GB/T 41459-2022 in English
VALIDSpace environment—Space total solar irradiance
- Issued on:2022-04-15
- Implemented on:2022-11-01
- File Format:PDF
- Delivery:Via email within 5 business days
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《GB/T 41459-2022空间环境 空间太阳总辐照度》由TC425（全国宇航技术及其应用标准化技术委员会）归口，主管部门为中国科学院。
Introduction
Interpretation of the core content of the standard
Definition of the solar spectrum
The standard divides the solar electromagnetic radiation into 5 characteristic bands:
| Band | Wavelength range | Energy proportion |
|---|---|---|
| γ rays | 0.00001-0.001nm | 0.003% |
| X-rays | 0.001-10nm | 0.02% |
| Ultraviolet light | 10-400nm | 8.7% |
| Visible light | 380-760nm | 44.3% |
| Infrared light | 760-1000000nm | 46.9% |
Key data indicators
Earth orbit solar constant
The standard value at 1AU is 1366.1 W/m², which changes with the orbital position:
- Perihelion: 1412.9 W/m² (+3.4%)
- Aphelion: 1321.6 W/m² (-3.3%)
Interplanetary Irradiance Comparison
| Planets | Perihelion (W/m²) | Aphelion (W/m²) |
|---|---|---|
| Mercury | 9116.4 | 14447.5 |
| Venus | 2646.4 | 2713.5 |
| Mars | 715.9 | 493.7 |
Engineering Application Guidance
Key Points in Spacecraft Design
- The thermal control system needs to consider the annual irradiance fluctuation of ±3.3%
- The design of the solar array should refer to the AM0 spectral data (Table 4-5)
- The optical system needs to be specially protected for the ultraviolet band (10-400nm)
Implementation Recommendations
Space Telescope Calibration Case:
- Absolute calibration using the 0.2-2.5μm band data in the standard (Table 5)
- The seasonal correction of ±1.7% caused by the eccentricity of the Earth’s orbit needs to be considered
Technology Evolution Analysis
Compared with ASTM E490-00a, this standard:
- Added interplanetary environment data (Table 3)
- Expanded the spectral range to 0.1195-1000μm
- Provided the equinox and solstice data specifically required by China’s aerospace engineering
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