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Based on the design theory and development experience of Beidou navigation satellite system (BDS), this book highlights the space segment and the related satellite technologies as well as satellite-ground integration design from the perspective of engineering. The satellite navigation technology in this book is divided into uplink and reception technology, broadcasting link technology, inter-satellite link technology, time-frequency system technology, navigation signal generation and assessment technology, navigation information management technology, autonomous operation technology of navigation satellite. In closing, the book introduces readers to the technological development status and trend of BDS and other GNSS, and propose the technologies of future development.
Unlike most current books on this topic, which largely concentrate on principles, receiver design or applications, the book also features substantial information on the role of satellite system in the GNSS and the process of signal information flow, and each chapter not only studies on the theoretical function and main technologies, but also focuses on engineering development. Accordingly, readers will gain not only a better understanding of navigation satellite systems as a whole, but also of their main components and key technologies.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Introduction

Abstract
The Chinese phrase “Yu” and “Zhou” (the Universe) first appeared in the ancient Chinese book Zhuangzi. “Yu” stands for the three-dimensional position in the space, and “Zhou” represents information about time. They all can be put into the category of navigation.
Jun Xie, Haihong Wang, Peng Li, Yansong Meng

Chapter 2. Overview of Navigation Satellite Systems

Abstract
The navigation satellite system is a space-earth integrated system where the satellite transmits the radio navigation signals and provides the PNT services to various users. In 1957, the Soviet Union successfully launched the first artificial earth satellite. In 1958, the United States began to develop the “Transit” navigation satellite system. Undergoing nearly 60 years of development, navigation satellite systems, including Global Navigation Satellite System (GNSS) and Regional Navigation Satellite System (RNSS), have become the important space infrastructure that people rely on.
Jun Xie, Haihong Wang, Peng Li, Yansong Meng

Chapter 3. Satellite Navigation Uplink and Reception Technology

Abstract
Uplink is critical for a satellite navigation system as an important means for the ground segment to upload the information. The uplink channels include a remote control channel for satellite TT&C and satellite operation management, as well as an information upload channel, for managing and controlling the spaceborne payload. The technology of TT&C channel in the navigation satellite system is similar to that in a conventional satellite system, and therefore, will not be elaborated on in this book.
Jun Xie, Haihong Wang, Peng Li, Yansong Meng

Chapter 4. Satellite Navigation Broadcasting Link Technology

Abstract
In the satellite navigation, the broadcasting link is a physical channel for navigation satellite to broadcast the navigation signals to the user so as to realize the positioning and timing. Satellite navigation is to determine the user’s position with the radio positioning method by receiving radio signal from a navigation satellite to measure the distance between the user and the navigation satellite in the principle of Time of Arrival (ToA) ranging.
Jun Xie, Haihong Wang, Peng Li, Yansong Meng

Chapter 5. Satellite Navigation Inter-satellite Link Technology

Abstract
Inter-satellite link (or Crosslink) refers to the link between satellites, or the link between spacecraft in a more generalized sense. Its main functions include inter-satellite communication, data transmission, inter-satellite ranging, and inter-satellite TT&C.
Jun Xie, Haihong Wang, Peng Li, Yansong Meng

Chapter 6. Time-Frequency System for Satellite Navigation

Abstract
As the core of a navigation satellite system, the time–frequency system directly determines the accuracy of satellite navigation timing. The work of this system mainly includes the establishment of system time, the generation and maintenance of satellite time, the intra-system time synchronization, the tracing of system time, the monitoring and prediction of GNSS time offset, and other work.
Jun Xie, Haihong Wang, Peng Li, Yansong Meng

Chapter 7. Generation and Assessment of Navigation Signal

Abstract
Navigation signal quality has a great influence on the performance indicators of a navigation system including positioning, velocity measurement, timing accuracy, compatibility and interoperability, confidentiality, and anti-jamming capability.
Jun Xie, Haihong Wang, Peng Li, Yansong Meng

Chapter 8. Satellite Navigation Information Management

Abstract
The satellite navigation system controls the satellite constellation in the space segment through the measurement of the ground segment, and regularly uploads the navigation information to satellites. Then the satellites process the system information, the information uploaded by the ground segment and the information of the satellites themselves according to the design requirements, and configure such information into the navigation messages to be broadcasted to users, so as to complete the satellite control and status monitoring. The Global Navigation Satellite System (GNSS) has diverse information interfaces between satellite and ground station and between satellites, with various types of information from a lot of sources in complex path relationships. Numerous information exchanges happen among multiple satellite-ground systems, among multiple ground stations, among multiple satellites, and among multiple onboard equipment.
Jun Xie, Haihong Wang, Peng Li, Yansong Meng

Chapter 9. Autonomous Operation Technology of Navigation Satellites

Abstract
A Navigation Satellite System (NSS) consists of several satellites in space. The TT&C and service management of satellites relying solely on ground TT&C and operation control will bear a heavy load of data transmission and processing, and will be limited by the continuous visibility of satellites to ground stations. Excessive reliance on the TT&C and operation management of ground stations will make the safety and serviceability of NSS in wartime a worry. Therefore, improving the autonomous management function and level of navigation constellation and satellites is of great significance to relieve the operation management pressure of ground stations and enhance the stability and safety of the whole system.
Jun Xie, Haihong Wang, Peng Li, Yansong Meng

Chapter 10. Development and Prospect of Satellite Navigation Technology

Abstract
Nowadays, satellite navigation system plays a more and more important role in the transportation, surveying and mapping, telecommunications, water conservancy, finance, electric power, exploration, modern agriculture, national security, and other fields. With the increase of satellite navigation application in terms of both breadth and depth
Jun Xie, Haihong Wang, Peng Li, Yansong Meng

Backmatter

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