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Analysis of the joint detection capability of the SMILE satellite and EISCAT-3D radar

Earth and Planetary Physics 2024年第1期8卷 299-306页

作者： JiaoJiao Zhang TianRan Sun XiZheng Yu DaLin Li Hang Li JiaQi Guo ZongHua Ding Tao Chen Jian Wu Chi Wang State Key Laboratory of space weather National Space Science CenterChinese Academy of SciencesBeijing 100190China Key Laboratory of Solar Activity and space weather National Space Science CenterChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 101408China Key Laboratory of Electronics and Information Technology for space Systems Chinese Academy of SciencesBeijing 100190China China Research Institute of Radio-wave Propagation Qingdao 266075China

The Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)satellite is a small magnetosphere–ionosphere link explorer developed cooperatively between China and *** pioneers the use of X-ray imaging technology to perform large-scale imaging of the Earth’s magnetosheath and polar cusp *** 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 *** SMILE satellite is scheduled to launch in *** 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 *** has multibeam and multidirectional quasi-real-time three-dimensional(3D)imaging capabilities,continuous monitoring and operation capabilities,and multiple-baseline interferometry *** detection by the SMILE satellite and the EISCAT-3D radar is of great significance for revealing the coupling process of the solar wind–magnetosphere–***,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 *** 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.

关键词： Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)satellite European Incoherent Scatter Sciences Association(EISCAT)-3D radar joint detection

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Assessment of International GNSS Service Global Ionosphere Map products over China region based on measurements from the Crustal Movement Observation Network of China

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Earth and Planetary Physics 2024年第2期8卷 400-407页

作者： Jin Hu HaiBing Ruan FuQing Huang ShengYang Gu XianKang Dou Institute of space weather Nanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of space weather Chinese Academy of Sciences(CAS)Beijing 100190China School of Electronic Information Wuhan UniversityWuhan 430072China Wuxi Research Institute Nanjing University of Information Science and TechnologyWuxi Jiangsu 214000China CAS Key Laboratory of Geospace Environment School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China

The global ionosphere maps(GIM)provided by the International GNSS Service(IGS)are extensively utilized for ionospheric morphology monitoring,scientific research,and practical *** the credibility of GIM products in data-sparse regions is of paramount *** this study,measurements from the Crustal Movement Observation Network of China(CMONOC)are leveraged to evaluate the suitability of IGS-GIM products over China region in *** indices of mean error(ME),root mean square error(RMSE),and normalized RMSE(NRMSE)are then utilized to quantify the accuracy of IGS-GIM *** revealed distinct local time and latitudinal dependencies in IGS-GIM errors,with substantially high errors at nighttime(NRMSE:39%)and above 40°latitude(NRMSE:49%).Seasonal differences also emerged,with larger equinoctial deviations(NRMSE:33.5%)compared with summer(20%).A preliminary analysis implied that the irregular assimilation of sparse IGS observations,compounded by China’s distinct geomagnetic topology,may manifest as error *** results suggest that modeling based solely on IGS-GIM observations engenders inadequate representations across China and that a thorough examination would proffer the necessary foundation for advancing regional total electron content(TEC)constructions.

关键词： International GNSS Service(IGS)Global Ionosphere Maps(GIM) Crustal Movement Observation Network of China(CMONOC) total electron content(TEC) data assessment

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Progress and Achievements of Fengyun Meteorological Satellite Program since 2022

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空间科学学报 2024年第4期44卷 712-721页

作者： GUAN Min WANG Jingsong ZHAO Xiangang QIN Danyu FAN Cunqun XIAN Di LIU Chang National Satellite Meteorological Center(National Centre for space weather) Beijing 100081 Innovation Center for Fengyun Meteorological Satellite(FYSIC) Beijing 100081 Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites/Key Laboratory of space weather China Meteorological AdministrationBeijing 100081

Fengyun meteorological satellites have undergone a series of significant developments over the past 50 *** generations,four types,and 21 Fengyun satellites have been developed and launched,with 9 currently operational in *** data obtained from Fengyun satellites is employed in a multitude of applications,including weather forecasting,meteorological disaster prevention and reduction,climate change,global environmental monitoring,and space *** data products and services are made available to the global community,resulting in tangible social and economic *** 2023,two Fengyun meteorological satellites were successfully *** report presents an overview of the two recently launched Fengyun satellites and currently in orbit Fengyun satellites,including an evaluation of their remote sensing instruments since ***,it addresses the subject of Fengyun satellite data archiving,data services,application services,international cooperation,and supporting ***,the development prospects have been outlined.

关键词： Fengyun meteorological satellites Data services and application International cooperation and support

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Design and application of an autonomous Master Control System for a multi-layer magnetic and helioseismic telescope

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Astronomical Techniques and Instruments 2024年第3期1卷 187-196页

作者： Liyue Tong Yingzi Sun Xiao Yang Jiaben Lin Yuanyong Deng Xianyong Bai Bingxiang Wang Xiaoming Zhu Yang Bai Yi Shang Hui Wang National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Key Laboratory of Solar Activity and space weather National Space Science CenterChinese Academy of SciencesBeijing 100190China School of Astronomy and space Science University of Chinese Academy of SciencesBeijing 100049China School of Electrical and Electronic Engineering Wuhan Polytechnic UniversityWuhan 430023China

With the growing significance of space weather forecasting,multi-layer magnetic and helioseismic telescopes are emerging as a key area of ***,owing to the diverse operational processes and sophisticated hardware configurations of these devices,there is an urgent need for efficient autonomous observation *** autonomous Master Control System(MCS)can ensure efficient performance,data consistency,and stability,and the prototype presented here adopts a microservices architecture,breaking down the hardware into multiple subsystems and converting their functions into individual services.A central decision-making system leads the operations,supported by three auxiliary systems and three device control *** inter-subsystem service calls,it achieves rapid imaging and spectroscopic *** verify system stability and observation efficiency,the system was tested on the Solar Full-disk Multi-layer *** results verify this system can operate automatically for 4 consecutive months,acquire photospheric vector magnetic and Doppler velocity fields within a 15-minute interval,and measure chromospheric longitudinal magnetic and Doppler velocity fields in under 180 *** ensures consistent and stable solar monitoring and serves as a practical methodological benchmark for the development of similar devices.

关键词： Astronomical instrumentation Telescopes Solar optical telescopes Automated telescopes

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Construction and Research Progress of the Chinese Meridian Project in 2022–2023

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空间科学学报 2024年第4期44卷 704-711页

作者： WANG Chi CHEN Zhiqing XU Jiyao National space Science Center Chinese Academy of SciencesBeijing 100190

The Chinese Meridian Project(CMP)is a major national science and technology infrastructure constructed in two *** first phase of the CMP has been operating for more than a solar *** 2022 to 2023,utilizing the monitoring data collected by the CMP,scientists made major breakthroughs in fields of ionosphere,middle and upper atmosphere,and coupling between *** construction of the second phase of the CMP is nearly finished,and the project is expected to operate as a whole in 2025 after national acceptance of the second *** whole project was built in an architecture of so-called“One Chain,Three Networks and Four Focuses”.It is promising to make a three-dimensional observation of the whole solar-terrestrial *** science community is looking forward to the great contribution of the CMP to space weather and space physics research.

关键词： Chinese Meridian Project(CMP) Magnetosphere Ionosphere Middle and upper atmosphere

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Remote sensing and its applications using GNSS reflected signals:advances and prospects

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Satellite Navigation 2024年第1期5卷 10-51页

作者： Shuanggen Jin Adriano Camps Yan Jia Feng Wang Manuel Martin-Neira Feixiong Huang Qingyun Yan Shuangcheng Zhang Zhongyu Li Komi Edokossi Dongkai Yang Zhiyu Xiao Zhongmin Ma Weihua Bai Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai200030China School of Surveying and Land Information Engineering Henan Polytechnic UniversityJiaozuo454003China Department of Signal Theory and Communications Technical University of CataloniaBarcelona08034Spain Department of Surveying and Geoinformatics Nanjing University of Posts and TelecommunicationsNanjing210023China School of Electronics and Information Engineering Beihang UniversityBeijing100191China European space Research and Technology Centre(ESTEC) European Space Agency2200-AGNoordwijkThe Netherlands National space Science Center Chinese Academy of SciencesBeijing100190China School of Remote Sensing and Geomatics Engineering Nanjing University of Information Science and TechnologyNanjing210044China College of Geological Engineering and Geomatics Chang’an UniversityXi’an710054China University of Electronic Science and Technology of China Chengdu611731China

The Global Navigation Satellite Systems(GNSS),including the US’s GPS,China’s BDS,the European Union’s Galileo,and Russia’s GLONASS,offer real-time,all-weather,any-time,anywhere and high precision observations by transmitting L band signals continuously,which have been widely used for positioning,navigation and *** the development of GNSS technology,it has been found that GNSS-reflected signals can be used to detect Earth’s surface characteristics together with other signals of *** this paper,the current status and latest advances are presented on Global Navigation Satellite System-Reflectometry(GNSS-R)in theory,methods,techniques and *** developments and progresses in GNSS-R instruments,theoretical modeling,and signal processing,ground and space-/air-borne experiments,parameters retrieval(*** speed,sea surface height,soil moisture,ice thickness),sea surface altimetry and applications in the atmosphere,oceans,land,vegetation,and cryosphere are given and reviewed in ***,the challenges in the GNSS-R development of each field are also ***,the future applications and prospects of GNSS-R are discussed,including multi-GNSS reflectometry,new GNSS-R receivers,GNSS-R missions,and emerging applications,such as mesoscale ocean eddies,ocean phytoplankton blooms,microplastics detection,target recognition,river flow,desert studies,natural hazards and landslides monitoring.

关键词： GNSS Reflectometry Remote sensing Environmental change

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Research Advances of the Chinese Meridian Project in 2020-2021

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空间科学学报 2022年第4期42卷 574-583页

作者： WANG Chi WANG Jiangyan XU Jiyao State Key Laboratory of space weather National Space Science CenterChinese Academy of SciencesBeijing 100190

The Chinese Meridian Project(CMP)is a major national science and technology infrastructure invested and constructed by the Chinese *** project builds space environment observation stations,focusing on the monitoring of the space environment over China,so as to provide a monitoring basis for clarifying the regional characteristics of the space environment over China and its relationship with global change,and making important innovative scientific *** first phase of the CMP passed the national acceptance in *** has been running for nearly ten years and has accumulated more than 8 TB monitoring *** data are all available to all data users through the data center of the *** 2020 to 2021,users of CMP data have completed a series of original works,which have solved current scientific problems in the field of space physics *** the other hand,they also make us look forward to the completion of the second phase of CMP and its application benefits in national major strategic needs and cutting-edge scientific research.

关键词： Chinese Meridian Project(CMP) space physics Magnetosphere Ionosphere Middle and upper atmosphere

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Progress of Fengyun Meteorological Satellites Since 2020

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空间科学学报 2022年第4期42卷 724-732页

作者： ZHANG Peng XU Zhe GUAN Min XIE Lizi XIAN Di LIU Chang Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites Beijing 100081 National Satellite Meteorological Center(National Center for space weather) Beijing 100081

China’s efforts to develop Fengyun meteorological satellites have made major strides over the past 50 years,with the polar and geostationary meteorological satellite series achieving continuously stable operation to persistently provide data and product services *** the end of 2021,19 Chinese self-developed Fengyun meteorological satellites have been launched *** of them are in operation at present,the data and products are widely applied to weather analysis,numerical weather forecasting and climate prediction,as well as environment and disaster *** the last COSPAR report,FY-4B,the first new-generation operational geostationary satellite,and FY-3E,the first early-morning orbit satellite in China’s polar-orbiting meteorological satellite family have been launched in *** characteristics of the two latest satellites and the instruments onboard are addressed in this *** status of current Fengyun Satellites,product and data service and international cooperation and supporting activities has been introduced as well.

关键词： Fengyun meteorological satellite Early morning orbit Product and data service International co-operation and supporting

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Anomalous Ionospheric foF2 Variations Observed Prior to the Dalbandin Earthquake in Pakistan

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Earthquake Research in China 2015年第4期29卷 567-575页

作者： Muhammad Irfan Aftab Alam Muhammad Junaid Muhammad Ayyaz Ameen Talat Iqbal Huang Fuqiong Center for Earthquake Studies National Center for Physics space weather monitoring division SUPARCO China Earthquake Networks Center

Ionosphereic foF2 variations are very sensitive to the seismic effect and results of ionospheric perturbations associated with earthquakes seem to very hopeful for short-term earthquake prediction. On January 18,2011 at 20: 23 UT a great earthquake( M = 7. 2)occurred in Dalbandin( 28. 73° N,63. 92° E),Pakistan. In this study,we have tried to find out the features of pre-earthquake ionospheric anomalies by using the hourly day time( 08. 00 a. m.- 05. 00 p. m.) data of critical frequency( foF2) obtained by three vertical sounding stations installed in Islamabad( 33. 78°N,73. 06°E),Multan( 32. 26°N,71. 51°E) and Karachi( 24. 89° N,67. 02° E), Pakistan. The results show the significant anomalies of foF2 in the earthquake preparation zone several days prior to the Dalbandin earthquake. It is also observed that the amplitude and frequency of foF2 anomalies are more prominent at the nearest station to the epicenter as compared to those stations near the outer margin of the earthquake preparation zone. The confidence level for ionospheric anomalies regarding the seismic signatures can be enhanced by adding the analysis of some other ionospheic parameters along with critical frequency of the layer F2.

关键词：电离层异常电离层扰动临界频率巴基斯坦地震前地震效应地震预测伊斯兰堡

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Investigation of Mesoscale Available Potential Energy Spectra in a Simulated Tropical Cyclone

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Journal of Meteorological Research 2019年第6期33卷 1098-1112页

作者： Yuan WANG Lifeng ZHANG Jun PENG Yun ZHANG Tongfeng WEI College of Meteorology and Oceanography National University of Defense TechnologyNanjing 211101 Meteorology and space weather monitoring and Warning Center China Xi’an Satellite Control CenterXi’an 710000

We investigated the moist mesoscale available potential energy(APE)spectra and corresponding spectral budgets of an idealized tropical cyclone(TC).The APE is defined with respect to a dry air mass using a modified potential *** wavelengths below 500 km,the mesoscale APE spectra show a consistent quasi-linear shape and a–5/3 spectral slope in the troposphere and lower stratosphere during the mature period of the *** spectral APE budget in the troposphere is dominated by diabatic and energy conversion *** mesoscale APE is forcefully injected by the diabatic effect and immediately partially converted to other forms of energy by the buoyancy *** diabatic effect contains a positive contribution from the heating effect and a negative contribution from the dehumidifying effect,which weakens the heating effect by about 16%.The energy conversion tends toward the horizontal kinetic energy at larger scales and toward the gravitational potential energy of the total moist species at smaller *** the lower stratosphere,the mesoscale APE is primarily deposited by the three-dimensional divergent effect and removed by nonlinear interactions;however,the effect of the energy conversion is *** lower troposphere and lower stratosphere are governed by clear downscale and upscale APE cascades,respectively,whereas the mid-and upper tropospheric mesoscale APE spectra undergo more complex cascade processes.

关键词： energy spectra available potential energy moist atmosphere tropical cyclone

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