XMM航天器的定向与校准性能对所获得的科学结果的质量会产生强烈的影响。发射前的单元试验和分系统试验以及试验后的分析表明,在技术要求上确实留有足够的余量,而且90%以上的预定观测目标都能实现。XMM的光学系统图1所示的XMM航天器的分解图示出 The orientation and calibration of the XMM spacecraft have a strong effect on the quality of the scientific results obtained. Pre-launch unit and subsystem tests and post-test analyzes show that there is indeed sufficient margin on the technical requirements and that more than 90% of the intended observations are achieved. XMM Optical System An exploded view of the XMM spacecraft shown in Figure 1 is shown