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1970年4月24日,我国第一颗人造地球卫星东方红-1发射升空,至今已在轨运行了整整45年,大家都很关心还能运行多久?影响人造地球卫星轨道寿命的主要因素是地球周围的大气层和卫星本身的外形、质量,尤其是轨道。卫星绕地球运行时,大气的阻力会不断消耗它的动能,使其高度逐渐降低,特别是远地点高度降得更快,轨道逐渐趋圆,最后在稠密大气层中像流星一样陨落。而阻力的大小取决于大气密度、卫星轨道的
On April 24, 1970, China’s first man-made earth satellite, Dongfanghong-1, launched its spacecraft and has been in orbit for a full 45 years so far. Everyone is concerned about how long it can run. The main factors affecting the life span of man-made orbiting satellites Is the shape and quality of the atmosphere around the earth and the satellite itself, especially the orbit. When the satellites orbit around the earth, the resistance of the atmosphere will continue to consume its kinetic energy and gradually reduce its height. In particular, the apogee will drop more rapidly and the orbit will gradually become round and finally fall like a meteor in the dense atmosphere. The size of the resistance depends on the density of the atmosphere, the satellite orbit