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中国航天科技集团:火箭入轨精度就像从北京投篮命中上海篮筐
Huan Qiu Wang Zi Xun· 2025-05-29 22:58
Core Viewpoint - The Long March 3B rocket successfully executed its first mission to launch the Tianwen-2 probe into an escape trajectory from Earth, showcasing its enhanced capabilities and precision requirements for space exploration [1][2] Group 1: Rocket Capabilities - The Long March 3B rocket, known for its high thrust and reliability, has undergone improvements since 2020, increasing its payload capacity to 5.55 tons for geostationary transfer orbit [1] - This rocket is recognized as the "strongest" among the Long March 3 series, making it the ideal choice for the Tianwen-2 mission [1] Group 2: Mission Challenges - The Tianwen-2 probe requires a separation speed exceeding 11.2 kilometers per second to enter the escape trajectory, which is significantly higher than the first cosmic speed of 7.9 kilometers per second [1] - The mission's success hinges on achieving high precision in trajectory insertion, with a speed deviation limit of just 1 meter to avoid a potential million-kilometer error in reaching the target asteroid [2] Group 3: Technological Innovations - The development team employed iterative guidance and terminal speed correction technologies to ensure real-time adjustments of the rocket's speed and attitude before the probe's separation [2] - The mission is characterized by its long implementation period and high-risk factors, requiring collaborative efforts to overcome challenges and ensure success [2]