GB/T 42578-2023 English PDF

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GB/T 42578-2023: BeiDou subdivision time code
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42578-2023	459	Add to Cart	4 days	BeiDou subdivision time code	Valid

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Basic data

Standard ID: GB/T 42578-2023 (GB/T42578-2023)
Description (Translated English): BeiDou subdivision time code
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: V70
Classification of International Standard: 33.070.40
Word Count Estimation: 24,287
Date of Issue: 2023-05-23
Date of Implementation: 2023-05-23
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42578-2023: BeiDou subdivision time code

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS33:070:40 CCSV70 National Standards of People's Republic of China Beidou split time code Released on 2023-05-23 2023-05-23 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Abbreviations 2 5 General requirements 2 5:1 Time and Calendar System 2 5:2 Classification and form of Beidou split time code 2 5:3 Positioning of time intervals 2 6 Beidou split time code structure 2 6:1 Conventions of bit numbers 2 6:2 Structural Composition 3 6:3 Time frame 3 7 Input of date and time information 3 7:1 Date and time information input for universal time recording 3 7:2 Time information input for precision time recording 4 7:3 Description of Beidou subdivision time code date and time information input 5 8 Coding method of Beidou split time code 5 8:1 Identification domain P and multi-granularity time domain T of general-purpose time-recording BTC 5 8:2 Identification domain P and multi-granularity time domain T of precise time recording BTC 7 8:3 BTC's Time Interval Field S 9 9 Conversion of Beidou split time code to date and time information 9 Appendix A (informative) The subdivision concept of Beidou subdivision time code formation 11 Appendix B (informative) Beidou split time code encoding example 13 B:1 Conversion example of date and time information to Beidou split time code 13 B:2 Conversion example of Beidou split time code to date and time information14 Reference 16

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 contents of this document may refer to patents: The issuing agency of this document assumes no 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: Peking University, Beidou Fuxi Zhongke Digital Hefei Co:, Ltd:, Chinese People's Liberation Army Strategic Support Force Information Engineering University, Beijing Xuanji Fuxi Big Data Technology Co:, Ltd: The main drafters of this document: Cheng Chengqi, Tong Xiaochong, Huang Qiaohua, Qu Tengteng, Zhou Xiang, Pu Guoliang, Lei Yi, Wu Xuemin:

Introduction

The Beidou subdivision time code is a time segment expression code that uses a binary tree structure to divide the time axis: It is a useful supplement to , and has the consistency of time/period identification: As an important national space information infrastructure, the Beidou satellite navigation system is The most important means of collecting time information in the national spatio-temporal big data system, the Beidou subdivided time code is used as the representative of the Beidou satellite navigation system: It is a basic output of the positioning, navigation and timing (PNT) system, which assigns values to the time period of everything, and the purpose is to implement at the forefront of the information chain: The unified identification and expression of the current time period can quickly form the correlation system of time data in the whole information chain, so as to provide various applications under the condition of big data: Provide better and more convenient time information basic services: The Beidou subdivision time code is used in conjunction with the Beidou grid position code to further improve the time The organization, processing, analysis, transmission and utilization efficiency of empty big data: Beidou split time code

1 Scope

This document specifies the time granularity selection and encoding rules for Beidou split time code: This document is applicable to the representation of the terminal time information of the Beidou satellite navigation system, as well as the representation of various date and time information based on this:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document: GB/T 39355-2020 Spatial data and information transmission system time code format (ISO 11104:2011, MOD)

3 Terms and Definitions

The following terms and definitions defined in GB/T 39355-2020 apply to this document: 3:1 time-point A time instant whose length is assumed to be zero: [Source: GB/T 7408-2005,3:26] 3:2 time scale timescale a) A system for ordering events without ambiguity: b) Choose a base unit of time (seconds), accumulated from a specific starting point: The dots on the time scale represent the time: year, month, day, Hours, minutes, seconds, and fractional seconds: [Source: GB/T 39355-2020, 3:2] 3:3 time interval timeinterval a) The duration between two instants on the same time scale: b) The difference between two points on a time scale or the time elapsed between two events: [Source: GB/T 39355-2020, 3:3] 3:4 Time granularity timegranularity time resolution timeresolution The smallest time interval that can be resolved on the time axis: 3:5 single-granularity timecode single-granularitytimecode Code that describes time interval information with only minimal time granularity: ......

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