中国打破地月空间卫星激光测距昼夜限制

Core Insights - The successful completion of laser ranging technology tests in daylight conditions by the Tian Du No. 1 satellite marks a significant breakthrough in precision measurement in deep space, allowing for operations that were previously limited to nighttime only [1][3] - The Tian Du No. 1 and No. 2 satellites are part of a broader initiative to develop a comprehensive lunar navigation and communication constellation system, with the first satellite launched in March 2024 [3] Group 1 - The Tian Du No. 1 satellite successfully conducted laser ranging tests under strong sunlight interference, overcoming challenges posed by background noise that previously restricted operations to nighttime [1] - The technology's successful application expands the observable window for laser ranging, providing a practical engineering foundation for future deep space navigation and positioning capabilities [1][3] - The test was led by the Deep Space Exploration Laboratory, with collaboration from various institutions including Shanghai Satellite Engineering Research Institute and the Chinese Academy of Sciences [3] Group 2 - The Tian Du No. 1 and No. 2 satellites have completed multiple technical tests, including inter-satellite microwave ranging and reliable transmission routing between the Moon and Earth [3] - The advancements in laser ranging technology will support major future deep space exploration projects, such as the International Lunar Research Station [1][3]