the technique of adaptive sampling is determining the next revisit time according to the target's motion.
自适应采样是在一定的跟蹤精度下,依据目标运动状态来判断下一次采样时间。
resultsall cases obtain the revisit, the revisit time are shortest for 6 months, longest 30 months.
结果所有病例均获得随访,随访时间最短6个月,最长30个月。
in some cases, constellations are required to visit any ground targets in the globe. it does not need continuous coverage, but just satisfying limits of certain revisit time and even temporal phases.
在某些情况下,卫星星座需要对全球地面目标进行访问,但对连续性覆盖要求不高,只要满足一定的访问间隔时间限制,访问时相比较均匀即可。