

Journal of remote sensing 2023年第1期3卷 160-177页

作者： Hanliang li Kai Yan Si Gao Xuanlong Ma Yelu Zeng Wenjuan li Gaofei Yin Xihan Mu Guangjian Yan Ranga b.Myneni state key {2. of remote sensing Science Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China School of Land Science and Technology China University of GeosciencesBeijing 100083China College of Earth and Environmental Sciences Lanzhou UniversityLanzhou 730020China College of Land Science and Technology China Agricultural UniversityBeijing 100083China state key {2. of Efficient Utilization of Arid and Semi-arid Arable Land in Northern china the Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China INRAE Avignon UniversitéUMR EMMAHAvignon F-84000France Faculty of Geosciences and Environmental engineering Southwest Jiaotong UniversityChengdu 610031China Department of Earth and Environment Boston UniversityBostonMA 02215USA

The bidirectional reflectance distribution function(bRDF)of the land surface contains information relating to its physical structure and *** bRDF modeling for heterogeneous pixels is important for global ecosystem monitoring and radiation balance ***,the original kerneldriven models,which many operational bRDF/Albedo algorithms have adopted,do not explicitly consider the heterogeneity within heterogeneous pixels,which may result in large fitting *** this paper,we attempted to improve the fitting ability of the kernel-driven models over heterogeneous pixels by changing the inversion approach and proposed a dynamic weighted least squares(DWLS)inversion *** performance of DWLS and the traditional ordinary least squares(OLS)inversion approach were compared using simulated *** also evaluated its ability to reconstruct multiangle satellite observations and provide accurate bRDF using unmanned aerial vehicle *** results show that the developed DWLS approach improves the accuracy of modeled bRDF of heterogeneous *** DWLS approach applied to satellite observations shows better performance than the OLS method in study regions and exhibits smaller mean fitting residuals both in the red and near-infrared *** DWLS approach also shows higher bRDF modeling accuracy than the OLS approach with unmanned aerial vehicle *** results indicate that the DWLS inversion approach can be a better choice when kernel-driven models are used for heterogeneous pixels.

关键词： bRDF kernel Inversion

滑坡灾害InSAR早期识别关键技术方法研究

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工程地质学报 2024年第3期32卷 963-977页

作者：宋家苇杨莹辉许强王寿宇李鹏飞袁泉黎浩良陈强地质灾害防治与地质环境保护国家重点实验室(成都理工大学) 成都610059 水电水利规划设计总院北京100120 中国电建集团贵阳勘测设计研究院有限公司贵阳550081 四川省公路规划勘察设计研究院有限公司成都610041 西南交通大学遥感与信息工程系成都610031

本研究重点关注了合成孔径雷达干涉测量(InSAR)技术在滑坡识别方面的应用,并着重分析了InSAR技术进行滑坡识别时所遇到的典型技术难题。首先,论文分析了InSAR多视处理作为预处理关键步骤的重要性,探讨了多视因子选择在噪声抑制和空间分... 详细信息

本研究重点关注了合成孔径雷达干涉测量(InSAR)技术在滑坡识别方面的应用,并着重分析了InSAR技术进行滑坡识别时所遇到的典型技术难题。首先,论文分析了InSAR多视处理作为预处理关键步骤的重要性,探讨了多视因子选择在噪声抑制和空间分辨率之间的平衡问题,并获得了最佳的多视因子参数。其次,本文讨论了干涉图滤波窗口对形变提取精度的影响,发现最佳的滤波窗口可有效保留形变信息,并抑制InSAR干涉噪声,有利于滑坡隐患的准确识别。此外,本研究还发现采用InSAR干涉图层面的大气校正处理,可避免InSAR相位解缠误差的传播,并有效削弱大气噪声,提高InSAR形变提取精度。最后,本研究讨论了InSAR干涉对筛选中的长短时间基线问题,发现仅利用短时间基线干涉对较难捕捉滑坡小量级形变,而长时间基线又不可避免面临干涉失相关的挑战,因此,以短时间基线干涉对为基础,辅以一定数量的高质量长时间基线干涉对,是更为可靠的小量级运动滑坡隐患InSAR识别干涉对筛选策略。最后,研究以金沙江上游某滑坡密集区域为例,基于最优参数和对照参数组开展了实验,验证了最优参数组的有效性和适用性。上述研究成果显著深化了InSAR技术在地质灾害识别应用中的适用性和局限性,为利用InSAR技术开展滑坡灾害早期识别提供了科学的支撑,具有重要的理论和实用价值。

关键词：滑坡灾害 InSAR早期识别多视因子滤波窗口长短时间基线大气校正

木格措南断裂异常运动信号InSAR探测与成因机制研究

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灾害学 2024年第4期39卷 15-23页

作者：李小云杨莹辉许强宋家苇李鹏飞王运生陈强成都理工大学地质灾害防治与地质环境保护国家重点实验室四川成都610059 中国电建集团贵阳勘察设计研究院有限公司贵州贵阳550081 西南交通大学遥感与信息工程系四川成都610031

该文获取Sentinel-1卫星升降轨合成孔径雷达影像,采用SbAS-InSAR技术提取木格措南断裂区域地表形变速率场,结果显示木格措南断裂北段和中段局部区域存在明显的断裂相关构造运动信号,而断裂南段未发现明显的断裂活动信号。针对北段和中... 详细信息

该文获取Sentinel-1卫星升降轨合成孔径雷达影像,采用SbAS-InSAR技术提取木格措南断裂区域地表形变速率场,结果显示木格措南断裂北段和中段局部区域存在明显的断裂相关构造运动信号,而断裂南段未发现明显的断裂活动信号。针对北段和中段的局部断裂构造形变,提取其时序形变并与局部的降水和气温开展关联分析,同时联合升降轨数据开展了垂向形变和平行断层方向的形变分解,并选取典型剖面和时序点开展联合分析,发现断裂北段和中段的显著形变,受气温降水的周性变化和青藏高原冰川均衡调整过程影响显著,研究表明木格措南断裂区域发现的地表形变,是气温降水和冰川均衡调整过程造成的周期性形变与断裂构造形变的叠加。

关键词：木格措南断裂 InSAR监测周期性形变冰川均衡调整构造形变

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