GB/T 39396.2-2020 in English
VALIDQuality requirements for international GNSS monitoring and assessmentsystem (iGMAS)—Part 2:Products
- Issued on:2020-11-19
- Implemented on:2021-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 39396.2-2020全球连续监测评估系统（iGMAS）质量要求 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 Standard Core Content
| Product Type | Ultra-fast Product | Fast Product | Final Product |
|---|---|---|---|
| Orbit Accuracy (MEO/IGSO) | Observation:20cm Forecast:30cm | 15cm | 10cm |
| Clock Accuracy | Observation:1.5ns Forecast:2ns | 0.5ns | 0.3ns |
Key Technical Indicators
1. Orbital Product Classification Accuracy
GEO satellite orbit accuracy requirements are significantly lower than MEO/IGSO, reflecting the difference in their orbital characteristics: the final product requires 100cm, while MEO/IGSO requires 10cm.
2. Time-sensitive products
Ultra-fast products use a 3-hour update cycle, including 24-hour observation + 24-hour forecast data, and are suitable for scenarios with high real-time requirements.
Implementation recommendations
Data quality control process
It is recommended to establish a three-level verification mechanism:
1) CRC verification of raw data
2) Residual analysis of product generation process
3) Cross-validation of final product with IGS data
Technology evolution analysis
The standard reflects the characteristics of the BeiDou-3 system:
• Relaxation of GEO satellite accuracy indicators
• Addition of new requirements for differential code deviation (0.3ns)
• Introduction of tropospheric/ionospheric delay products
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