美国国家航空航天局的南希·格蕾丝·罗曼空间望远镜完成了关键的指向稳定性测试，验证了其能够以极高精度跟踪目标的能力1。该望远镜的指向稳定度优于百万分之一度，在宽视场仪工作模式下可维持半小时，在冠状仪工作模式下可维持8小时1。为说明这一精度水平，工程师们形容其相当于从约240公里的距离用激光照准一枚美国硬币，且预期可进一步改进至370公里1。
9月22日，罗曼望远镜的冠状仪首次接收宇宙光线1。该仪器随后成功观测到大麦哲伦星云中的星体，确认了其能够产生清晰聚焦图像的能力1。细导星系统每秒向姿态控制系统报告四次导星位置，为高精度跟踪提供了基础支撑1。罗曼望远镜采用的光谱制导模式是空间望远镜首次以这种方式应用该技术1。
NASA's Nancy Grace Roman Space Telescope has successfully completed pointing stability tests and received cosmic light for the first time, marking a major milestone in its mission to detect exoplanets.1 On September 22, the telescope's coronagraph instrument captured starlight from the Large Magellanic Cloud, producing clear, focused images that confirm the instrument is functioning as designed.1
The telescope demonstrated exceptional precision in its pointing capability, achieving stability better than 1/100,000 of a degree—a feat equivalent to using a laser to target a U.S. coin from approximately 240 kilometers away, with engineers expecting to improve that distance to 370 kilometers.1 The wide-field instrument can maintain this level of accuracy for half an hour, while the coronagraph sustains it for eight hours.1 A fine guidance star system reports the telescope's pointing position to its attitude control system four times per second, enabling this extraordinary precision.1
The Roman telescope employs a spectroscopic guidance mode for its operations, representing the first time a space telescope has applied this technique in this manner.1 These successful tests represent critical validation that the observatory is ready to begin its hunt for distant planets and other cosmic phenomena.
评论
还没有评论，欢迎留下第一条。