In recent years, small satellites, which are more and more popular and affordable, have been already widely applied in observation and monitoring missions. However, it is a tough problem to meet the different mission requirements with such limits as space, energy, and devices. In this paper, we propose a practical target searching scheme for a small satellite which suffers from the device limits during the first 7.5 seconds after the launch separation. Due to the device limits at the beginning of the separation, the initial attitude of the satellite and the position of the target that the following observation task is based on are both unknown. In order to solve this problem, a backward integral strategy used to estimate the initial attitude and a target searching method intended to ensure the satellite acquires the target rapidly are included in the scheme. Simulation results proved that this scheme enabled the satellite, regardless of the initial conditions, to acquire the target within the limited observation time.

中文翻译：

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具有设备限制的小型卫星的快速目标搜索方案

近年来，越来越受欢迎和负担得起的小型卫星已经广泛用于观察和监测任务。然而，以空间，能量和设备等限制来满足不同的任务要求是一个棘手的问题。在本文中，我们为小型卫星提出了一种实用的目标搜索方案，该方案在发射分离后的最初7.5秒内受到设备限制。由于分离开始时的设备限制，卫星的初始姿态和后续观测任务所基于的目标位置都是未知的。为了解决这个问题，该方案包括用于估计初始姿态的后向积分策略和旨在确保卫星迅速获取目标的目标搜索方法。仿真结果证明，该方案使卫星，无论初始条件如何，都可以在有限的观察时间内获得目标。