GB/T 39397.2-2020 in English
VALIDFile format of international GNSS monitoring and assessment system (iGMAS)—Part 2:Products
- Issued on:2020-11-19
- Implemented on:2021-06-01
- File Format:PDF
- Delivery:Via email within 10 business days
$903.00
| Standard No: | GB/T 39397.2-2020 |
| Document status: | VALID |
| Title in English: | File format of international GNSS monitoring and assessment system (iGMAS)—Part 2:Products |
| Title in Chinese: | 全球连续监测评估系统（iGMAS）文件格式 第2部分：产品 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 10 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 Keywords: | igmas system
assessment system file format beidou system file format specifications |
| Related Topics: | continuous monitoring
13th Five-Year Assessment Format evaluation system Ruiyi Continuous Monitoring System Evaluation system Global Monitoring System global monitoring GB/T 39397.2 GB/T 39397.2-2020 worldwide |
《GB/T 39397.2-2020全球连续监测评估系统（iGMAS）文件格式 第2部分：产品》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
Analysis of the core content of the standard
GB/T39397.2-2020, as an important supporting standard of the BeiDou system, defines the file format specifications for 9 major product categories of the iGMAS system:
- Satellite orbit products: SP3 format (accuracy up to 1mm)
- Satellite clock error products: including 5 data types such as AS/AR/MS
- Earth rotation parameters: 4 parameters such as polar motion (X/Y) and UT1-UTC
Typical application scenario: When a BeiDou ground-based augmentation system needs to integrate data from multiple analysis centers, the file naming rules in Chapter 4 of this standard must be strictly followed:
Ultra-fast product:isu06586_00.sp3 (isc agency 658th week Saturday orbit file) Key Technical Indicators Comparison
| Product Type | Temporal Resolution | Spatial Resolution | Accuracy Requirements |
|---|---|---|---|
| Satellite Orbit | 15min | N/A | ≤8mm (Broadcast Ephemeris) |
| Ionospheric Delay | 2h | 5°×2.5° | 0.1TECU |
| Service performance | 60min | Single station | Horizontal 0.5m (95%) |
Implementation suggestions
Pay special attention to the data exchange link:
- Orbit products must include P(position)/V(velocity) records and EP/EV accuracy information
- Clock error files must declare TIMESYSTEMID (BDT/GPS, etc.)
- When ionospheric products use the IONEX format, the altitude angle cutoff value must be marked (default 10°)
Innovation of the standard: For the first time, the inter-frequency deviation (DCB) file format of the BeiDou-3 B2b frequency point is specified. For details, see Chapter 11 Special naming rules: acc201409.dcb
Technology Evolution Analysis
Compared with the RINEX3.04 standard, this standard adds:
- Phase center parameters of the new BDS-3 signal system (B1C/B2a)
- Multi-GNSS system time difference monitoring product format (CG/CR and other combinations)
- Seven-dimensional indicator system for space signal quality assessment (see Table 20)
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