GB/T 41209-2021 in English
VALIDGeneral specifications for laser rangefinder for lunar and planetary exploration
- Issued on:2021-12-31
- Implemented on:2022-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
《GB/T 41209-2021月球与行星探测激光测距仪通用规范》由TC312（全国空间科学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
Background and significance of the standard
With the development of my country's deep space exploration projects, laser rangefinders, as key scientific payloads, have become increasingly subject to standardization requirements. The release of GB/T41209-2021 fills the gap in technical specifications in this field and systematically specifies for the first time the full life cycle technical requirements for laser rangefinders for lunar and planetary exploration.
Core Technical Requirements
| Indicator Category | Lunar Exploration Requirements | Asteroid Exploration Requirements |
|---|---|---|
| Laser Emission Energy | 10-100mJ | 0.1-10mJ |
| Ranging Accuracy | ≤5m@200km | ≤0.5m@50km |
| Working Life | ≥2 Earth Years/1×10⁸ Launches | |
Environmental adaptability requirements
The standard places special emphasis on adaptability to the space environment:
- Temperature cycle: must pass the extreme temperature test of -40℃~+70℃
- Vacuum performance: the optical system must maintain a divergence angle ≤1mrad under a vacuum of 6.65×10⁻³Pa
- Radiation resistance: key materials must pass a 100krad(Si) total dose irradiation test
Test method innovation
The standard first proposes the extinction ratio method to measure the maximum measuring range: by dynamically adjusting the optical attenuation sheet group, a mathematical model of detection probability and extinction coefficient (Formula 4) is established, which solves the calibration problem in the deep space environment.
Implementation recommendations
- During the development phase, it is necessary to focus on the laser vacuum sealing process
- It is recommended to establish a material volatile database to prevent optical contamination
- Dynamic range testing should be performed simultaneously with maximum range testing
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