(一) 近十几年来,遙感技术已经在美国、苏联、日本、加拿大等国的气象、农业、地质勘探、制图、海洋等各个领域取得了巨大的成功,获得了明显的经济收益。例如,美国估算海洋卫星可使渔业获利8—14亿美元;陆地卫 (I) In recent decades, remote sensing technology has achieved great success in all fields of meteorology, agriculture, geological prospecting, cartography and oceans in the United States, the Soviet Union, Japan, Canada and other countries and has obtained obvious economic benefits. For example, the United States estimates that marine satellites can make a profit of 8-140 billion U.S. dollars for fisheries;