GB/T 39397.1-2020 in English
VALIDFile format of international GNSS monitoring and assessment system (iGMAS)—Part 1:Observation data
- Issued on:2020-11-19
- Implemented on:2021-06-01
- File Format:PDF
- Delivery:Via email within 5 business days
$301.00
| Standard No: | GB/T 39397.1-2020 |
| Document status: | VALID |
| Title in English: | File format of international GNSS monitoring and assessment system (iGMAS)—Part 1:Observation data |
| Title in Chinese: | 全球连续监测评估系统（iGMAS）文件格式 第1部分：观测数据 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2020-11-19 |
| Implemented on: | 2021-06-01 |
| ICS Classification: | 49.020-Aircraft and space vehicles in general |
| Chinese Classification: | V04-Basic standards and general methods |
| Professional Classification: | GB-National Standard |
| Related Topics: | data observation
continuous monitoring ims global data evaluation system Ruiyi Continuous Monitoring System Evaluation system data observation prn Global Monitoring System view as monitoring global monitoring GB/T 39397.1 GB/T 39397.1-2020 worldwide |
《GB/T 39397.1-2020全球连续监测评估系统（iGMAS）文件格式 第1部分：观测数据》由TC544（全国北斗卫星导航标准化技术委员会）归口，主管部门为中央军委装备发展部。
Introduction
Standard Framework and Technology Evolution
GB/T 39397.1-2020, as the supporting standard of the BeiDou-3 global system, systematically standardizes the observation data file format of the iGMAS tracking station for the first time. This standard inherits the RINEX format of GB/T 27606-2011, and adds special data fields such as BDS integrity information and ionospheric grid, reflecting the innovative breakthrough of China's satellite navigation standard system.
Core content analysis
| File type | Identifier | Key parameters | Update frequency |
|---|---|---|---|
| GNSS observation data | .o/.4 | Pseudorange, carrier phase | 1s~30s |
| BDS integrity file | .i | RURAI/UDREI | 3s |
| Ionospheric Grid | .e | GIVE/GIVEI | 6min |
Key Technical Points
1. File Naming System
The structure of SSSS_DDD[F|MM].YYT] is adopted, where:
- SSSS: 4-letter station code (such as zhon)
- DDD: Day of the year (001-366)
- F: Time period identifier (0-all day, ax corresponds to 24 hours)
2. Data Structure Specification
*RINEX VERSION/TYPE PGM/RUN BY/DATE MARKER NAME #/TYPES OF OBSERV TIME OF FIRST OBS END OF HEADER > [Data Record]
Implementation Suggestions
Typical Application Scenarios
After a provincial CORS station adopted this standard:
- The unified storage efficiency of multi-system data increased by 40%
- The accuracy of BDS integrity information analysis reached 99.7%
- The exchange compatibility with the international IGS data center was 100%
Precautions
- The mixed file needs to clearly identify the time system (BDT/GPS/GLO, etc.)
- The health status information should be obtained from the navigation message in real time
- The 15-minute file needs to include the minute identifier (00/15/30/45)
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