The Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)satellite is a small magnetosphere–ionosphere link explorer developed cooperatively between China and Europe.It pioneers the use of X-ray imaging technology...The Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)satellite is a small magnetosphere–ionosphere link explorer developed cooperatively between China and Europe.It pioneers the use of X-ray imaging technology to perform large-scale imaging of the Earth’s magnetosheath and polar cusp regions.It uses a high-precision ultraviolet imager to image the overall configuration of the aurora and monitor changes in the source of solar wind in real time,using in situ detection instruments to improve human understanding of the relationship between solar activity and changes in the Earth’s magnetic field.The SMILE satellite is scheduled to launch in 2025.The European Incoherent Scatter Sciences Association(EISCAT)-3D radar is a new generation of European incoherent scatter radar constructed by EISCAT and is the most advanced ground-based ionospheric experimental device in the high-latitude polar region.It has multibeam and multidirectional quasi-real-time three-dimensional(3D)imaging capabilities,continuous monitoring and operation capabilities,and multiple-baseline interferometry capabilities.Joint detection by the SMILE satellite and the EISCAT-3D radar is of great significance for revealing the coupling process of the solar wind–magnetosphere–ionosphere.Therefore,we performed an analysis of the joint detection capability of the SMILE satellite and EISCAT-3D,analyzed the period during which the two can perform joint detection,and defined the key scientific problems that can be solved by joint detection.In addition,we developed Web-based software to search for and visualize the joint detection period of the SMILE satellite and EISCAT-3D radar,which lays the foundation for subsequent joint detection experiments and scientific research.展开更多
针对资源三号(ZY-3)卫星三线阵传感器特点,利用卫星影像附带的有理函数模型参数(RPC)进行目标定位,检测RPC系统误差,分析4种像面补偿模型的优劣性;详细推导了基于有理函数模型(rational function model,RFM)的ZY-3卫星影像区域网平差模...针对资源三号(ZY-3)卫星三线阵传感器特点,利用卫星影像附带的有理函数模型参数(RPC)进行目标定位,检测RPC系统误差,分析4种像面补偿模型的优劣性;详细推导了基于有理函数模型(rational function model,RFM)的ZY-3卫星影像区域网平差模型。以莱州地区ZY-3卫星三线阵影像为例,通过与直接空间前方交会的定位结果相比较,认为该文提出的区域网平差方法在消除ZY-3影像RPC系统误差的同时,大幅度提高了影像的定位精度。展开更多
高分辨率遥感影像的几何校正是其后续影像处理的基础,对提升影像预处理的几何精度具有十分重要的应用价值.本文通过优化有理函数模型(rational function model,RFM),分别对资源三号(ZY-3)和Pléiades卫星高分辨率遥感影像进行几何校...高分辨率遥感影像的几何校正是其后续影像处理的基础,对提升影像预处理的几何精度具有十分重要的应用价值.本文通过优化有理函数模型(rational function model,RFM),分别对资源三号(ZY-3)和Pléiades卫星高分辨率遥感影像进行几何校正,比较了不同数量地面控制点情境下几何精度提升的效果,并对二者的校正结果进行对比.研究结果表明:(1)未加入控制点时,ZY-3和Pléiades卫星影像平面误差>7.20 m;(2)当添加1个控制点对RFM进行优化后,2种卫星的高分辨率影像平面误差可降低至4 m左右;(3)随着控制点数目的增加,2种卫星影像的平面误差降低幅度变小,但整体偏移方位改变不大.通过优化RFM的几何校正方法可以不同程度地提升高分辨率影像的平面几何精度,提升效果明显,可满足遥感监测、测图等应用需求.展开更多
ZiYuan3-03(ZY3-03)satellite was launched on July 25,2020,equipped with China’s second-generation laser altimeter for earth observation.In order to preliminarily evaluate the in-orbit performance of the ZY3-03 laser a...ZiYuan3-03(ZY3-03)satellite was launched on July 25,2020,equipped with China’s second-generation laser altimeter for earth observation.In order to preliminarily evaluate the in-orbit performance of the ZY3-03 laser altimeter,the pointing bias calibration based on terrain matching method was adopted.Three tracks of laser data were employed for the ZY3-03 laser altimeter calibration test.Three groups of pointing parameters were obtained respectively,and the mean value of pointing is considered as the optimal calibration result.After calibration,ZY3-03 laser pointing accuracy is greatly improved by the method,and its pointing accuracy is approximately 12.7 arcsec.The first-track laser data on the Black Sea surface is used to evaluate the relative elevation accuracy of ZY3-03 laser altimeter after pointing bias calibration,which is improved from 0.33 m to 0.19 m after calibration.Meanwhile,the absolute elevation accuracy of ZY3-03 laser altimeter after pointing bias calibration is evaluated by the Ground Control Points(GCPs)measured by RTK(Real-Time Kinematic),which is better than 0.5 m in the flat terrain.展开更多
基金supported by the Stable-Support Scientific Project of the China Research Institute of Radio-wave Propagation(Grant No.A13XXXXWXX)the National Natural Science Foundation of China(Grant Nos.42174210,4207202,and 42188101)the Strategic Pioneer Program on Space Science,Chinese Academy of Sciences(Grant No.XDA15014800)。
文摘The Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)satellite is a small magnetosphere–ionosphere link explorer developed cooperatively between China and Europe.It pioneers the use of X-ray imaging technology to perform large-scale imaging of the Earth’s magnetosheath and polar cusp regions.It uses a high-precision ultraviolet imager to image the overall configuration of the aurora and monitor changes in the source of solar wind in real time,using in situ detection instruments to improve human understanding of the relationship between solar activity and changes in the Earth’s magnetic field.The SMILE satellite is scheduled to launch in 2025.The European Incoherent Scatter Sciences Association(EISCAT)-3D radar is a new generation of European incoherent scatter radar constructed by EISCAT and is the most advanced ground-based ionospheric experimental device in the high-latitude polar region.It has multibeam and multidirectional quasi-real-time three-dimensional(3D)imaging capabilities,continuous monitoring and operation capabilities,and multiple-baseline interferometry capabilities.Joint detection by the SMILE satellite and the EISCAT-3D radar is of great significance for revealing the coupling process of the solar wind–magnetosphere–ionosphere.Therefore,we performed an analysis of the joint detection capability of the SMILE satellite and EISCAT-3D,analyzed the period during which the two can perform joint detection,and defined the key scientific problems that can be solved by joint detection.In addition,we developed Web-based software to search for and visualize the joint detection period of the SMILE satellite and EISCAT-3D radar,which lays the foundation for subsequent joint detection experiments and scientific research.
文摘针对资源三号(ZY-3)卫星三线阵传感器特点,利用卫星影像附带的有理函数模型参数(RPC)进行目标定位,检测RPC系统误差,分析4种像面补偿模型的优劣性;详细推导了基于有理函数模型(rational function model,RFM)的ZY-3卫星影像区域网平差模型。以莱州地区ZY-3卫星三线阵影像为例,通过与直接空间前方交会的定位结果相比较,认为该文提出的区域网平差方法在消除ZY-3影像RPC系统误差的同时,大幅度提高了影像的定位精度。
文摘高分辨率遥感影像的几何校正是其后续影像处理的基础,对提升影像预处理的几何精度具有十分重要的应用价值.本文通过优化有理函数模型(rational function model,RFM),分别对资源三号(ZY-3)和Pléiades卫星高分辨率遥感影像进行几何校正,比较了不同数量地面控制点情境下几何精度提升的效果,并对二者的校正结果进行对比.研究结果表明:(1)未加入控制点时,ZY-3和Pléiades卫星影像平面误差>7.20 m;(2)当添加1个控制点对RFM进行优化后,2种卫星的高分辨率影像平面误差可降低至4 m左右;(3)随着控制点数目的增加,2种卫星影像的平面误差降低幅度变小,但整体偏移方位改变不大.通过优化RFM的几何校正方法可以不同程度地提升高分辨率影像的平面几何精度,提升效果明显,可满足遥感监测、测图等应用需求.
基金Research and Development of Forest Resources Dynamic Monitoring and Forest Volume Estimation with LiDAR Data(No.2020YFE0200800)High Resolution Remote Sensing,Surveying and Mapping Application Program(No.42-Y30B04-9001-19/21)+4 种基金Active and Passive Composite Mapping and Application Technology with Visible,Infrared and Laser Sensors(No.D040106)Multi-beam Terrain Detection Laser and Its Application Technology(No.D040105)National Natural Science Foundation of China(Nos.41571440,41771360,41971426)Class B Project of Beijing Science and Technology Association Jinqiao Project Seed Fund(No.ZZ19013)Innovative Youth Talents Program,MNR(No.12110600000018003930)。
文摘ZiYuan3-03(ZY3-03)satellite was launched on July 25,2020,equipped with China’s second-generation laser altimeter for earth observation.In order to preliminarily evaluate the in-orbit performance of the ZY3-03 laser altimeter,the pointing bias calibration based on terrain matching method was adopted.Three tracks of laser data were employed for the ZY3-03 laser altimeter calibration test.Three groups of pointing parameters were obtained respectively,and the mean value of pointing is considered as the optimal calibration result.After calibration,ZY3-03 laser pointing accuracy is greatly improved by the method,and its pointing accuracy is approximately 12.7 arcsec.The first-track laser data on the Black Sea surface is used to evaluate the relative elevation accuracy of ZY3-03 laser altimeter after pointing bias calibration,which is improved from 0.33 m to 0.19 m after calibration.Meanwhile,the absolute elevation accuracy of ZY3-03 laser altimeter after pointing bias calibration is evaluated by the Ground Control Points(GCPs)measured by RTK(Real-Time Kinematic),which is better than 0.5 m in the flat terrain.
