GB/T 39414.1-2020Interface specification for signal in space of Beidou navigation satellite system—Part 1: Open service signal B1C (English PDF)
北斗卫星导航系统空间信号接口规范 第1部分：公开服务信号B1C
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
November 19, 2020
Implementation date
June 1, 2021
Scope
GB/T 39414.1-2020 is the English-translated version of 北斗卫星导航系统空间信号接口规范 第1部分：公开服务信号B1C.
GB/T 39414.1-2020 is the Chinese standard "Interface specification for signal in space of Beidou navigation satellite system—Part 1: Open service signal B1C".
Its scope clause reads: This part of GB/T 39414 specifies the communication between the Beidou satellite navigation system (hereinafter referred to as the Beidou system) space constellation and the user terminal.
Open service signal B1C signal characteristics, navigation message structure and user algorithm, etc. This section applies to the development, production and inspection of satellite navigation products using B1C signals. Its clauses include terms and definitions, abbreviations.
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Document preview — GB/T 39414.1-2020
National Standard of the People's Republic of China
- ICS
- 49.020
- Classification
- V 04
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions, abbreviations
- 3.1 Terms and definitions
- 3.2 Abbreviations
- 4 Overview of Beidou system
- 4.1 Space Constellation
- 4.2 Coordinate System
- 4.3 Time System
- 5 Signal characteristics
- 5.1 Signal structure
- 5.2 Signal Modulation
- 5.3 Level mapping
- 5.4 Polarization mode
- 5.5 Carrier phase noise
- 5.6 Spurious
- 5.7 Related losses
- 5.8 Data/code consistency
- 5.9 Signal consistency
- 5.10 Ground received power level
- 6 Ranging code characteristics
- 6.1 Ranging code structure
- 6.2 B1C signal ranging code
- 7 Navigation message structure
- 7.1 Overview of navigation messages
- 7.2 B-CNAV1 navigation message
- 8 Navigation message parameters and algorithms
- 8.1 Ranging code number
- 8.2 Page Type
- 8.3 System time parameters
- 8.4 Text data version identification
- 8.5 Clock difference parameters
- 8.6 Group delay correction parameter
- 8.7 Ephemeris parameters
- 8.8 Ionospheric delay correction model parameters
- 8.9 Medium precision almanac
- 8.10 Simple Almanac
- 8.11 Earth orientation parameters
- 8.12 BDT-UTC time synchronization parameters
- 8.13 BGTO parameters
- 8.14 Satellite health status
- 8.15 Satellite integrity status indicator
- 8.16 Spatial signal accuracy index
- 8.17 Spatial signal monitoring accuracy index
- 9 Compliance verification method
- 9.1 Overview
- 9.2 Signal characteristics verification method
- 9.3 Method for verifying the characteristics of the ranging code
- 9.4 Verification method of navigation message structure
- 9.5 Verification method of navigation message parameter algorithm
- Appendix A (informative appendix) Multi-ary LDPC encoding and decoding methods and examples
1 Scope
This part of GB/T 39414 specifies the communication between the Beidou satellite navigation system (hereinafter referred to as the Beidou system) space constellation and the user terminal.
Open service signal B1C signal characteristics, navigation message structure and user algorithm, etc.
This section applies to the development, production and inspection of satellite navigation products using B1C signals.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 39267 Beidou satellite navigation terminology
3 Terms and definitions, abbreviations
3.1 Terms and definitions
The terms and definitions defined in GB/T 39267 apply to this document.
3.2 Abbreviations
The following abbreviations apply to this document.
AIF. System Alarm Identification
BDCS. Beidou Coordinate System
BDGIM. Beidou Global Ionospheric Delay Correction Model […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 41 pages — is available in the English PDF.
Referenced standards
Cited by
- GB/T 45435-2025Technical requirements and test methods of BeiDou airborne equipment for aviation supplemental navigation
- GB/T 44175.1-2024Real-time service of international GNSS monitoring and assessment system (iGMAS) - Part 1: Data stream format
- GB/T 42579-2023BeiDou navigation satellite system time
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Related Standards
GB/T 39414.2-2020 — Interface specification for signal in space of BeiDou navigation satellite system—Part 2: Open service signal B2a
GB/T 39414.3-2020 — Interface specification for signal in space of BeiDou navigation satellite system—Part 3: Open service signal B1I
GB/T 39414.4-2020 — Interface specification for signal in space of BeiDou navigation satellite system—Part 4: Open service signal B3I
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