The telescope design of a very high-resolution earth observation satellite is a challenging task, due to several constraints, including the size, mass, performance, tolerance, assembly, integrating, and environmental aspects. However, the demand for very high-resolution satellite imageries has increased day by day due to the numerous commercial and military applications. In this paper, two different optical configurations with ground sampling distance of 25 cm are investigated according to a definite mission statement. The first configuration represents an on-axis Korsch scheme, whereas the second design is based on the arrangement of the off-axis three-mirror anastigmatic configuration. Both designs have the advantage of small conic mirror constants without higher order parameters. Tolerance analysis of both designs utilizing a Monte Carlo algorithm is performed. The suggested baffling arrangements are simulated and tested according to a series of point sources with different off-axis angles. Finally, a comparison between the performance of the proposed designs and a recent study given by the French space agency is presented. The results show that the proposed designs can be implemented by the existing technologies and launched into space by the available launch vehicles.

中文翻译：

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超高分辨率卫星望远镜的设计第一部分：光学系统设计

由于尺寸、质量、性能、容差、组装、集成和环境等方面的限制，极高分辨率地球观测卫星的望远镜设计是一项具有挑战性的任务。然而，由于众多的商业和军事应用，对超高分辨率卫星图像的需求日益增加。在本文中，根据明确的任务说明，研究了地面采样距离为 25 cm 的两种不同光学配置。第一种配置代表同轴 Korsch 方案，而第二种设计基于离轴三镜像散配置的排列。两种设计都具有圆锥镜常数小而没有高阶参数的优点。使用蒙特卡罗算法对两种设计进行公差分析。根据一系列具有不同离轴角度的点源来模拟和测试建议的挡板布置。最后，介绍了拟议设计的性能与法国航天局最近进行的一项研究之间的比较。结果表明，所提出的设计可以通过现有技术实现，并由可用的运载火箭发射到太空。