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BeiDou System Started Trial Operation at the End of 2011
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作者 Rain Liu 《Aerospace China》 2012年第1期9-9,共1页
On December 27,2011,Ran Chengqi,director of the China Satellite Navigation Office announced that,the BeiDou Navigation Satellite System (BeiDou system) had that day begun to provide initial operational service.
关键词 CASC OFFICE beidou system Started Trial Operation at the End of 2011
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BeiDou System Begins to Serve the World
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作者 ZONG Wen 《Aerospace China》 2018年第4期66-66,共1页
BeiDou 3 preliminary system is completed to provide global services.China Satellite Navigation Office announced at a press conference held at the State Council Information Office on December 27 that the BeiDou 3 preli... BeiDou 3 preliminary system is completed to provide global services.China Satellite Navigation Office announced at a press conference held at the State Council Information Office on December 27 that the BeiDou 3 preliminary system was completed to provide global services,signifying that the coverage of the BeiDou system now extends to global coverage from regional. 展开更多
关键词 OFFICE beidou system BEGINS to SERVE the World
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Data-Driven Heuristic Assisted Memetic Algorithm for Efficient Inter-Satellite Link Scheduling in the BeiDou Navigation Satellite System 被引量:7
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作者 Yonghao Du Ling Wang +2 位作者 Lining Xing Jungang Yan Mengsi Cai 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2021年第11期1800-1816,共17页
Inter-satellite link(ISL)scheduling is required by the BeiDou Navigation Satellite System(BDS)to guarantee the system ranging and communication performance.In the BDS,a great number of ISL scheduling instances must be... Inter-satellite link(ISL)scheduling is required by the BeiDou Navigation Satellite System(BDS)to guarantee the system ranging and communication performance.In the BDS,a great number of ISL scheduling instances must be addressed every day,which will certainly spend a lot of time via normal metaheuristics and hardly meet the quick-response requirements that often occur in real-world applications.To address the dual requirements of normal and quick-response ISL schedulings,a data-driven heuristic assisted memetic algorithm(DHMA)is proposed in this paper,which includes a high-performance memetic algorithm(MA)and a data-driven heuristic.In normal situations,the high-performance MA that hybridizes parallelism,competition,and evolution strategies is performed for high-quality ISL scheduling solutions over time.When in quick-response situations,the data-driven heuristic is performed to quickly schedule high-probability ISLs according to a prediction model,which is trained from the high-quality MA solutions.The main idea of the DHMA is to address normal and quick-response schedulings separately,while high-quality normal scheduling data are trained for quick-response use.In addition,this paper also presents an easy-to-understand ISL scheduling model and its NP-completeness.A seven-day experimental study with 10080 one-minute ISL scheduling instances shows the efficient performance of the DHMA in addressing the ISL scheduling in normal(in 84 hours)and quick-response(in 0.62 hour)situations,which can well meet the dual scheduling requirements in real-world BDS applications. 展开更多
关键词 beidou Navigation Satellite system(BDS) data-driven heuristic inter-satellite link(ISL)scheduling memetic algorithm METAHEURISTIC quick-response
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Tropospheric Wet Refractivity Tomography Based on the BeiDou Satellite System 被引量:4
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作者 WANG Xiaoying WANG Xianliang +4 位作者 DAI Ziqiang KE Fuyang CAO Yunchang WANG Feifei SONG Lianchun 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2014年第2期355-362,共8页
This paper presents a novel approach for assessing the precision of the wet refractivity field using BDS (BeiDou navigation satellite system) simulations only,GPS,and BDS+GPS for the Shenzhen and Hongkong GNSS netw... This paper presents a novel approach for assessing the precision of the wet refractivity field using BDS (BeiDou navigation satellite system) simulations only,GPS,and BDS+GPS for the Shenzhen and Hongkong GNSS network.The simulations are carried out by adding artificial noise to a real observation dataset.Instead of using the δ and σ parameters computed from slant wet delay,as in previous studies,we employ the Bias and RMS parameters,computed from the tomography results of total voxels,in order to obtain a more direct and comprehensive evaluation of the precision of the refractivity field determination.The results show that:(1) the precision of tropospheric wet refractivity estimated using BDS alone (only 9 satellites used) is basically comparable to that of GPS; (2) BDS+GPS (as of current operation) may not be able to significantly improve the data's spatial density for the application of refractivity tomography; and (3) any slight increase in the precision of refractivity tomography,particularly in the lower atmosphere,bears great significance for any applications dependent on the Chinese operational meteorological service. 展开更多
关键词 slant wet delay TOMOGRAPHY beidou algebraic reconstruction techniques (ART) wet refractivity GPS
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Development and Innovation of BeiDou Navigation Satellite System 被引量:2
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作者 XIE Jun ZHANG Jianjun 《Aerospace China》 2020年第4期5-10,共6页
The completion of the BeiDou global navigation satellite system has made China becoming the third country owning a global navigation satellite system independently.It has embarked on a development path with Chinese ch... The completion of the BeiDou global navigation satellite system has made China becoming the third country owning a global navigation satellite system independently.It has embarked on a development path with Chinese characteristics,enriched the development route of the world navigation satellite system,and enhanced China’s core competitiveness.The article describes the development and construction of Beidou Navigation Satellite System(BDS)and summaries the main achievements of BDS-1,BDS-2 and BDS-3 systems from the three aspects of independent innovation,system research and technological breakthrough.The article also analyzes the technical innovation characteristics of the BDS satellites comprehensively,providing a reference for subsequent research and planning of the next generation of the BDS satellites that are more ubiquitous,more integrated,and more intelligent. 展开更多
关键词 beidou NAVIGATION INNOVATION next generation
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The Compatible and Interoperable BeiDou Satellite Navigation System
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作者 CHEN BIAO QI XIAOJUN 《China Today》 2020年第7期42-45,共4页
CHINA launched the last satellite of the BeiDou Navigation Satellite System(BDS),the 55th in the BeiDou family,on June 23 in Xichang Satellite Launch Center in Sichuan Province.It marks the completion of the deploymen... CHINA launched the last satellite of the BeiDou Navigation Satellite System(BDS),the 55th in the BeiDou family,on June 23 in Xichang Satellite Launch Center in Sichuan Province.It marks the completion of the deployment of China’s own global navigation system.On its journey to explore a path of developing a navigation satellite system suitable for its national conditions since the late 20th century,China formulated a three-step strategy of development for BDS:to complete the construction of BDS-1 and provide services to the whole country by the end of 2000;to complete the construction of BDS-2 and provide services to the Asia-Pacific region by the end of 2012;and to complete the construction of BDS and provide services worldwide around 2020. 展开更多
关键词 Province. beidou SERVICES
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Design of Space-based PNT System Based on BeiDou Navigation Satellite System
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作者 XIE Jun ZHANG Jianjun 《Aerospace China》 2018年第4期20-28,共9页
BeiDou navigation satellite system(the BeiDou system) is the only PNT(Positioning, Navigation and Tim-ing) resource in China that has coverage of the globe and near-Earth space and provides continuous high-precision,l... BeiDou navigation satellite system(the BeiDou system) is the only PNT(Positioning, Navigation and Tim-ing) resource in China that has coverage of the globe and near-Earth space and provides continuous high-precision,low-cost positioning, navigation and timing solutions for users in a unified spatio-temporal benchmark. As an importantspatio-temporal benchmark transmission system, the BeiDou system is the most important resource for the nationalPNT system to provide a PNT capability under a unified spatial-temporal benchmark. This paper proposes the con-cept, composition and development model of the space-based PNT system design based on the BeiDou system withall its space characteristics, as well as the advantages of the system. It opens up a new direction for the construction ofChina's PNT system and expands a new horizon in the research of a PNT system in China. 展开更多
关键词 beidou NAVIGATION SATELLITE system PNT systems engineering THEORY
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Evaluating Model and BeiDou Based Management System for Scale Operation of Cotton-Pickers
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作者 Caicong Wu Peng Qiao +2 位作者 Jing Zhao Jie Wang Yaping Cai 《Positioning》 2016年第1期21-31,共11页
For scale cotton-picker operation, combination of production resources including field, machine, and drivers, should be organized reasonably both in temporal and spatial dimensions. Xinjian Agri. is such a scale cotto... For scale cotton-picker operation, combination of production resources including field, machine, and drivers, should be organized reasonably both in temporal and spatial dimensions. Xinjian Agri. is such a scale cotton picking service company, which owns more than 400 cotton-pickers, hires nearly 1000 personnel, and works for more than ten big farms each season. The total operation area is about 90,000 ha. In this paper, a Cotton-picker Operation Scheduling & Monitoring System (CPOSMS) was developed for Xinjian Agri. CPOSMS is a WebGIS and BeiDou based management software, which includes four main function modules. Overall scheduling module aims to help the company to create machine fleets for the farms based on operation demands and operation capacity. A real-time evaluation model was studied to adjust the rationality. Local scheduling module is to dispatch machines and personnel to form machine unit. Central navigating module is to guide staff to specific field. Operation monitoring module is to monitor and analyze operation process. Experiments in 2015 showed that the CPOSMS is the necessary tool for the company, and the evaluation model and BeiDou based system can improve management efficiency. 展开更多
关键词 Cotton-Picker Operation Scheduling Model system beidou
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Beidou receiver based on anti-jamming antenna arrays with self-calibration for precise relative positioning
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作者 AN Yi KANG Ronglei +1 位作者 BAN Yalong YANG Shaoshuai 《Journal of Systems Engineering and Electronics》 SCIE CSCD 2024年第5期1132-1147,共16页
Unmanned aerial vehicles(UAVs)may be subjected to unintentional radio frequency interference(RFI)or hostile jamming attack which will lead to fail to track global navigation satellite system(GNSS)signals.Therefore,the... Unmanned aerial vehicles(UAVs)may be subjected to unintentional radio frequency interference(RFI)or hostile jamming attack which will lead to fail to track global navigation satellite system(GNSS)signals.Therefore,the simultaneous realization of anti-jamming and high-precision carrier phase difference positioning becomes a dilemmatic problem.In this paper,a distortionless phase digital beamforming(DBF)algorithm with self-calibration antenna arrays is proposed,which enables to obtain distortionless carrier phase while suppressing jamming.Additionally,architecture of high precision Beidou receiver based on anti-jamming antenna arrays is proposed.Finally,the performance of the algorithm is evaluated,including antenna calibration accuracy,carrier phase distortionless accuracy,and carrier phase measurement accuracy without jamming.Meanwhile,the maximal jamming to signal ratio(JSR)and real time kinematic(RTK)positioning accuracy under wideband jamming are also investigated.The experimental results based on the real-life Beidou signals show that the proposed method has an excellent performance for precise relative positioning under jamming when compared with other anti-jamming methods. 展开更多
关键词 beidou receiver antenna array ANTI-JAMMING high precision distortionless carrier phase
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BeiDou Regional Navigation Satellite System Completed
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作者 Liu Fei 《Aerospace China》 2012年第4期6-8,共3页
As the 16th BeiDou navigation satellite was successfully launched into space at 23:33 Beijing Time from the Xichang Satellite Launch Center (XSLC) on October 25, 2012, China completed the construction of the BeiDou Re... As the 16th BeiDou navigation satellite was successfully launched into space at 23:33 Beijing Time from the Xichang Satellite Launch Center (XSLC) on October 25, 2012, China completed the construction of the BeiDou Regional Navigation Satellite System that starts to officially provide services for most parts of the Asia-Pacific region from December 27. The 16th BeiDou navigation satellite, the last one for the regional BeiDou system, was developed by China Academy of Space Technology under CASC. 展开更多
关键词 DFH CASC beidou Regional Navigation Satellite system Completed JUN IGSO
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LM-3B Launched the Penultimate BeiDou-3 Navigation System Satellite Successfully
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作者 LIU Yan 《Aerospace China》 2020年第1期56-56,共1页
A LM-3B launched the BeiDou 3 GEO-2 sallite into space at 19:55 Bei-jing time on March 9,2020,from the Xichang Satellite Launch Center.The satellite entered its predetermined orbit later,marking the success of the lau... A LM-3B launched the BeiDou 3 GEO-2 sallite into space at 19:55 Bei-jing time on March 9,2020,from the Xichang Satellite Launch Center.The satellite entered its predetermined orbit later,marking the success of the launch mission.As the 54th satellite in the BeiDou navigation satellite system and also the 29th BeiDou 3 stallite,the BeiDou 3 GEO 2 stlie,developed by the China Academy of Space Technology,is called the“lucky stllite”with the largest size,the longest designed service life and the most funcions. 展开更多
关键词 LAUNCH beidou SATELLITE
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Application and Prospect of BeiDou Navigation Satellite System in the Transportation Industry
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作者 LIU Yumei ZHANG Nuan +4 位作者 LIU Lijiao QIN Yiran GAO Ya WENG Yanyun LIU Jindan 《Aerospace China》 2020年第4期50-57,共8页
The transportation industry is one of the largest users of the BeiDou Navigation Satellite System(BDS),characterized by multiple locations,long lines,wide range,and extensive mobility.The application of BDS in the tra... The transportation industry is one of the largest users of the BeiDou Navigation Satellite System(BDS),characterized by multiple locations,long lines,wide range,and extensive mobility.The application of BDS in the transportation industry improves the development level of intelligent,safe,green and shared transportation.Based on the introduction of the application requirements and characteristics of BDS in the transportation industry,this paper systematically introduces the overall status of BDS in the transportation industry,covering highways,waterways,railways,civil aviation,and the postal service.Finally,the paper forecasts future applications of BDS in the field of transportation.It identifies within the transportation industry rich application scenarios for the cultivation of advanced technologies represented by BDS,enhancing transportation safety services and guaranteeing emergency communication,while improving the operation efficiency and management level of an integrated transportation system. 展开更多
关键词 beidou Navigation Satellite system TRANSPORTATION industry application application prospect
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BDSec:Security Authentication Protocol for BeiDou-Ⅱ Civil Navigation Message
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作者 Wu Zhijun Zhang Yuan +2 位作者 Yang Yiming Wang Peng Yue Meng 《China Communications》 SCIE CSCD 2024年第6期206-218,共13页
Due to the lack of authentication mechanism in BeiDou navigation satellite system(BDS),BD-Ⅱ civil navigation message(BDⅡ-CNAV) are vulnerable to spoofing attack and replay attack.To solve this problem,we present a s... Due to the lack of authentication mechanism in BeiDou navigation satellite system(BDS),BD-Ⅱ civil navigation message(BDⅡ-CNAV) are vulnerable to spoofing attack and replay attack.To solve this problem,we present a security authentication protocol,called as BDSec,which is designed by using China’s cryptography Shangyong Mima(SM) series algorithms,such as SM2/4/9 and Zu Chongzhi(ZUC)algorithm.In BDSec protocol,both of BDⅡ-CNAV and signature information are encrypted using the SM4 algorithm(Symmetric encryption mechanism).The encrypted result is used as the subject authentication information.BDSec protocol applies SM9 algorithm(Identity-based cryptography mechanism) to protect the integrity of the BDⅡ-CNAV,adopts the SM2 algorithm(Public key cryptosystem) to guarantee the confidentiality of the important session information,and uses the ZUC algorithm(Encryption and integrity algorithm) to verify the integrity of the message authentication serial number and initial information and the information in authentication initialization sub-protocol respectively.The results of the SVO logic reasoning and performance analysis show that BDSec protocol meets security requirements for the dual user identity authentication in BDS and can realize the security authentication of BDⅡ-CNAV. 展开更多
关键词 BDII civil navigation messages(BDIICNAV) beidou navigation satellite system(BDS) identity-based cryptography mechanism navigation message authentication protocol(BDSec)
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Construction of BDS Spatiotemporal Information Agricultural Product Digital Credit System
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作者 Guifei JING Chen MIAO +4 位作者 Hengxue LUO Jiang XU Xiaoyuan PENG Yang CUN Xinghu LI 《Asian Agricultural Research》 2024年第6期25-32,54,共9页
Spatiotemporal information,positioning and navigation services have become important elements of new type infrastructure.The rapid development of global digital trade provides a large-scale application scenario for th... Spatiotemporal information,positioning and navigation services have become important elements of new type infrastructure.The rapid development of global digital trade provides a large-scale application scenario for the use of Beidou Navigation Satellite System(BDS)spatiotemporal information to support the certification of origin of agricultural products.The BDS spatiotemporal information agricultural product digital credit system uses such modules as BDS,spatiotemporal information collection,spatiotemporal coding,and spatiotemporal blockchain.It incorporates multi-level joint supervision mechanisms such as government,associations,and users.Starting from the initial production link of agricultural products,it realizes the correspondence and locking of online and offline products,effectively improves the integrity and credibility of information in the production process,finished product quality and circulation process of products,effectively manages the green production and anti-channel conflicts of producers,and provides credible information for consumers,thus realizing the digital credit certification of products.The successful practice of characteristic agricultural products in Yunnan Province has verified the application ability of the BDS spatiotemporal information agricultural product digital credit system.This system has played a significant role in promoting the online and offline locking,credible information,effective supervision and high quality and high price of characteristic agricultural products from the field.The BDS provides services for global digital trade and contributes to the further enhancement of the global application scale of GNSS. 展开更多
关键词 beidou Navigation Satellite system (BDS) SPATIOTEMPORAL blockchain DIGITAL CREDIT of AGRICULTURAL products DIGITAL TRADE
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Networking of BeiDou Navigation Satellite System Accelerated with Two New Members
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《Aerospace China》 2012年第2期21-21,共1页
At 4:50 on April 30, China's LM-3B/I rocket, an improved type based on LM-3B, made its debut at the Xichang Satellite Launch Center and successfully sending the 12th and 13th BeiDou Navigation Satellite System sat... At 4:50 on April 30, China's LM-3B/I rocket, an improved type based on LM-3B, made its debut at the Xichang Satellite Launch Center and successfully sending the 12th and 13th BeiDou Navigation Satellite System satellites into the planned transfer orbit in space. It was the first time that China launched two BeiDou satellites with one rocket. It was 展开更多
关键词 Networking of beidou Navigation Satellite system Accelerated with Two New Members
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China Launches the 11th BeiDou Satellite in Navigation Satellite System
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《Aerospace China》 2012年第1期24-24,共1页
China launched the 11th BeiDou navigation satellite in their BeiDou Navigation Satellite System.The satellite was launched from the Xichang Satellite Launch Center in Sichuan Province on a LM-3C rocket at 0:12 on Febr... China launched the 11th BeiDou navigation satellite in their BeiDou Navigation Satellite System.The satellite was launched from the Xichang Satellite Launch Center in Sichuan Province on a LM-3C rocket at 0:12 on February 25 (Beijing time) and was put into the predetermined transfer orbit successfully.The geostationary satellite is the first BeiDou navigation satellite launched in 2012 for the 展开更多
关键词 China Launches the 11th beidou Satellite in Navigation Satellite system
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基于北斗系统的粤港澳大湾区长带状城际铁路高精度施工基准建立和维持方法
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作者 余锐 高建伟 +1 位作者 张郁 张栓 《测绘工程》 2025年第2期64-74,共11页
为了解决粤港澳大湾区长带状城际铁路坐标基准投影变形问题,提出了基于北斗卫星导航基准站网的基准建立和施工控制网联动及稳定性评估方法,详细论述了高斯投影长度变形影响及解决方案、工程独立坐标系的建立和维持方法、高程基准的差异... 为了解决粤港澳大湾区长带状城际铁路坐标基准投影变形问题,提出了基于北斗卫星导航基准站网的基准建立和施工控制网联动及稳定性评估方法,详细论述了高斯投影长度变形影响及解决方案、工程独立坐标系的建立和维持方法、高程基准的差异解决方案,针对不同地形分别给出了2种解决方案,符合投影变形限差的比例均可以达到89.78%以上,并以南珠中城际铁路为实例,论证了该方法的可行性,为类似长带状交通工程提供技术参考与借鉴。 展开更多
关键词 北斗系统 区域基准 城际铁路 投影变形 工程坐标系
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BDS/三维扫描融合公路施工监测方法
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作者 高成发 沈沂 魏建雄 《导航定位学报》 北大核心 2025年第1期12-20,共9页
为了进一步提升北斗卫星导航系统(BDS)高精度定位和三维激光扫描技术在路面施工监测中的精度,提出一种BDS/三维激光扫描模型构建的路面施工监测方法:依托高速公路BDS地基增强系统,研究分析BDS四频单历元快速定位方法,并验证BDS高精度定... 为了进一步提升北斗卫星导航系统(BDS)高精度定位和三维激光扫描技术在路面施工监测中的精度,提出一种BDS/三维激光扫描模型构建的路面施工监测方法:依托高速公路BDS地基增强系统,研究分析BDS四频单历元快速定位方法,并验证BDS高精度定位与三维激光扫描技术融合的可行性,以有效提升监测的高程精度和工作效率;然后将BDS高定位结果用于三维点云的纠偏与拼接,构建BDS/三维激光扫描融合模型,并开发相应的应用系统。施工测试结果表明:利用该方法可构建测区三维模型,并实现连续的路面监测;测区整体高程监测精度优于2.9 mm,能够满足高速公路路基施工毫米级路面监测的精度要求。 展开更多
关键词 北斗卫星导航系统(BDS) 高精度定位 三维激光扫描 高速公路 施工 路面监测
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基于FFT的北斗信号快速并行捕获算法研究
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作者 张涛 《成都工业学院学报》 2025年第1期44-49,共6页
为研究如何捕获北斗卫星信号,对捕获信号的整个过程进行仿真。通过逆快速傅里叶变换(IFFT)对传统快速傅里叶变换(FFT)信号捕获算法进行改进,利用傅里叶变换系数X_(k)与C_(k)^(*)相乘再作IFFT,在时域内对信号x_(n)进行频率补偿,再做FFT... 为研究如何捕获北斗卫星信号,对捕获信号的整个过程进行仿真。通过逆快速傅里叶变换(IFFT)对传统快速傅里叶变换(FFT)信号捕获算法进行改进,利用傅里叶变换系数X_(k)与C_(k)^(*)相乘再作IFFT,在时域内对信号x_(n)进行频率补偿,再做FFT就等效于循环移位完成。通过在MATLAB仿真环境中对北斗信号各阶段的频谱进行分析,比较改进FFT算法与传统FFT算法的信号捕获误码率。结果表明,改进后的FFT算法的北斗信号频谱变化稳定,与传统FFT算法相比信号捕获精度和灵敏度更高。在90%捕获概率下,改进FFT算法可使接收机的灵敏度提高2 dB。 展开更多
关键词 卫星导航系统 北斗信号 FFT捕获算法 改进
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