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GB/T 45526-2025Specification for corrections product of BDS/global navigation satellite system (GNSS) precise point positioning real-time kinematic state space representation (English PDF)

北斗/全球卫星导航系统（GNSS）实时动态精密单点定位状态域改正产品规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

April 25, 2025

Implementation date

April 25, 2025

Scope

GB/T 45526-2025 is the English-translated version of 北斗/全球卫星导航系统（GNSS）实时动态精密单点定位状态域改正产品规范.

GB/T 45526-2025 is the Chinese national standard covering the correction stream a single receiver needs to fix its ambiguities in real time — the orbit and clock corrections, the user ranging accuracy, the code and phase biases, the ionospheric and tropospheric delays which are the part of the error that depends on where the user is standing, the accuracy required of each product, the test methods, and the state space algorithm model behind them. First edition, under the Equipment Development Department of the Central Military Commission. In force from 25 April 2025. Issued on 25 April 2025, it has been in force since 25 April 2025.

Document preview — GB/T 45526-2025

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

PrefaceIII
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 Abbreviations1
5 Information Content2
5.1 Information content structure2
5.2 Orbit correction information8
5.3 Clock Correction Information9
5.4 User ranging accuracy information10
5.5 Code deviation correction information11
5.6 Phase deviation correction factor12
5.7 Ionospheric delay correction information13
5.8 Tropospheric delay correction information20
6 Accuracy requirements26
6.1 Orbital Correction Accuracy Requirements2626
6.2 Accuracy requirements for clock corrections26
6.3 Space signal user ranging error accuracy requirements26
6.4 Code deviation correction number accuracy requirements27
6.5 Phase deviation correction accuracy requirements27
6.6 Accuracy requirements for ionospheric delay corrections27
6.7 Accuracy requirements for tropospheric delay corrections28
6.8 PPP-RTK positioning performance requirements28
7 Test Methods28
7.1 Calculation of orbit correction accuracy28
7.2 Calculation of the accuracy of clock corrections29
7.3 Calculation of Space Signal User Ranging Error Accuracy29
7.4 Calculation of code deviation correction accuracy30
7.5 Calculation of Phase Deviation Correction Accuracy30
7.6 Calculation of the accuracy of ionospheric delay corrections31
7.7 Calculation of the accuracy of tropospheric delay corrections31
7.8 PPP-RTK positioning performance test method32
Appendix A (Normative) Algorithm Model34
A.1 State Space Representation34
A.2 State Domain Correction Calculation34
A.3 Application42

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 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: Institute of Space Information Innovation, Chinese Academy of Sciences, Shanghai Jiaotong University, Wuhan University, China Satellite Navigation Engineering Center Center, Qilu Aerospace Information Research Institute, China Satellite Navigation System Management Office, Zhejiang Spacetime Daoyu Technology Co., Ltd., Beijing Beidouxing Navigation Navigation Technology Co., Ltd., Qianxun Location Network Co., Ltd., Shanghai Huace Navigation Technology Co., Ltd., Shanghai Sinan Navigation Technology Co., Ltd.

Co., Ltd., China Space-Time Information Group Co., Ltd., Institute of Precision Measurement Science and Technology Innovation of the Chinese Academy of Sciences, Harbin Engineering University Zhejiang University of Science and Technology, Southeast University, China Telecom Satellite Communications Co., Ltd., Beidou Application Development Research Institute, China Mobile Intelligent Driving Network Technology Co., Ltd.

Technology Co., Ltd. and Smart City Research Institute of China Unicom.

The main drafters of this document are: Li Zishen, Wang Ningbo, Li Jianwen, Wang Liang, Liu Bingcheng, Xiang Yan, Hu Zhigang, Liu Ying, Jiao Wenhai, Wang Chenglong, Hou Furong, Wang Liangliang, Zhao Wen, Wang Jian, Ji Guofeng, Wan Lihua, Su Hong, Li Xiao, Yuan Yunbin, Liu Teng, Li Liang, Pan Shuguo, Wang Chenxu, Meng Qingbo, Wang Zhiyu, Li Ang, Chen Hao, Lü Zhen, Li Yang, Wang Shengzhe, Yu Qi, Wang Liuqi, Wei Kai, Li Pu, Liu Ang, Zhang Jing, Zhao Jiajia, Kang Ning, Hou Jie, Jiang Xin, Sainan Yang, Bo Gu, Shan Yang, Chenfeng Jing, Songchuan Liu.

BeiDou/Global Navigation Satellite System (GNSS) real-time Specifications for dynamic precise point positioning state domain correction products

1 Scope

This document specifies the information content, accuracy requirements, and other requirements of the BeiDou/Global Navigation Satellite System real-time dynamic precise point positioning status domain correction products. The test method is described.

This document is applicable to the Beidou/global satellite navigation system real-time precise dynamic positioning, precise time and frequency transmission and other spatiotemporal information enhancement services.

The generation, dissemination and use of state domain correction information.

2 Normative references

GB/T 39267

GB/T 44175.1-2024

GB/T 44175.2-2024

3 Terms and definitions

The terms and definitions defined in GB/T 39267 and the following apply to this document.

3.1 State space representation

State-space characterization of error sources in satellite navigation precision positioning.

Note. The error sources are decomposed into independent error vectors such as satellite orbit, satellite clock error, code bias, phase bias, ionospheric delay and tropospheric delay.

3.2 Observation Space Expression

Observation space of error source characteristics in satellite navigation precision positioning.

NOTE. The error sources are characterized as common-mode errors in the pseudorange and carrier phase observations.

3.3

The satellite navigation receiver terminal corrects the information in the state domain (including satellite orbit, satellite clock error, code deviation, phase deviation, ionospheric delay, etc.) delay, tropospheric delay, etc.), to achieve a real-time positioning method in which the ambiguity of the user terminal is quickly fixed.

4 Abbreviations

The following abbreviations apply to this document.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 34 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 45526

Edition	Title	Revision	Status
GB/T 45526-2025	Specification for corrections product of BDS/global navigation satellite system(GNSS) precise point positioning real-time kinematic state space representation	current edition	Current

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