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Chinese Surveying and Control Network for Earth-Orbit Satellites and Deep Space Detection

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Geo-Spatial Information Science 2006年第1期9卷 6-12,37页

作者： wei erhu LIU Jingnan SHI Chuang School of Geodesy and Geomatics Wuhan University 129 Luoyu Road Wuhan 430079 China

The relationship between the surveying and contro l network(CSN) for earth-orbit satellite and spatial geodesy, and the relationshi p between the CSN for deep space celestial bodies and detectors, and deep space detection are briefly summarized, and so are the basic technical needs of the de ep space surveying and control network(DSN). Then, the techniques, the constitue nts and the distributing of Chinese satellite CSN (CSCSN) and other radio observ ing establishments in China are introduced. Lastly, with the primary CSCSN and o ther observing establishments, some projects for China to rebuild a more perfect CSCSN, and to establish a DSN are analyzed and stated.

关键词： satellite surveying and control network DSN microwave radio radar LLR DSCCs radio observation space-based station

Effect of lunar gravity models on Chang'E-2 orbit determination using VLBI tracking data

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Geodesy and Geodynamics 2016年第6期7卷 406-415页

作者： erhu wei Xuechuan Li Shuanggen Jin Jingnan Liu School of Geodesy and Geomatics Wuhan UniversityWuhan 430079China Collaborative Innovation Center for Geospatial Technology 129 Luoyu RoadWuhan 430079China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China GNSS Research Center Wuhan UniversityWuhan 430079China

The precise orbit determination of ChanE-2 is the most important issue for successful mission and scientific applications, while the lunar gravity field model with big un- certainties has large effect on Chang＇E-2 orbit determination. Recently, several new gravity models have been produced using the latest lunar satellites tracking data, such as LP16SP, SGM1SOJ, GL0900D and GRGM900C. In this paper, the four gravity models mentioned above were evaluated through the power spectra analysis, admittance and coherence analysis. Effect of four lunar gravity models on Chang＇E-2 orbit determination performance is investigated and assessed using Very Long Baseline Interferometry （VLBI） tracking data. The overlap orbit analysis, the posteriori data residual, and the orbit prediction are used to evaluate the orbit precision between successive arcs. The LPI65P model has better orbit overlap performance than the SGM150J model for Chang＇E-2100 km x 100 km orbit and the SGM150J model performs better for Chang＇E-2100 km x 15 km orbit, while GL0900D and GRGM900C have the best orbit overlap results for the two types of Chang＇E-2 orbit. For the orbit prediction, GRGM900C has the best orbit prediction performance in the four models.

关键词： Lunar gravity modelChang'E-2Very Long Baseline Interferometry(VLBI)Orbit determinationOrbit prediction

Estimation of Geodetic Parameters with VLBI Data of Last 5 Years

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Geo-Spatial Information Science 2007年第1期10卷 12-16页

作者： wei erhu LIU Jingnan SHI Chuang School of Geodesy and Geomatics Wuhan University 129 Luoyu Road Wuhan 430079 China.

The meaning to research the potential of VLBI for geodetic applications is summarized. And the observation models and their related parameters of geodetic interest are investigated. Then, the principle and method of using the random model in VLBI data processing are investigated. With the world wide VLBI data from 2000-2004, the conditions to compute the parameters of geodetic interest are introduced, and so are the computing methods and processes. And the computed resuits of the parameters of geodetic interest are analyzed.

关键词： VLBI observation model parameters of geodetic interest random model computation and analysis

Remote Measurement in Steel Grid Structure Based on Control Grid Network

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Geo-Spatial Information Science 2009年第4期12卷 303-306页

作者： YI Xiaodong YI Xuefeng wei erhu School of Civil and Hydraulics Dalian Univ. of Technol. 2 Linggong Road Dalian 116024 China School of Geodesy and Geomatics Wuhan University 129 Louyu Road Wuhan 430079 China

Based on a control grid network and in combination with a remote total station and digital camera,the distribution of steel nodes and deflection curve of a steel grid structure can be obtained *** measurement result s... 详细信息

关键词： steel grid structure ball nodal point control grid network image coordinate 3D digital model

On the Generation Algorithm of VRS Virtual Observations

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Geo-Spatial Information Science 2007年第2期10卷 91-95页

作者： wei erhu CHAI Hua LIU Jingnan AN Zhiguo School of Geodesy and Geomatics Wuhan University 129 Luoyu Road Wuhan 430079 China Key Lab. of Geospace Enviroment and Geodesy MEC 129 Luoyu Road Wuhan 430079 China

In the past few years, network RTK positioning technology, especially the VRS technology, has been widely used in some parts of China and in many countries around the world. The principle of the VRS technology is discussed with corresponding formula deduction, and detailed descriptions and applications of VRS corrections and virtual observations generation algorithm are given.

关键词： network-RTK MRS corrections generation algorithm virtual observation

自适应滤波在环火探测器脉冲星自主导航中的应用

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武汉大学学报（信息科学版） 2015年第5期40卷 701-705页

作者：魏二虎张帅 wei Jianan 武汉大学测绘学院湖北武汉430079 地球空间信息技术协同创新中心湖北武汉430079 新南威尔士大学建筑环境学院

脉冲星自主导航技术能够提供连续、高精度的导航定位信息和高精度的时间标准,能为深空和星际飞行器的自主导航提供有效技术支撑。针对如何提高环火探测器自主导航的精度,并为其提供快速、可靠的导航信息,本文设计了一款自适应扩展卡尔... 详细信息

脉冲星自主导航技术能够提供连续、高精度的导航定位信息和高精度的时间标准,能为深空和星际飞行器的自主导航提供有效技术支撑。针对如何提高环火探测器自主导航的精度,并为其提供快速、可靠的导航信息,本文设计了一款自适应扩展卡尔曼滤波器(AEKF)滤波器。仿真数值实验表明,探测器的三个轴向位置精度能够迅速收敛,X轴向收敛精度优于1 000m,Y、Z轴向收敛精度优于350m;三个轴向速度精度也能经过数十个历元后稳定在0.05m/s以内。此外,AEKF能够有效克服滤波初始状态偏差的影响,较快地获得相当精度的状态估值。

关键词：自适应扩展卡尔曼滤波环火探测器 X射线脉冲星自主导航

Earth Rotation Parameter Estimation from GNSS and Its Impact on Aircraft Orbit Determination

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Earth Rotation Parameter Estimation from GNSS and Its Impact...

Design of Geodetic SVLBI Satellite Orbit and Its Tracking Network

第五届中国卫星导航学术年会

作者： Lihua Wan erhu wei Shuanggen Jin School of Geodesy and Geomatics wuhan University Key Laboratory of Geospace Environment and Geodesy Ministry of Education Shanghai Astronomical Observatory Chinese Academy of Sciences

ISBN: (纸本)9783642547362

Earth rotation parameters （ERP） play a key role in connecting the International Celestial Reference Frame （ICRF） and the International Terrestrial Reference Frame （ITRF）. Furthermore, high precision orbit determination and positioning need the precise ERPs, while ERPs are closely related the geophysical fliud mass redistribution and geodynamics. In this paper, global uniformly distributed 75 IGS stations with more than 60 sites tracking GPS+GLONASS simultaneously are selected to estimate Earth Rotation Parameters. Accuracy and method to improve ERP from only IGS stations in and neighboring China are also analyzed in order to provide the reference for BeiDou ERP estimation. The results show that the precision of Polar motion （PM） estimated from daily GPS and GLONASS observations can be achieve at the precision of 0.066 mas and 0.157 mas, respectively and the precision of length of day （LOD） can achieve at 0.0283ms and 0.0289ms when compared to IERS C04 solutions, respectively. The precision of PM and LOD from regional stations with daily GPS （GLONASS） observations are better than 0.178mas （0.365mas） and 0.0291ms （0.0360ms）, respectively. The precision of PM and LOD from combined GPS+GLONASS are between than 0.153mas and 0.0292ms. In addition, the impact of ERP error on aircraft orbit is furthermore discussed. The impact on the LOD is greater than the PM. The orbital error can respectively reach 1 m, 1m and 0.1m in X, Y and Z direction with 0.5mas error in PM and 0.5ms error in LOD.

关键词： ERP GNSS Aircraft orbit Variance components estimation

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Geo-Spatial Information Science 2008年第1期11卷 6-12页

作者： wei erhu LIU Jingnan KULKARNI M.N. FREY Sándor School of Geodesy and Geomatics Wuhan University 129 Luoyu Road Wuhan 430079 China the Key Laboratory of Geospace Environment and Geodesy Ministry of Education Wuhan University 129 Luoyu Road Wuhan 430079 China 不详

SVLBI （space very long baseline interferometry） has some important potential applications in geodesy and geodynamics, for which one of the most difficult tasks is to precisely determine the orbit of an SVLBI satellite. This work studies several technologies that will possibly be able to determine the orbit of a space VLBI satellite. Then, according to the types and charac- teristics of the satellite and the requirements for geodetic study and the geometry of the GNSS （GPS, GALILEO） satellite to track the space VLBI satellite, the six Keplerian elements of the SVLBI satellite （TEST-SVLBI） are determined. A program is designed to analyze the coverage area of space of different altitudes by the stations of the network, with which the tracking network of TEST-SVLBI is designed. The efficiency of tracking TEST-SVLBI by the network is studied, and the results are presented.

关键词： SVLBI precise orbit determination orbit design tracking network

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我国发射射电卫星的作用及关键技术研究

武汉大学学报（信息科学版） 2005年第10期30卷 847-852页

作者：刘经南魏二虎武汉大学校长办公室武汉市珞珈山430072 武汉大学测绘学院武汉市珞喻路129号430079

论述了我国发射射电卫星对于天文学和射电天文方法的发展、我国月球及深空探测计划、大地测量和天文地球动力学的研究和发展等方面的意义;根据VLBI卫星的技术和应用特点,分析了射电望远镜及相关设施的技术要求和指标,比较全面地分析和... 详细信息

论述了我国发射射电卫星对于天文学和射电天文方法的发展、我国月球及深空探测计划、大地测量和天文地球动力学的研究和发展等方面的意义;根据VLBI卫星的技术和应用特点,分析了射电望远镜及相关设施的技术要求和指标,比较全面地分析和总结了VLBI卫星及相关设施的关键技术和方法。

关键词：射电卫星射电卫星空间组网地面服务站定轨时间同步深空探测