GB/T 39787-2021Coordinate system of BeiDou navigation satellite system (English PDF)
北斗卫星导航系统坐标系
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
March 9, 2021
Implementation date
October 1, 2021
Scope
GB/T 39787-2021 is the English-translated version of 北斗卫星导航系统坐标系.
GB/T 39787-2021 fixes the coordinate system of the BeiDou navigation satellite system. It sets the definition of that system, its realisation, its maintenance and the requirements for updating it, and gives the methods for transforming between it and the other geocentric coordinate systems.
It applies to the construction, operation and use of BeiDou. Surveying institutes, receiver makers and the system operator use it. Issued on 9 March 2021, it has applied since 1 October 2021.
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Document preview — GB/T 39787-2021
National Standard of the People's Republic of China
- ICS
- 07.040
- Classification
- A 75
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and abbreviations
- 3.1 Terms and definitions
- 3.2 Abbreviations
- 4 Coordinate system definition
- 4.1 Origin, scale and orientation
- 4.2 Reference ellipsoid
- 4.2.1 General provisions
- 4.2.2 Define Constant
- 4.2.3 Special application constant
- 4.2.4 Other constants
- 4.3 Related main models and parameters
- 5 Beidou coordinate system realization requirements
- 5.1 General Concept
- 5.2 Requirements for Beidou Reference Station
- 5.3 Beidou Observation Data Requirements
- 5.4 Data processing requirements
- 6 Beidou reference frame maintenance and update requirements
- 6.1 Requirements for the maintenance of the Beidou reference frame
- 6.1.1 General Concept
- 6.1.2 Maintenance requirements
- 6.2 Beidou reference frame update requirements
- 6.2.1 General Concept
- 6.2.2 Update requirements
- 7 Coordinate conversion
- 7.1 Conversion type
- 7.2 Conversion model and requirements
- 7.3 Common point selection
- Appendix A (normative) Derived geometric constant formula
- Appendix B (normative) Derived physical constant formula
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.
1 Scope
This document specifies the definition, implementation, maintenance and update requirements of the Beidou satellite navigation system coordinate system, as well as the Beidou satellite navigation system Coordinate system and other geocentric coordinate system conversion method.
This document is applicable to the construction, operation and application of Beidou satellite navigation system.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 39267-2020 Beidou satellite navigation terminology
3 Terms, definitions and abbreviations
3.1 Terms and definitions 1
The following terms and definitions defined in GB/T 39267-2020 apply to this document.
3.1.1 International terrestrial reference frame; ITRF
The coordinates and velocities of a set of global geodetic observation stations used to realize the International Earth Reference System.
3.1.2 Reference ellipsoid
The size and shape are defined by the semi-major axis of the equator and the oblateness, which represents the spheroid of the earth and is positioned and oriented.
3.1.3 Earth's gravityfield
A collection of earth position, gravity, geoid (or similar geoid), vertical deviation, etc.
3.1.4 2000 China geodetic coordinate system Chinageodeticcoordinatesystem2000; CGCS2000
The geodetic coordinate system established by China. The origin of its coordinate system is at the center of mass of the earth, and the Z axis points to the International Earth Rotation Service (IERS)
The defined reference pole (IRP) direction, the X axis is the reference meridian (IRM) defined by IERS and the equatorial plane that passes through the origin and is orthogonal to the Z axis The Y-axis meets the right-hand rule. [Source: GB/T 39267-2020, 2.2.5]
3.1.5 BeiDou coordinate system; BDCS
Beidou satellite navigation system coordinate system coordinatesystemofBeiDounavigationsatelitesystem The geodetic coordinate system adopted by the Beidou Satellite Navigation System (BDS). The definition of BDCS complies with the International Earth Rotation Service (IERS) specification, Consistent with the definition of CGCS2000. [Source: GB/T 39267-2020, 2.2.6, with modification]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 20 pages — is available in the English PDF.
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