GB/T 39094-2020 in English
VALIDTerminologies for the Chinese meteorological satellites
- Issued on:2020-09-29
- Implemented on:2021-04-01
- File Format:PDF
- Delivery:Within 1 day
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《GB/T 39094-2020中国气象卫星名词术语》由TC347（全国卫星气象与空间天气标准化技术委员会）归口，主管部门为中国气象局。
Introduction
Standard Overview and Technical Background
GB/T39094-2020 is my country's first national standard specifically regulating meteorological satellite terminology. It was proposed by the China Meteorological Administration and managed by the National Technical Committee for Satellite Meteorology and Space Weather Standardization. The standard will be implemented from April 1, 2021, and systematically defines 138 professional terms related to the Fengyun series satellites.
Analysis of the core terminology system
| Term category | Key terms | Technical points |
|---|---|---|
| Orbit type | Geostationary orbit/polar orbit | Orbit inclination 0° vs nearly 90°, period 24h vs 102min |
| Satellite series | FY-1 to FY-4 | Odd-number polar orbit (3-axis stabilized), even-number stationary (spin-stabilized) |
| Observation instrument | Interferometric atmospheric vertical sounder | Spectral resolution reaches 0.6cm-1, and the accuracy of temperature and humidity profile inversion is improved by 40% |
Evolution of key technologies
Observation instrument development path
From visible light infrared scanning radiometer (FY-1) to multi-channel scanning imaging radiometer (FY-4A), the spatial resolution is improved from 1.1km to 500m, and the spectral channels are increased from 5 to 14. The microwave hygrometer carried by FY-3D can realize all-weather atmospheric humidity detection, and the data quantization level reaches 12bit.
Data Processing System
The standard clearly defines a four-level processing flow from raw data to application products: raw observation data → stretched image → compressed data → thematic products. The LRIT transmission rate of the FY-2G satellite reaches 128kbps, which is 8 times higher than that of earlier models.
Implementation Suggestions
- The terminology of spin-stabilized and three-axis stabilized attitude control systems should be strictly distinguished in satellite engineering design
- The data processing link needs to mark the data level according to the standard specifications (such as 5.1.2 stretched data)
- The standard numbering system such as "FY-3E" is uniformly adopted in international collaboration
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