Core Viewpoint - The successful completion of the lunar laser ranging technology test by the "Tiandu-1" satellite under daytime strong light interference marks a significant technological breakthrough for China in the field of precise measurement in deep space orbits [1] Group 1: Technological Achievements - "Tiandu-1" has successfully conducted the world's first lunar laser ranging test during the daytime, overcoming challenges posed by strong solar light interference [1] - The test involved precise tracking and signal capture of weak satellite echo signals, which are typically difficult to identify due to background noise during the day [1] - This advancement expands the observational window for laser ranging technology, supporting major deep space exploration projects such as the International Lunar Research Station [1] Group 2: Mission Details - "Tiandu-1" was launched in March 2024 alongside the "Qiao Qiao-2" satellite, with its core mission focused on validating new communication and navigation technologies for future lunar communication and navigation constellation systems [1] - The satellite has already completed multiple new technology tests in orbit, demonstrating its capabilities and contributions to the field [1]