Lunar Relay Satellite Completes Next-Gen Laser Power Handover Test
Laser power link maintains stable window for 7 minutes 12 seconds; data to validate energy budget models for future lunar far-side unmanned stations.
National Space Tracking and Control Center reported: The relay satellite and ground station completed the 11th laser power handover test in the early hours today, achieving a continuous stable window of 7 minutes and 12 seconds, a 43% improvement over last month's test.
Technical Background
The core challenge of lunar far-side exploration is that it never faces Earth directly, preventing direct communication with ground stations. Traditional solutions rely on lunar satellites as relays, but their power supply limitations restrict performance.
The principle of laser power transfer technology:
- Ground laser stations transmit high-power lasers to relay satellites in space
- Satellite photovoltaic cells convert laser to electrical power
- Breaking through traditional solar panel efficiency bottlenecks to achieve higher power transmission
Test Data
Key parameters from this test:
| Parameter | Value | Improvement vs Last Month | |-----------|-------|------------------------| | Stable window duration | 7 min 12 sec | +43% | | Peak power transmission | 2.3 kW | +28% | | Energy conversion efficiency | 47% | +12% | | Beam pointing accuracy | 0.003 arcseconds | Maintained |
Application Prospects
This successful test provides key data for lunar far-side unattended facility design:
- Energy budget model: Validates that laser power can support continuous operation of lunar far-side scientific instruments
- Relay satellite lifespan: Higher power means longer satellite service life
- Crewed mission foundation: Although officials say "not related to crewed plans," laser power technology is key support for future lunar bases
International Comparison
NASA is also developing similar technology for the Artemis program. China's current test leads internationally in power and efficiency.
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