Search result: GB/T 45446-2025
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Interface specification for signal in space of BeiDou navigation satellite system precise point positioning service
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GB/T 45446-2025
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| Standard ID | GB/T 45446-2025 (GB/T45446-2025) | | Description (Translated English) | Interface specification for signal in space of BeiDou navigation satellite system precise point positioning service | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | V04 | | Classification of International Standard | 49.020 | | Word Count Estimation | 38,341 | | Date of Issue | 2025-03-28 | | Date of Implementation | 2025-03-28 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
GB/T 45446-2025.Beidou Satellite Navigation System Precise Point Positioning Service Space Signal Interface Specification
GB/T 45446-2025 English version. Interface specification for signal in space of BeiDou navigation satellite system precise point positioning service
ICS 49.020
CCSV04
National Standard of the People's Republic of China
Beidou satellite navigation system precise point positioning service space
Signal interface specifications
Released on 2025-03-28
2025-03-28 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Range 1
2 Normative references 1
3 Terms and Definitions 1
4 Abbreviations 1
5 Overview of BeiDou Satellite Navigation System 2
5.1 Space Constellation 2
5.2 Coordinate system 2
5.3 Time system 3
6 Signal characteristics 3
6.1 Signal Structure 3
6.2 Signal Modulation 3
6.3 Logic Level 4
6.4 Polarization 4
6.5 Carrier Phase Noise 4
6.6 Spurious 4
6.7 Correlation loss 4
6.8 Data/Code Consistency 4
6.9 Signal Consistency 4
6.10 Ground receiving power level 4
7 Ranging Code Characteristics 5
8 Navigation message 6
8.1 Information Format 6
8.2 Information Content 9
8.3 Information validity period 23
8.4 PPP-B2b Information Enhancement Object 23
8.5 Time-Space Coordinate System 23
8.6 Satellite code bias correction 23
8.7 Satellite Orbit Correction 24
8.8 Satellite clock correction 24
8.9 User distance measurement accuracy 24
8.10 System time calculation 24
Appendix A (Informative) Multi-binary LDPC encoding and decoding method and examples 25
A.1 Multi-level LDPC coding 25
A.2 Multi-ary LDPC decoding 26
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the Equipment Development Department of the Central Military Commission.
This document is under the jurisdiction of the National Beidou Satellite Navigation Standardization Technical Committee (SAC/TC544).
This document was drafted by. China Satellite Navigation Engineering Center, China Satellite Navigation System Management Office, Beijing Satellite Navigation Center, China
Institute of Aerospace Standardization, Wuhan University, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Huazhong University of Science and Technology, and Beijing Institute of Telemetry Technology.
The main drafters of this document are. Gao Weiguang, Su Chengeng, Chen Liang, Guo Shuren, Wang Chenglong, Lu Yun, Li Xing, Gao Yang, Lou Yidong, Song Weiwei,
Tang Chengpan, Tang Zuping, Gao Lifeng, Zheng Fu, Wang Weijia, Chen Ying, Li Gang, Zhou Wei, Yang Xiaoheng, Chen Zhengkun, Su Mudan, Zhu Zhiyong, Sun Weibin.
introduction
The BeiDou satellite navigation system is divided into three stages of construction and development. BeiDou-1, BeiDou-2 and BeiDou-3.The BeiDou-3 system provides multiple
The company provides a variety of services, including. providing global positioning, navigation and timing (RNSS), global short message communication (GSMC) and international search and rescue (SAR)
Services. Provide precise point positioning (PPP), satellite-based augmentation (SBAS), ground-based augmentation (GAS) and regional short message in China and surrounding areas
Communication (RSMC) service. Among them, the BeiDou-3 system PPP service is provided through the PPP-B2b of the BeiDou-3 geostationary orbit (GEO) satellite.
Signal provision, PPP-B2b signal is used as a data broadcast channel to broadcast the BeiDou-3 system and other global satellite navigation systems (GNSS) precision
Satellite orbit and clock correction parameters are used to provide PPP services to users in China and surrounding areas.
This document is a technical document issued by the China Satellite Navigation System Management Office, "Beidou Satellite Navigation System Space Signal Interface Control Document"
It is compiled based on the Precision Point Positioning Service Signal PPP-B2b (Version 1.0) of the BeiDou-3 system, which mainly defines the PPP service space of the BeiDou-3 system.
Signal PPP-B2b related content, including space signal characteristics, ranging code characteristics, navigation message structure, navigation message parameters and user algorithm
The formulation and implementation of this document will provide reference and guidance for the development, production and inspection of satellite navigation products using PPP-B2b signals.
Guiding effect.
Beidou satellite navigation system precise point positioning service space
Signal interface specifications
1 Scope
This document specifies the signal characteristics, ranging code characteristics,
Navigation message structure and user algorithm.
This document applies to the development, production and inspection of satellite navigation products using PPP-B2b signals.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 39267 Beidou Satellite Navigation Terminology
3 Terms and definitions
The terms and definitions defined in GB/T 39267 apply to this document.
4 Abbreviations
The following abbreviations apply to this document.
BDCS. BeiDou Coordinate System
BDS. BeiDou Navigation Satellite System
BDT. Beidou Time (BDSTime)
BPSK. Binary Phase Shift Keying
CGCS2000.2000 China Geodetic Coordinate System (ChinaGeodeticCoordinateSystem2000)
CRC. Cyclic Redundancy Check
DCB. Differential Code Biases
GALILEO.Galileo satellite navigation system
GEO. Geostationary Earth Orbit
GF. Galois Field
GLONASS. Global Navigation Satellite System
GNSS. Global Navigation Satellite System
GPS. Global Positioning System
IERS. International Earth Rotation and Reference Systems Service
IGSO. Inclined GeoSynchronous Orbit
IOD. Issue of Data
IODC. Issue of Data Clock
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