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在地球的环境日益遭到严重威胁,世界各国纷纷采取行动保护我们星球的情况下,利用卫星从空间监视地球的技术正发挥着新的作用,引起人们的重视。美国航宇局(NASA)率先提出了一项耗资150～300亿美元,为期15年的地球观测使命(Missionto Planet Earth)计划。根据这项计划,美国、欧洲和日本将研制和发射新的大型地球监视航天器。苏联最近也提出请求参加这项计划。地球观测使命计划内容为跟踪全球的环境变化,研究陆地、海洋和空气间的复杂的相互影响关系。此项计划,再加上空间站计
As the earth’s environment is increasingly threatened and various countries in the world are taking steps to protect our planet, the technology of using satellites to monitor the Earth from space is playing a new role and attracts people’s attention. NASA pioneered a $ 15- $ 30 billion, 15-year mission to the Planet Earth mission. Under the plan, the United States, Europe and Japan will develop and launch new large-scale Earth-watching spacecraft. The Soviet Union has also recently asked for the plan. Mission Earth Observation Mission Contents To track the global changes in the environment, study the complex interrelationships between land, sea and air. This plan, together with the space station