自1972年美国第一颗陆地卫星发射以来,遥感在世界范围内得到了迅速的发展和广泛的应用,引起了各界人士和许多国家的关注和重视。但是,从目前遥感,特别是航天遥感的技术水平和应用状况来看,尚不能满足有效地解决各应用领域中不断地提出来的各种实际问题的需要。 Since the launch of the first U.S. terrestrial satellite in 1972, remote sensing has been rapidly developed and widely used worldwide, arousing the concern and attention of people from all walks of life and many countries. However, judging from the current remote sensing technology, especially the technical level and application status of aerospace remote sensing, it still can not meet the need of effectively solving various practical problems continuously raised in various application fields.