人类对宇宙的探索自古有之,随着科技的不断进步,航天技术也随之取得了飞跃的发展。自前苏联发射了世界上第一颗人造卫星以来,各种用途的卫星层出不穷,并已广泛应用于科学研究、宇宙观测、气象观测、国际通信等许多领域。经过约50余年的发展,卫星及相关技术日趋成熟,功能日趋完 Human exploration of the universe has existed since ancient times, with the continuous improvement of science and technology, space technology has also made leaps and bounds. Since the Soviet Union launched the world's first satellite, the satellites of various uses have been emerging in an endless stream and have been widely used in many fields such as scientific research, cosmic observations, meteorological observation and international communications. After about 50 years of development, the satellite and related technologies are becoming more sophisticated and their functions are becoming more and more complete