【摘要】 针对传统星载SAR两次重轨时间间隔长，难以满足地表动态变化监测需求，提出一种日重复轨道方案，可实现对同一区域每天一次的重轨观测，同时采用星座构型提升覆盖性能，实现全球覆盖。综合分析不同日重复轨道星座方案的覆盖与重访性能，并给出不同日重复轨道系统参数的对比。更多还原

【Abstract】 Aiming at the problem that traditional spaceborne synthetic aperture radar(SAR)has a long time-interval between two repeating-orbits and cannot meet the demand, a daily-repeating-orbit scheme is proposed to realize repeating-orbit observations in the same area once a day; meanwhile, the constellation configuration is adopted to improve the coverage performance and achieve global coverage. Furthermore, this paper compre-hensively analyzes the coverage and revisit performance of different daily-repetitive-orbit constellation schemes, and gives a comparison of system parameters for different daily-repetitive-orbit.更多还原