航天任务是利用人造地球卫星或其他航天器实现军事、民用或商业性目标的总称。与其他领域的任务相比,由于航天任务所依赖的手段具有投资高、风险大、回报高等特点,因此在进行航天任务的设计和实施时,除千方百计降低成本外,提高可靠性,保证较高的飞行成功率和较高的设计性能十分关键。依据所使用的航天器是否载人,可分为载人航天任务和不载人航天任务。前者主要指空间站、航天飞机和载人飞船等载人航天器所执行的任务,后者主要指各种人造地球卫星和脱离地球轨道的各种空间探测器所执行的任务。在所有上述航天任务中,目前给人类带来最大效益的当属人造地球卫星。利用高远位置 The mission of space missions is to use military satellites or other spacecraft to achieve military, civilian or commercial objectives. Compared with the missions in other fields, as the means relied upon by aerospace missions are characterized by high investment, high risk and high returns, they should not only reduce costs but also try to increase the reliability and ensure a high level of security during the design and implementation of space missions The flight success rate and high design performance are crucial. Depending on whether the spacecraft used is manned, it can be divided into manned space missions and unmanned space missions. The former refers mainly to the tasks performed by manned spacecraft such as space stations, space shuttles and manned spacecraft, while the latter mainly refers to the tasks performed by various kinds of man-made earth satellites and various space probes off Earth orbit. Among all the above space missions, man-made earth satellites, which currently bring the greatest benefit to mankind, are to be considered. Use lofty location