美载人绕月飞行任务完成综合演练 拟3月发射

Core Viewpoint - NASA's Artemis 2 manned lunar mission is set for launch in March following a successful second integrated rehearsal on February 19, which included critical fueling and countdown tests [1][2]. Group 1: Mission Details - The Artemis 2 mission will involve four astronauts aboard the Orion spacecraft for a lunar flyby lasting approximately 10 days [2]. - The earliest launch window for Artemis 2 is March 6, 2023, as confirmed by NASA [1]. Group 2: Technical Preparations - During the rehearsal at Kennedy Space Center, over 700,000 gallons (approximately 2.65 million liters) of liquid propellant were loaded into the Space Launch System rocket [1]. - The rehearsal included closing the Orion spacecraft hatch and conducting two final countdown tests, although astronauts did not participate [1]. - Monitoring during the rehearsal indicated that hydrogen concentrations remained within acceptable limits, and the newly installed fuel delivery interface sealing device functioned properly [1]. Group 3: Previous Issues and Improvements - The first rehearsal faced issues with a liquid hydrogen leak at the rocket's core stage, leading to a halted countdown and the decision to forgo the February launch window [1]. - The Artemis 2 mission management team implemented corrective measures based on the first rehearsal's results, which were reported to be effective [1].