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Guo Shuren, Jiang Kun, Li Xing, Liu Gang, Li Ping, Li Linze, Guo Siyuan
Strategic Study of CAE 2023, Volume 25, Issue 2, Pages 50-58 doi: 10.15302/J-SSCAE-2023.02.006
Satellite navigation has all-weather, all-time, and low-cost advantages and has become the most widely used means of positioning, navigation, and timing (PNT) service since its inception. However, to avoid excessive reliance on the single means of satellite navigation at the application level, the concept of satellite-independent navigation technology has been proposed and received attention. How to accurately understand the relationship between satellite and satellite-independent navigation technologies has become a realistic and urgent issue. The technological characteristics and system positioning of satellite navigation are summarized in this study. The performances, costs, and application scenarios of typical satellite independent navigation technologies such as inertial navigation, matching navigation, and radio navigation (except for satellite navigation) are comparatively analyzed from a PNT system perspective. The relationship between satellite and satellite-independent navigation technologies is comprehensively analyzed. The overall positioning of satellite navigation as the most common demand satisfied and the core and cornerstone of the PNT system is further clarified. Additionally, the fusion efficiency is quantitatively analyzed. The scientific development of China’s PNT system requires the innovative development of satellite-independent navigation technologies, and the deep integration of satellite and satellite-independent navigation technologies should be promoted. Moreover, the construction of low-orbit navigation systems should be accelerated to improve satellite navigation performance and maximizing system contribution.
Keywords： positioning navigation and timing system satellite navigation satellite-independent navigation technology integration system development
Deep Space Exploration — the Future of Space Industry (2021-9-15)
周济(院士)
26 Jul 2022
Keywords： 导航与测绘
China’s Satellite Navigation Industry: Industrial Policies and Innovation Ecosystem Construction
Chen Wenbo, Zhang Luyang
Strategic Study of CAE 2023, Volume 25, Issue 2, Pages 41-49 doi: 10.15302/J-SSCAE-2023.02.005
The satellite navigation industry is an emerging industry of strategic significance, and formulating long-term, macroscopic, and systematic industrial policies is crucial for the high-quality development of the satellite navigation industry and the formation of a new industrial pattern. The innovation ecosystem theory focuses on the dynamic transition between (1) system composition and elements of the system and (2) system and environment; it can assist the transformation of current policies for China’s satellite navigation industry. Considering relevant requirements of the 14th Five-Year Plan, this study reviews policy documents regarding China’ssatellite navigation industry and analyzes the direct, radial, and systemic coupling relationships between industrial policies and other innovation subjects and subsystems using the innovation ecosystem theory model and focusing on the elements of industrial policies. This study indicates that the current policies require improvement in terms of policy systems and subsystems and are not conducive to the systematic and coupled development of the industry. Therefore, we propose the following suggestions: (1) accelerating the top-level design of legislation and systems; (2) clarifying the role of government; and (3) improving the promotion and application of policies.
Keywords： satellite navigation industry policy innovation ecosystem collaborative innovation
Current Status and Transformation of Satellite Navigation Industry Policies in China
Yang Junlin, Fang Yufei, Wang Jun, Mao Guohui
Strategic Study of CAE 2021, Volume 23, Issue 2, Pages 138-145 doi: 10.15302/J-SSCAE-2021.02.019
Satellite navigation is an emerging industry of strategic importance in China. Targeted and powerful industrial policies can help optimize and upgrade the satellite navigation industry and promote the scaled, industrialized, and international development of the BeiDou Navigation Satellite System. They can also help establish a comprehensive spatiotemporal system that is integrated, ubiquitous, and intelligent. This study focuses on the transformation of China’s satellite navigation industry policies and expounds on the role of industrial policies in the development of the satellite navigation industry. Besides, it also summarizes the current status and main problems of the industry policies at the country, industry, and region levels, and analyzes the objectives, basic ideas, and measures for the transformation of these policies. The study demonstrates that a policy system has been preliminary established for the navigation satellite industry in China. However, the legalization level of the industry policies is low; these policies are fragmented; the policy instruments have not been scientifically combined; targeted policy support is urgently required for the core technology research of the industry; and the application of international rules and standards is inadequate. To promote the high-quality development of the satellite navigation industry in China, we suggest that the legislation of the industry should be accelerated, and policy support and dominating methods for the industry should be adjusted. Moreover, comprehensive and targeted policy implementation should be promoted, the coordination mechanism should be improved, and China’s satellite navigation industry should participate in the formulation of international standards and rules.
Keywords： satellite navigation industry industrial policy transformation rules and standards BeiDou Navigation Satellite System (BDS)
Engineering Innovation and the Development of the BDS-3 Navigation Constellation
Jun Xie, Chengbin Kang
Engineering 2021, Volume 7, Issue 5, Pages 558-563 doi: 10.1016/j.eng.2021.04.002
Keywords： EngineeringAchievements
Progress and Consideration of High Precision Road Navigation Map
Liu Jingnan,Wu Hangbin,Guo Chi,Zhang Hongmin,Zuo Wenwei,Yang Cheng
Strategic Study of CAE 2018, Volume 20, Issue 2, Pages 99-105 doi: 10.15302/J-SSCAE-2018.02.015
With the rapid development of the Internet, an increasing number of new industries such as "Internet Plus" intelligent transportation and unmanned systems based on location-based services have been gradually developed. The development of these industries requires the support of high precision location data, which the 5 m accuracy of traditional navigation maps cannot provide. To overcome the drawbacks of traditional maps, high precision road navigation maps have been proposed. High precision road navigation maps can provide more detailed road information and are thus able to more accurately reflect the real situation of roads. Compared to traditional maps, high precision road navigation maps possess three advantages. First, they include additional map layers. Second, the content of the layers is finer. Third, a new map structure is divided. However, the rich information content of high precision maps leads to the generation of huge amounts of data. Traditional centralized big data processing modes are unable to meet the computing needs required for processing such huge amounts of data. Therefore, in this paper, we propose a big data processing model involving "crowdsourcing + edge computing" to address the problem of high precision map calculation. At present, high precision road navigation maps have kicked into a high gear. Nevertheless, certain problems persist that need to be addressed during the process of development.
Keywords： high precision road navigation map “Internet Plus” intelligent transportation unmanned systems crowdsourcing edge computing
Studies on Autonomous Navigation Techniques for Navigation Constellations
Shuai Ping,Qu Guangji,Chen Zhonggui
Strategic Study of CAE 2006, Volume 8, Issue 3, Pages 22-30
If the autonomous navigation techniques are applied to a navigation constellation, the number of the ground control stations, the message injecting frequency from the ground stations to satellites and system maintenance cost may be reduced significantly. Meanwhile, the integrity of navigation messages can be monitored in the real-time mode and the survivability of the navigation system also enhanced. The autonomous navigation will be gradually a main research subject for the next generation navigation satellite system. Firstly, the information processing flow of the autonomous navigation constellation is described systematically in this paper. Secondly, the key techniques to realize the autonomous navigation for the navigation constellation, including the long-term prediction of the ephemerides and clock parameters, establishment and maintenance for the cross measurement and communication links, autonomous time synchronization, autonomous ephemeris updating, robust filtering, establishment of the constellation rotation models, long-term prediction of the earth rotation and polar drift parameters, are presented as an important part of the paper. Moreover, the approaches to actualize the key techniques are analyzed and the relative mathematic models are also demonstrated in detail. Finally, the autonomous time synchronization and ephemeris updating are simulated. It is clearly shown from the simulated results that by processing the inter-satellite measurement data with the on-board Kalman filters and updating continually the clock parameters and ephemerides, the time synchronization and ephemeris updating among the satellites can be implemented autonomously and highly-accurately. Therefore, the reasonability and feasibility of the information processing flow and key technical algorithms for the autonomous navigation constellation are validated preliminarily.
Keywords： navigation constellation autonomous navigation information processing flow system simulation
Low Earth Orbiter (LEO) Navigation Augmentation: Opportunities and Challenges
Wang Lei, Li Deren, Chen Ruizhi, Fu Wenju, Shen Xin, Jiang Hao
Strategic Study of CAE 2020, Volume 22, Issue 2, Pages 144-152 doi: 10.15302/J-SSCAE-2020.02.018
As China’s Beidou satellite navigation system (Beidou system) achieves a primary global coverage, the low earth orbiter navigation augmentation (LEO-NA) technique becomes a hot research topic, since it can easily cooperate with the Beidou system to improve the precision for global autonomous navigation and to extend the application market of the global navigation satellite systems (GNSS). This paper analyzed the demand for and status of the LEO-NA technique, and focused on the in-orbit validation of key techniques for the “Luojia-1A” satellite. It also studied the challenges faced by the LEO-NA system, including interoperability of signal frequencies after navigation augmentation, integrated design of the communication and navigation signals, control and management of the LEO constellations, acquisition and tracking of the high-dynamic augmented signals, and integration with existing GNSS systems. Considering the pressing demand for the LEO-NA techniques, the following suggestions are proposed, including enhancing the top-level design of the LEO-NA system while focusing on the synergy of the LEO-NA and Beidou systems; promoting the integration of the communications, navigation, and remote sensing functions, and building the space-based real-time service system in a stepwise and stratified manner; and planning and constructing the satellite project and the ground infrastructure in an integrated manner.
Keywords： satellite navigation augmentation low earth orbiter constellation Beidou system collaborative development satellite–ground integration
Two Ways Pseudo Range Time Synchronization for Navigation Satellite Clock
Tan Shusen
Strategic Study of CAE 2006, Volume 8, Issue 12, Pages 70-74
Aiming at the demand of time synchronization, the navigation satellite two-way clock pseudo range time synchronization was presented and the application of four basic synchronic ways were analysed in this paper. Comparing with other navigation satellite clock synchronization ways, this way was provided with advantages such as high precision, simplicity and light burden to equipment on satellite and so on. In the first section of the paper the meaning and status of time synchronization of navigation satellite clock were discussed. The error of the navigation satellite clock synchronization affects users' position and precision directly. In the second section two way pseudo range time synchronization theory was introduced, that is to get time error between two stations that is satisfied with the condition △tAB =-tBr-tAr. tAr and tBr are the time of A and B station( or satellite) that receives another station ( or satellite)'s transmitting signal. The difference between them is clock bias. In the third sections pseudo range time synchronization ways introduced. In the fourth, fifth and sixth section of the paper, two way radio pseudo range(TWRPr), two way laser pseudo range(TWLPr) ,two way satellite-relay pseudo range (TWSrPr), and two way earth-relay pseudo range ( TWErP) were analyzed respectively. TWRPr way was provided and RMS = 0.42 ns. TWSrPr three stations time synchronization result was RMS =1.75 ns. In the eighth section the precision that two ways pseudo range time synchronization can reach was summed up, that is TWRPr can reach 1.0 ns. The repeated precision of TWLPr can reach 0.1 ns, and can be used to evaluate the capability of atomic clock and validate the precision of other synchronization method.
Keywords： navigation satellite pseudo range time synchronization
The Largest Market for Civil Use of GPS ——Car Navigation System
Zhao Huiping
Strategic Study of CAE 2001, Volume 3, Issue 8, Pages 64-69
According to the principle of positioning a new car navigation system of triple accuracy which consists of GPS navigation,adaptive navigation and mpa matching is presented in this paper. At present, the most wide civilian application of the GPS is the car navigation system. It is a high technique method to solve traffic jam. It is a communication and transportation management mode in the 21st century. It is the intelligent transporation system (ITS).
Keywords： GPS car navigation intelligent transportation system (ITS)
Adaptive network fuzzy inference system based navigation controller for mobile robot Research Article
Panati SUBBASH, Kil To CHONG
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 2, Pages 141-151 doi: 10.1631/FITEE.1700206
Autonomous navigation of a mobile robot in an unknown environment with highly cluttered obstacles is a fundamental issue in mobile robotics research. We propose an adaptive network fuzzy inference system (ANFIS) based navigation controller for a differential drive mobile robot in an unknown environment with cluttered obstacles. Ultrasonic sensors are used to capture the environmental information around the mobile robot. A training data set required to train the ANFIS controller has been obtained by designing a fuzzy logic based navigation controller. Additive white Gaussian noise has been added to the sensor readings and fed to the trained ANFIS controller during mobile robot navigation, to account for the effect of environmental noise on sensor readings. The robustness of the proposed navigation controller has been evaluated by navigating the mobile robot in three different environments. The performance of the proposed controller has been verified by comparing the travelled path length/efficiency and bending energy obtained by the proposed method with reference mobile robot navigation controllers, such as neural network, fuzzy logic, and ANFIS. Simulation results presented in this paper show that the proposed controller has better performance compared with reference controllers and can successfully navigate in different environments without any collision with obstacles.
Keywords： Adaptive network fuzzy inference system Additive white Gaussian noise Autonomous navigation Mobile robot
Modernized Governance for the Construction of China’s Satellite Navigation System
Yang Junlin, Yang Changfeng, Mao Guohui
Strategic Study of CAE 2023, Volume 25, Issue 2, Pages 31-40 doi: 10.15302/J-SSCAE-2023.02.004
The construction of satellite navigation is characterized by a long risk chain, multiple related industries, various participants, multiple interests, and difference in domestic and foreign characteristics; therefore, its governance is strongly systematic and highly complex. In the context of promoting the modernization of China’s national governance system and capacities, the satellite navigation industry needs to actively explore a modernized governance system and development mode to improve its governance quality and efficiency and ensure its sustainable development. Considering multiple levels such as history vs. reality and theory vs. practice, this study summarizes the governance experience in the practice of the three-step development strategy of China’s satellite navigation system and analyzes the major challenges it faces in the new development stage. Moreover, the development goals and the factors to be coordinated for the modernized governance are proposed. Furthermore, we suggest that efforts should be focused on improving the leadership, management, legal, application, innovation, strategic talent cultivating, and internationalization systems. This can promote the modernized governance of satellite navigation construction and provide strong support for the high-quality development of China’s satellite navigation system.
Keywords： BeiDou navigation satellite system management effectiveness scientific and technological innovation guaranteed by the rule of law
Welcome to the Global Navigation Multi-Constellation
Peter Weiss
Engineering 2021, Volume 7, Issue 4, Pages 421-423 doi: 10.1016/j.eng.2021.03.006
Studies on Precise Spacecraft Navigation and Positioning Using GPS
Xiang Kaiheng,Qu Guangji
Strategic Study of CAE 2004, Volume 6, Issue 1, Pages 86-91
In this paper, GPS measurement technology, Encke method to solve satellite orbit perturbation and generalized Kalman filtering technology are organically combined together, and an innovative solution— carrier phase & pseudorange integrated dynamic orbit determination (CPPIDOD) for low earth orbit spacecraft on-board autonomous precise navigation and positioning using GPS is presented. Difficult problems of dynamically resolving of integer ambiguities and amendment of cycle slips in the application of GPS carrier phase have been solved. Based on all these, technique of carrier phase & pseudorange integrated dynamic differential relative navigation between two spacecrafts is brought forward. Results of numerical simulation analyses and semi-physical simulation tests show that the solutions presented in this paper are feasible. They can significantly improve the performance of GPS positioning, and their models, algorithms and software are practical for engineering use.
Keywords： spacecraft navigation GPS carrier phase Kalman filtering
Title Author Date Type Operation
Integrated Development of Satellite and Satellite-Independent Navigation Technologies from the Perspective of PNT System
Guo Shuren, Jiang Kun, Li Xing, Liu Gang, Li Ping, Li Linze, Guo Siyuan
Journal Article
Deep Space Exploration — the Future of Space Industry (2021-9-15)
周济(院士)
26 Jul 2022
Conference Videos
China’s Satellite Navigation Industry: Industrial Policies and Innovation Ecosystem Construction
Chen Wenbo, Zhang Luyang
Journal Article
Fan Bangkui: Low Altitude Network and UAV (2019-10-13)
樊邦奎(院士)
20 Jan 2021
Conference Videos
Current Status and Transformation of Satellite Navigation Industry Policies in China
Yang Junlin, Fang Yufei, Wang Jun, Mao Guohui
Journal Article
Engineering Innovation and the Development of the BDS-3 Navigation Constellation
Jun Xie, Chengbin Kang
Journal Article
Progress and Consideration of High Precision Road Navigation Map
Liu Jingnan,Wu Hangbin,Guo Chi,Zhang Hongmin,Zuo Wenwei,Yang Cheng
Journal Article
Studies on Autonomous Navigation Techniques for Navigation Constellations
Shuai Ping,Qu Guangji,Chen Zhonggui
Journal Article
Low Earth Orbiter (LEO) Navigation Augmentation: Opportunities and Challenges
Wang Lei, Li Deren, Chen Ruizhi, Fu Wenju, Shen Xin, Jiang Hao
Journal Article
Two Ways Pseudo Range Time Synchronization for Navigation Satellite Clock
Tan Shusen
Journal Article
Adaptive network fuzzy inference system based navigation controller for mobile robot
Panati SUBBASH, Kil To CHONG
Journal Article
Modernized Governance for the Construction of China’s Satellite Navigation System
Yang Junlin, Yang Changfeng, Mao Guohui
Journal Article
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