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Evaluation of global navigation satellite system spoofing efficacy

Journal of Systems Engineering and Electronics 2022年第6期33卷 1238-1257页

作者： WANG Yue sun fuping HAO Jinming ZHANG Lundong WANG Xian PLA Strategic Support Force Information Engineering University Henan 450001China

The spoofing capability of Global Navigation Satellite System(GNSS)represents an important confrontational capability for navigation security,and the success of planned missions may depend on the effective evaluation of spoofing ***,current evaluation systems face challenges arising from the irrationality of previous weighting methods,inapplicability of the conventional multi-attribute decision-making method and uncertainty existing in *** solve these difficulties,considering the validity of the obtained results,an evaluation method based on the game aggregated weight model and a joint approach involving the grey relational analysis and technique for order preference by similarity to an ideal solution(GRA-TOPSIS)are firstly proposed to determine the optimal *** and dynamic evaluation results under different schemes are then obtained via a fuzzy comprehensive assessment and an improved dynamic game method,to prioritize the deceptive efficacy of the equipment accurately and make pointed improvement for its core *** use of judging indicators,including Spearman rank correlation coefficient and so on,combined with obtained evaluation results,demonstrates the superiority of the proposed method and the optimal scheme by the horizontal comparison of different methods and vertical comparison of evaluation ***,the results of field measurements and simulation tests show that the proposed method can better overcome the difficulties of existing methods and realize the effective evaluation.

关键词： Global Navigation Satellite System(GNSS)spoofing index system for spoofing strategy game aggregated weight model grey relational analysis and technique for order preference by similarity to an ideal solution(GRA-TOPSIS)method dynamic game method

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Full-domain collaborative deployment method of multiple interference sources and evaluation of its deployment effect

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Defence Technology（防务技术） 2024年第2期32卷 572-595页

作者： Yue Wang fuping sun Xian Wang Jinming Hao Kai Xiao School of Geospatial Information The PLA Information Engineering UniversityZhengzhou 450001HenanChina

This paper realizes the full-domain collaborative deployment of multiple interference sources of the global satellite navigation system(GNSS)and evaluates the deployment effect to enhance the ability to disturb the attacker and the capability to defend the GNSS during navigation *** evaluation indicators for the jamming effect of GNSS suppressive and deceptive jamming sources are first created,their evaluation models are built,and their detection procedures are sorted out,as the basis for determining the deployment *** principles for collaboratively deploying multi-jamming sources are developed to obtain the deployment structures(including the required number,structures in demand,and corresponding positions)of three single interference sources required by collaboratively ***,simulation and hardware-in-loop testing results are presented to determine a rational configuration of the collaborative deployment of multi-jamming sources in the set situation and further realize the full-domain deployment of an interference network from ground,air to *** evaluation indices for the deployment effect are finally developed to evaluate the deployment effect of the proposed configuration and further verify its reliability and rationality.

关键词： Jamming effect Multiple interference sources Collaborative deployment Effect evaluation Defense capability

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Detection of unsymmetrical global tectonic change by using space geodetic data

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Chinese Science Bulletin 2000年第7期45卷 639-643页

作者： sun fuping ZHAO Ming NING Jinsheng CHAO Dingbo Zhengzhou Institute of Surveying and Mapping Zhengzhou 450052China Shanghai Observatory Chinese Academy of SciencesShanghai 200030China Wuhan Technical University of Surveying and Mapping Wuhan 430070China

The global tectonic change deduced from geophysical research was first identified by space geodetic data from VLBI, GPS and SLR measurements. whether using geodesic rates or using vertical velocities of stations, three kinds of data and their integration give consistent results: within the mid-latitude belt on the Northern Hemisphere there may be about 8 - 10 mm/a contracting change; within the mid-latitude belt on the Southern Hemisphere there may be about 12-14 mm/a expanding change. This result not only validates the reverse global tectonic change in the Southern and Northern Hemispheres of the Earth, but also gives relatively precise quantative estimations.

关键词： space geodesy measuring site velocities global tectonic change.

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Effect of the Oxidation Time on Properties of Ceramic Coatings Produced on Ti-6Al-4V by Micro-Arc Oxidation

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Journal of Materials Science & Technology 2005年第2期21卷 281-284页

作者： Zhaohua JIANG, Xuetong sun, Yanping LI, fuping WANG and Yandong LU Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China Dept. of Appl. Chem. Harbin Inst. of Technol. Harbin 150001 China

Ceramic coatings were prepared on Ti-6AI-4V alloy using ac micro-arc oxidation (MAO) in silicate-hypophosphate solution. Growth regularity and formation mechanism of ceramic coatings were discussed. It was found that during the first stage the growth rate of coatings toward the external surface was larger than that toward substrate and then the coating began to grow mainly towards Ti alloy. When the total coating thickness reaches a certain value, it would no longer increase. In addition, the variations of the composition and microstructure of ceramic coatings according to the depositing time were also investigated with X-ray diffraction (XRD) and scanning electron microscope (SEM). The amount of rutile TiO2 gradually increased, whereas the amounts of the anatase TiO2 and amorphous phases first increased and then decreased slightly.

关键词： Titanium alloy Ceramic coating Oxidation time Thickness

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Research and progress of Beidou satellite navigation system

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Science China(Information Sciences) 2012年第12期55卷 2899-2907页

作者： sun fuping ,LIU Shuai,ZHU XinHui & MEN BaoHong College of Navigation and Aerospace Engineering,Information Engineering University,Zhengzhou 450052,China 1. College of Navigation and Aerospace Engineering Information Engineering University Zhengzhou 450052 China

The paper gives a brief review of the development course and strategic planning of Beidou satellite navigation system,and introduces its construction progress,with emphasis on the research progress of some key technologies of Beidou,including navigation constellation design,navigation signal structure and performance,compatibility and interoperability,precise orbit determination,navigation and precise *** main problems and challenges of Beidou are described.

关键词： Beidou satellite navigation system navigation constellation design navigation signal structure and performance compatibility and interoperability precise orbit determination navigation and precise positioning

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Maintenance of Millimeter-level Geodetic Reference Framework

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Journal of Geodesy and Geoinformation Science 2023年第3期6卷 9-18页

作者： Yamin DANG Hu WANG fuping sun Guangwei JIANG Xinhui ZHU Yingyan CHENG Qiang YANG Yingying REN Jing JIAO Chinese Academy of Surveying and Mapping Beijing 100036China Institute of Geospatial Information Information Engi-neering UniversityZhengzhou 450052China Geodetic Data Processing Centre of Ministry of Natural Resources Xi’an 710054China College of Surveying and Geo-Informatics Tongji UniversityShanghai 200092China

The high-precision terrestrial reference frame,as the spatial benchmark for geodesy,is an important national ***,due to the influence of nonlinear factors related to geophysical phenomena,the overall maintenance accuracy of the ITRF framework is still at the centimeter ***,accurately characterizing the true trajectories of linear motion,nonlinear motion,and geocentric motion of the reference station is the key to achieve the construction and maintenance technology of a millimeter level terrestrial reference *** on long-term global and regional GNSS observation data,more Chinese geodesy scientists devoted much efforts to the maintenance of millimeter-level geodetic reference *** main contributions of this work included the followings:①Dynamic maintenance of millimeter-level terrestrial reference frame;②Research progress on the method of maintenance of regional reference frame based on GNSS;③The progress of CGCS2000 frame maintenance in millimeter level accuracy;④Reprocessing and reanalysis of two-decade GNSS observation in continental China;⑤Research on current GNSS velocity field model and deformation in Chinese mainland;⑥The preliminary realization and evaluation of CTRF2020.

关键词： reference framework millimeter level dynamic maintenance repro3 BDS3 CTRF2020

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The analysis of GPS seasonal systematic error based on co-location sites

The analysis of GPS seasonal systematic error based on co-lo...

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第四届中国卫星导航学术年会

作者： Tian Liang sun fuping Xi'An surveying and mapping station Information Engineering University

Make comparison between GPS、SLR and VLBI’s site coordinate seasonal non-linear variations with the collocation site’s coordinate vertical residuals. There are some comparability with those seasonal movements calculated by three space technologies. But the amplitude of vibration is different. The amplitude of vibration calculated by SLR is nearly the same with VLBI, different with GPS. The maximum difference is about 7 mm. So we conclude that there are some relativity between the errors and GPS seasonal systematic error.

关键词： co-location site site coordinate residuals FFT seasonal systematic error

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Kalman filter applied in underwater integrated navigation system

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Geodesy and Geodynamics 2013年第1期4卷 46-50页

作者： Yan Xincun Ouyang Yongzhong sun fuping Fan Hui Institute of Surveying and Mapping Information Engineering University Naval Institute of Hydrographic Surveying and Charting School of Geodesy and Geomatics Wuhan University

For the underwater integrated navigation system, information fusion is an important technology. This paper introduces the Kalman filter as the most useful information fusion technology, and then gives a summary of the Kalman filter applied in underwater integrated navigation system at present, and points out the further research directions in this field.

关键词： Kalman filter underwater integrated navigation system information fusion technology

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Study on the Earth’s volume change by using space observed technology

Study on the Earth’s volume change by using space observed ...

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第四届中国卫星导航学术年会

作者： Xinhui Zhu fuping sun Ren Wang Information and Engineering University Navigation and Aerospace Engineering Institute

Although plate tectonics already being the studying basis and mainstream of global tectonics nowadays, theories of expanding or compressing about the Earth have not been ceased in deed, which were still the main objects of investigating and searching proofs for many geoscientists. In the research of plate tectonics, a basic hypothesis which has been used until now is that the solid Earth’s volume （or radius） keeps unchanging because the lithosphere’s expanding and compressing could be compensated mutually. Whether and in which time scale these hypothesizes is correct or not, that has not been proved rigorously. Along with the development of space techniques and improvement of geodetic precision, it is possible to detect and resolve above problems in the help of more and higher precision observations and stations distributing globally. The earth’s unsymmetrical phenomenon and the doctrine of its expansion and compression was discussed and expounded. After a detailed analysis of the status of global change phenomena research, one data processing method by unifying the global vertical velocity to the optimal global crustal vertical motion reference datum was put forward. Then the solid earth’s volume and radius change were detected by using Delaunay arithmetic and plate motion model interpolation method. The result shows that the earth volume’s change rate is （-0.0379±0.0902）×103km3/a, which is similar to （-0.1±0.2）mm/a after being converted to the change of the earth’s radius, and is close to the result （near to -0.24mm/a） by using global observed station’s radial velocity. The conclusion is that the radius of the earth cannot be considered changed in the range of one time mean error, which is corresponded to the results of others by using space observed data and physical geography information.

关键词： Space-geodetic data Earth Asymmetrical deformation Delaunay triangle gridding Reference datum of global vertical crustal motion

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三频差分GNSS/INS紧组合模型

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中国惯性技术学报 2018年第2期26卷 180-186页

作者：肖凯孙付平王浩源解放军战略支援部队信息工程大学郑州450001

北斗卫星导航系统已经提供三频信号的位置服务。针对目前尚无关于北斗三频信号的GNSS/INS紧组合研究的现状,将三频模糊度解算算法与紧组合结合,构建了三频差分GNSS/INS紧组合模型。给出了新模型的观测方程和模糊度解算方法,分析了新模... 详细信息

北斗卫星导航系统已经提供三频信号的位置服务。针对目前尚无关于北斗三频信号的GNSS/INS紧组合研究的现状,将三频模糊度解算算法与紧组合结合,构建了三频差分GNSS/INS紧组合模型。给出了新模型的观测方程和模糊度解算方法,分析了新模型的优点。进行了车载组合导航实验对比新模型与经典模型,结果表明:新模型的解算时间消耗远少于经典模型,在9颗可视卫星时,新模型的总解算时间仅为经典模型的55.53%;卫星数的增加对新模型解算时间的影响不显著;新模型能够获得和经典模型相当的精度,位置差别均方根在毫米级,速度差别均方根在厘米级,姿态差别均方根在0.01°级别。新模型利用了三频模糊度解算速度快的优点,又有效地削弱了其不稳定性对定位结果的影响,为基于三频信号的GNSS/INS紧组合做了前沿性研究。

关键词： GNSS/INS 紧组合三频模糊度解算算法北斗卫星导航系统三频信号

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